Project acronym AQSuS
Project Analog Quantum Simulation using Superconducting Qubits
Researcher (PI) Gerhard KIRCHMAIR
Host Institution (HI) UNIVERSITAET INNSBRUCK
Call Details Starting Grant (StG), PE3, ERC-2016-STG
Summary AQSuS aims at experimentally implementing analogue quantum simulation of interacting spin models in two-dimensional geometries. The proposed experimental approach paves the way to investigate a broad range of currently inaccessible quantum phenomena, for which existing analytical and numerical methods reach their limitations. Developing precisely controlled interacting quantum systems in 2D is an important current goal well beyond the field of quantum simulation and has applications in e.g. solid state physics, computing and metrology.
To access these models, I propose to develop a novel circuit quantum-electrodynamics (cQED) platform based on the 3D transmon qubit architecture. This platform utilizes the highly engineerable properties and long coherence times of these qubits. A central novel idea behind AQSuS is to exploit the spatial dependence of the naturally occurring dipolar interactions between the qubits to engineer the desired spin-spin interactions. This approach avoids the complicated wiring, typical for other cQED experiments and reduces the complexity of the experimental setup. The scheme is therefore directly scalable to larger systems. The experimental goals are:
1) Demonstrate analogue quantum simulation of an interacting spin system in 1D & 2D.
2) Establish methods to precisely initialize the state of the system, control the interactions and readout single qubit states and multi-qubit correlations.
3) Investigate unobserved quantum phenomena on 2D geometries e.g. kagome and triangular lattices.
4) Study open system dynamics with interacting spin systems.
AQSuS builds on my backgrounds in both superconducting qubits and quantum simulation with trapped-ions. With theory collaborators my young research group and I have recently published an article in PRB [9] describing and analysing the proposed platform. The ERC starting grant would allow me to open a big new research direction and capitalize on the foundations established over the last two years.
Summary
AQSuS aims at experimentally implementing analogue quantum simulation of interacting spin models in two-dimensional geometries. The proposed experimental approach paves the way to investigate a broad range of currently inaccessible quantum phenomena, for which existing analytical and numerical methods reach their limitations. Developing precisely controlled interacting quantum systems in 2D is an important current goal well beyond the field of quantum simulation and has applications in e.g. solid state physics, computing and metrology.
To access these models, I propose to develop a novel circuit quantum-electrodynamics (cQED) platform based on the 3D transmon qubit architecture. This platform utilizes the highly engineerable properties and long coherence times of these qubits. A central novel idea behind AQSuS is to exploit the spatial dependence of the naturally occurring dipolar interactions between the qubits to engineer the desired spin-spin interactions. This approach avoids the complicated wiring, typical for other cQED experiments and reduces the complexity of the experimental setup. The scheme is therefore directly scalable to larger systems. The experimental goals are:
1) Demonstrate analogue quantum simulation of an interacting spin system in 1D & 2D.
2) Establish methods to precisely initialize the state of the system, control the interactions and readout single qubit states and multi-qubit correlations.
3) Investigate unobserved quantum phenomena on 2D geometries e.g. kagome and triangular lattices.
4) Study open system dynamics with interacting spin systems.
AQSuS builds on my backgrounds in both superconducting qubits and quantum simulation with trapped-ions. With theory collaborators my young research group and I have recently published an article in PRB [9] describing and analysing the proposed platform. The ERC starting grant would allow me to open a big new research direction and capitalize on the foundations established over the last two years.
Max ERC Funding
1 498 515 €
Duration
Start date: 2017-04-01, End date: 2022-03-31
Project acronym ArcheoDyn
Project Globular clusters as living fossils of the past of galaxies
Researcher (PI) Petrus VAN DE VEN
Host Institution (HI) UNIVERSITAT WIEN
Call Details Consolidator Grant (CoG), PE9, ERC-2016-COG
Summary Globular clusters (GCs) are enigmatic objects that hide a wealth of information. They are the living fossils of the history of their native galaxies and the record keepers of the violent events that made them change their domicile. This proposal aims to mine GCs as living fossils of galaxy evolution to address fundamental questions in astrophysics: (1) Do satellite galaxies merge as predicted by the hierarchical build-up of galaxies? (2) Which are the seeds of supermassive black holes in the centres of galaxies? (3) How did star formation originate in the earliest phases of galaxy formation? To answer these questions, novel population-dependent dynamical modelling techniques are required, whose development the PI has led over the past years. This uniquely positions him to take full advantage of the emerging wealth of chemical and kinematical data on GCs.
Following the tidal disruption of satellite galaxies, their dense GCs, and maybe even their nuclei, are left as the most visible remnants in the main galaxy. The hierarchical build-up of their new host galaxy can thus be unearthed by recovering the GCs’ orbits. However, currently it is unclear which of the GCs are accretion survivors. Actually, the existence of a central intermediate mass black hole (IMBH) or of multiple stellar populations in GCs might tell which ones are accreted. At the same time, detection of IMBHs is important as they are predicted seeds for supermassive black holes in galaxies; while the multiple stellar populations in GCs are vital witnesses to the extreme modes of star formation in the early Universe. However, for every putative dynamical IMBH detection so far there is a corresponding non-detection; also the origin of multiple stellar populations in GCs still lacks any uncontrived explanation. The synergy of novel techniques and exquisite data proposed here promises a breakthrough in this emerging field of dynamical archeology with GCs as living fossils of the past of galaxies.
Summary
Globular clusters (GCs) are enigmatic objects that hide a wealth of information. They are the living fossils of the history of their native galaxies and the record keepers of the violent events that made them change their domicile. This proposal aims to mine GCs as living fossils of galaxy evolution to address fundamental questions in astrophysics: (1) Do satellite galaxies merge as predicted by the hierarchical build-up of galaxies? (2) Which are the seeds of supermassive black holes in the centres of galaxies? (3) How did star formation originate in the earliest phases of galaxy formation? To answer these questions, novel population-dependent dynamical modelling techniques are required, whose development the PI has led over the past years. This uniquely positions him to take full advantage of the emerging wealth of chemical and kinematical data on GCs.
Following the tidal disruption of satellite galaxies, their dense GCs, and maybe even their nuclei, are left as the most visible remnants in the main galaxy. The hierarchical build-up of their new host galaxy can thus be unearthed by recovering the GCs’ orbits. However, currently it is unclear which of the GCs are accretion survivors. Actually, the existence of a central intermediate mass black hole (IMBH) or of multiple stellar populations in GCs might tell which ones are accreted. At the same time, detection of IMBHs is important as they are predicted seeds for supermassive black holes in galaxies; while the multiple stellar populations in GCs are vital witnesses to the extreme modes of star formation in the early Universe. However, for every putative dynamical IMBH detection so far there is a corresponding non-detection; also the origin of multiple stellar populations in GCs still lacks any uncontrived explanation. The synergy of novel techniques and exquisite data proposed here promises a breakthrough in this emerging field of dynamical archeology with GCs as living fossils of the past of galaxies.
Max ERC Funding
1 999 250 €
Duration
Start date: 2017-09-01, End date: 2022-08-31
Project acronym BEAMING
Project Detecting massive-planet/brown-dwarf/low-mass-stellar companions with the beaming effect
Researcher (PI) Moshe Zvi Mazeh
Host Institution (HI) TEL AVIV UNIVERSITY
Call Details Advanced Grant (AdG), PE9, ERC-2011-ADG_20110209
Summary "I propose to lead an international observational effort to characterize the population of massive planets, brown dwarf and stellar secondaries orbiting their parent stars with short periods, up to 10-30 days. The effort will utilize the superb, accurate, continuous lightcurves of more than hundred thousand stars obtained recently by two space missions – CoRoT and Kepler. I propose to use these lightcurves to detect non-transiting low-mass companions with a new algorithm, BEER, which I developed recently together with Simchon Faigler. BEER searches for the beaming effect, which causes the stellar intensity to increase if the star is moving towards the observer. The combination of the beaming effect with other modulations induced by a low-mass companion produces periodic modulation with a specific signature, which is used to detect small non-transiting companions. The accuracy of the space mission lightcurves is enough to detect massive planets with short periods. The proposed project is equivalent to a radial-velocity survey of tens of thousands of stars, instead of the presently active surveys which observe only hundreds of stars.
We will use an assortment of telescopes to perform radial velocity follow-up observations in order to confirm the existence of the detected companions, and to derive their masses and orbital eccentricities. We will discover many tens, if not hundreds, of new massive planets and brown dwarfs with short periods, and many thousands of new binaries. The findings will enable us to map the mass, period, and eccentricity distributions of planets and stellar companions, determine the upper mass of planets, understand the nature of the brown-dwarf desert, and put strong constrains on the theory of planet and binary formation and evolution."
Summary
"I propose to lead an international observational effort to characterize the population of massive planets, brown dwarf and stellar secondaries orbiting their parent stars with short periods, up to 10-30 days. The effort will utilize the superb, accurate, continuous lightcurves of more than hundred thousand stars obtained recently by two space missions – CoRoT and Kepler. I propose to use these lightcurves to detect non-transiting low-mass companions with a new algorithm, BEER, which I developed recently together with Simchon Faigler. BEER searches for the beaming effect, which causes the stellar intensity to increase if the star is moving towards the observer. The combination of the beaming effect with other modulations induced by a low-mass companion produces periodic modulation with a specific signature, which is used to detect small non-transiting companions. The accuracy of the space mission lightcurves is enough to detect massive planets with short periods. The proposed project is equivalent to a radial-velocity survey of tens of thousands of stars, instead of the presently active surveys which observe only hundreds of stars.
We will use an assortment of telescopes to perform radial velocity follow-up observations in order to confirm the existence of the detected companions, and to derive their masses and orbital eccentricities. We will discover many tens, if not hundreds, of new massive planets and brown dwarfs with short periods, and many thousands of new binaries. The findings will enable us to map the mass, period, and eccentricity distributions of planets and stellar companions, determine the upper mass of planets, understand the nature of the brown-dwarf desert, and put strong constrains on the theory of planet and binary formation and evolution."
Max ERC Funding
1 737 600 €
Duration
Start date: 2012-01-01, End date: 2016-12-31
Project acronym CASe
Project Combinatorics with an analytic structure
Researcher (PI) Karim ADIPRASITO
Host Institution (HI) THE HEBREW UNIVERSITY OF JERUSALEM
Call Details Starting Grant (StG), PE1, ERC-2016-STG
Summary "Combinatorics, and its interplay with geometry, has fascinated our ancestors as shown by early stone carvings in the Neolithic period. Modern combinatorics is motivated by the ubiquity of its structures in both pure and applied mathematics.
The work of Hochster and Stanley, who realized the relation of enumerative questions to commutative algebra and toric geometry made a vital contribution to the development of this subject. Their work was a central contribution to the classification of face numbers of simple polytopes, and the initial success lead to a wealth of research in which combinatorial problems were translated to algebra and geometry and then solved using deep results such as Saito's hard Lefschetz theorem. As a caveat, this also made branches of combinatorics reliant on algebra and geometry to provide new ideas.
In this proposal, I want to reverse this approach and extend our understanding of geometry and algebra guided by combinatorial methods. In this spirit I propose new combinatorial approaches to the interplay of curvature and topology, to isoperimetry, geometric analysis, and intersection theory, to name a few. In addition, while these subjects are interesting by themselves, they are also designed to advance classical topics, for example, the diameter of polyhedra (as in the Hirsch conjecture), arrangement theory (and the study of arrangement complements), Hodge theory (as in Grothendieck's standard conjectures), and realization problems of discrete objects (as in Connes embedding problem for type II factors).
This proposal is supported by the review of some already developed tools, such as relative Stanley--Reisner theory (which is equipped to deal with combinatorial isoperimetries), combinatorial Hodge theory (which extends the ``K\""ahler package'' to purely combinatorial settings), and discrete PDEs (which were used to construct counterexamples to old problems in discrete geometry)."
Summary
"Combinatorics, and its interplay with geometry, has fascinated our ancestors as shown by early stone carvings in the Neolithic period. Modern combinatorics is motivated by the ubiquity of its structures in both pure and applied mathematics.
The work of Hochster and Stanley, who realized the relation of enumerative questions to commutative algebra and toric geometry made a vital contribution to the development of this subject. Their work was a central contribution to the classification of face numbers of simple polytopes, and the initial success lead to a wealth of research in which combinatorial problems were translated to algebra and geometry and then solved using deep results such as Saito's hard Lefschetz theorem. As a caveat, this also made branches of combinatorics reliant on algebra and geometry to provide new ideas.
In this proposal, I want to reverse this approach and extend our understanding of geometry and algebra guided by combinatorial methods. In this spirit I propose new combinatorial approaches to the interplay of curvature and topology, to isoperimetry, geometric analysis, and intersection theory, to name a few. In addition, while these subjects are interesting by themselves, they are also designed to advance classical topics, for example, the diameter of polyhedra (as in the Hirsch conjecture), arrangement theory (and the study of arrangement complements), Hodge theory (as in Grothendieck's standard conjectures), and realization problems of discrete objects (as in Connes embedding problem for type II factors).
This proposal is supported by the review of some already developed tools, such as relative Stanley--Reisner theory (which is equipped to deal with combinatorial isoperimetries), combinatorial Hodge theory (which extends the ``K\""ahler package'' to purely combinatorial settings), and discrete PDEs (which were used to construct counterexamples to old problems in discrete geometry)."
Max ERC Funding
1 337 200 €
Duration
Start date: 2016-12-01, End date: 2021-11-30
Project acronym CC4SOL
Project Towards chemical accuracy in computational materials science
Researcher (PI) Andreas GRÜNEIS
Host Institution (HI) TECHNISCHE UNIVERSITAET WIEN
Call Details Starting Grant (StG), PE3, ERC-2016-STG
Summary This project aims at the development of a novel toolbox of ab-initio methods that approximate the true many-electron wavefunction using systematically improvable perturbation and coupled-cluster theories. The demand and prospects for these methods are excellent given that the highly-accurate coupled-cluster theories can predict atomization- and reaction energies in a wide range of solids and molecules with chemical accuracy (≈43 meV). However, the computational cost involved inhibits their widespread use in the field of materials science so far. A multitude of suggested developments in the present proposal hold the promise to reduce the computational cost beyond what is currently considered possible by the community. These include explicit correlation methods that augment the conventional wavefunction expansion with terms that depend on the electron pair correlation factors. In contrast to the widely-used homogeneous correlation factors, this proposal aims at the investigation of inhomogeneous correlation factors that can also capture van der Waals interactions. Furthermore this proposal seeks to employ a recently developed combination of atom-centered basis functions and plane wave basis sets, maximizing the compactness in the wavefunction expansion. The combination of these ideas bears the potential to reduce the computational cost of coupled-cluster calculations in solids by three orders of magnitude, leading to a breakthrough in the field of highly-accurate ab-initio simulations. As such the study of challenging solid state physics and chemistry problems forms an important part of this proposal. We seek to investigate molecular adsorption and reactions in zeolites and on surfaces, pressure-driven solid-solid phase transitions of two dimensional layered materials and defects in solids. These problems are paradigmatic for van der Waals interactions and strong correlation, and methods that describe their electronic structure accurately are highly sought after.
Summary
This project aims at the development of a novel toolbox of ab-initio methods that approximate the true many-electron wavefunction using systematically improvable perturbation and coupled-cluster theories. The demand and prospects for these methods are excellent given that the highly-accurate coupled-cluster theories can predict atomization- and reaction energies in a wide range of solids and molecules with chemical accuracy (≈43 meV). However, the computational cost involved inhibits their widespread use in the field of materials science so far. A multitude of suggested developments in the present proposal hold the promise to reduce the computational cost beyond what is currently considered possible by the community. These include explicit correlation methods that augment the conventional wavefunction expansion with terms that depend on the electron pair correlation factors. In contrast to the widely-used homogeneous correlation factors, this proposal aims at the investigation of inhomogeneous correlation factors that can also capture van der Waals interactions. Furthermore this proposal seeks to employ a recently developed combination of atom-centered basis functions and plane wave basis sets, maximizing the compactness in the wavefunction expansion. The combination of these ideas bears the potential to reduce the computational cost of coupled-cluster calculations in solids by three orders of magnitude, leading to a breakthrough in the field of highly-accurate ab-initio simulations. As such the study of challenging solid state physics and chemistry problems forms an important part of this proposal. We seek to investigate molecular adsorption and reactions in zeolites and on surfaces, pressure-driven solid-solid phase transitions of two dimensional layered materials and defects in solids. These problems are paradigmatic for van der Waals interactions and strong correlation, and methods that describe their electronic structure accurately are highly sought after.
Max ERC Funding
1 460 826 €
Duration
Start date: 2017-07-01, End date: 2022-06-30
Project acronym COMPECON
Project Complexity and Simplicity in Economic Mechanisms
Researcher (PI) Noam NISAN
Host Institution (HI) THE HEBREW UNIVERSITY OF JERUSALEM
Call Details Advanced Grant (AdG), PE6, ERC-2016-ADG
Summary As more and more economic activity is moving to the Internet, familiar economic mechanisms are being deployed
at unprecedented scales of size, speed, and complexity. In many cases this new complexity becomes the defining
feature of the deployed economic mechanism and the quantitative difference becomes a key qualitative one.
A well-studied example of such situations is how the humble single-item auction suddenly becomes a
billion-times repeated online ad auction, or even becomes a combinatorial auction with exponentially
many possible outcomes. Similar complexity explosions occur with various markets, with information
dissemination, with pricing structures, and with many other economic mechanisms.
The aim of this proposal is to study the role and implications of such complexity and to start
developing a coherent economic theory that can handle it. We aim to identify various measures of
complexity that are crucial bottlenecks and study them. Examples of such complexities include the
amount of access to data, the length of the description of a mechanism, its communication requirements,
the cognitive complexity required from users, and, of course, the associated computational complexity.
On one hand we will attempt finding ways of effectively dealing with complexity when it is needed, and on
the other hand, attempt avoiding complexity, when possible, replacing it with ``simple'' alternatives
without incurring too large of a loss.
Summary
As more and more economic activity is moving to the Internet, familiar economic mechanisms are being deployed
at unprecedented scales of size, speed, and complexity. In many cases this new complexity becomes the defining
feature of the deployed economic mechanism and the quantitative difference becomes a key qualitative one.
A well-studied example of such situations is how the humble single-item auction suddenly becomes a
billion-times repeated online ad auction, or even becomes a combinatorial auction with exponentially
many possible outcomes. Similar complexity explosions occur with various markets, with information
dissemination, with pricing structures, and with many other economic mechanisms.
The aim of this proposal is to study the role and implications of such complexity and to start
developing a coherent economic theory that can handle it. We aim to identify various measures of
complexity that are crucial bottlenecks and study them. Examples of such complexities include the
amount of access to data, the length of the description of a mechanism, its communication requirements,
the cognitive complexity required from users, and, of course, the associated computational complexity.
On one hand we will attempt finding ways of effectively dealing with complexity when it is needed, and on
the other hand, attempt avoiding complexity, when possible, replacing it with ``simple'' alternatives
without incurring too large of a loss.
Max ERC Funding
2 026 706 €
Duration
Start date: 2017-05-01, End date: 2022-04-30
Project acronym CRYOMATH
Project Cryo-electron microscopy: mathematical foundations and algorithms
Researcher (PI) Yoel SHKOLNISKY
Host Institution (HI) TEL AVIV UNIVERSITY
Call Details Consolidator Grant (CoG), PE1, ERC-2016-COG
Summary The importance of understanding the functions of the basic building blocks of life, such as proteins, cannot be overstated (as asserted by two recent Nobel prizes in Chemistry), as this understanding unravels the mechanisms that control all organisms. The critical step towards such an understanding is to reveal the structures of these building blocks. A leading method for resolving such structures is cryo-electron microscopy (cryo-EM), in which the structure of a molecule is recovered from its images taken by an electron microscope, by using sophisticated mathematical algorithms (to which my group has made several key mathematical and algorithmic contributions). Due to hardware breakthroughs in the past three years, cryo-EM has made a giant leap forward, introducing capabilities that until recently were unimaginable, opening an opportunity to revolutionize our biological understanding. As extracting information from cryo-EM experiments completely relies on mathematical algorithms, the method’s deep mathematical challenges that have emerged must be solved as soon as possible. Only then cryo-EM could realize its nearly inconceivable potential. These challenges, for which no adequate solutions exist (or none at all), focus on integrating information from huge sets of extremely noisy images reliability and efficiently. Based on the experience of my research group in developing algorithms for cryo-EM data processing, gained during the past eight years, we will address the three key open challenges of the field – a) deriving reliable and robust reconstruction algorithms from cryo-EM data, b) developing tools to process heterogeneous cryo-EM data sets, and c) devising validation and quality measures for structures determined from cryo-EM data. The fourth goal of the project, which ties all goals together and promotes the broad interdisciplinary impact of the project, is to merge all our algorithms into a software platform for state-of-the-art processing of cryo-EM data.
Summary
The importance of understanding the functions of the basic building blocks of life, such as proteins, cannot be overstated (as asserted by two recent Nobel prizes in Chemistry), as this understanding unravels the mechanisms that control all organisms. The critical step towards such an understanding is to reveal the structures of these building blocks. A leading method for resolving such structures is cryo-electron microscopy (cryo-EM), in which the structure of a molecule is recovered from its images taken by an electron microscope, by using sophisticated mathematical algorithms (to which my group has made several key mathematical and algorithmic contributions). Due to hardware breakthroughs in the past three years, cryo-EM has made a giant leap forward, introducing capabilities that until recently were unimaginable, opening an opportunity to revolutionize our biological understanding. As extracting information from cryo-EM experiments completely relies on mathematical algorithms, the method’s deep mathematical challenges that have emerged must be solved as soon as possible. Only then cryo-EM could realize its nearly inconceivable potential. These challenges, for which no adequate solutions exist (or none at all), focus on integrating information from huge sets of extremely noisy images reliability and efficiently. Based on the experience of my research group in developing algorithms for cryo-EM data processing, gained during the past eight years, we will address the three key open challenges of the field – a) deriving reliable and robust reconstruction algorithms from cryo-EM data, b) developing tools to process heterogeneous cryo-EM data sets, and c) devising validation and quality measures for structures determined from cryo-EM data. The fourth goal of the project, which ties all goals together and promotes the broad interdisciplinary impact of the project, is to merge all our algorithms into a software platform for state-of-the-art processing of cryo-EM data.
Max ERC Funding
1 751 250 €
Duration
Start date: 2017-03-01, End date: 2022-02-28
Project acronym CYFI
Project Cycle-Sculpted Strong Field Optics
Researcher (PI) Andrius Baltuska
Host Institution (HI) TECHNISCHE UNIVERSITAET WIEN
Call Details Starting Grant (StG), PE2, ERC-2011-StG_20101014
Summary The past decade saw a remarkable progress in the development of attosecond technologies based on the use of intense few-cycle optical pulses. The control over the underlying single-cycle phenomena, such as the higher-order harmonic generation by an ionized and subsequently re-scattered electronic wave packet, has become routine once the carrier-envelope phase (CEP) of an amplified laser pulse was stabilized, opening the way to maintain the shot-to-shot reproducible pulse electric field. Drawing on a mix of several laser technologies and phase-control concepts, this proposal aims to take strong-field optical tools to a conceptually new level: from adjusting the intensity and timing of a principal half-cycle to achieving a full-fledged multicolor Fourier synthesis of the optical cycle dynamics by controlling a multi-dimensional space of carrier frequencies, relative, and absolute phases. The applicant and his team, through their unique expertise in the CEP control and optical amplification methods, are currently best positioned to pioneer the development of an optical programmable “attosecond optical shaper” and attain the relevant multicolor pulse intensity levels of PW/cm2. This will enable an immediate pursuit of several exciting strong-field applications that can be jump-started by the emergence of a technique for the fully-controlled cycle sculpting and would rely on the relevant experimental capabilities already established in the applicant’s emerging group. We show that even the simplest form of an incommensurate-frequency synthesizer can potentially solve the long-standing debate on the mechanism of strong-field rectification. More advanced waveforms will be employed to dramatically enhance coherent X ray yield, trace the time profile of attosecond ionization in transparent bulk solids, and potentially control the result of molecular dissociation by influencing electronic coherences in polyatomic molecules.
Summary
The past decade saw a remarkable progress in the development of attosecond technologies based on the use of intense few-cycle optical pulses. The control over the underlying single-cycle phenomena, such as the higher-order harmonic generation by an ionized and subsequently re-scattered electronic wave packet, has become routine once the carrier-envelope phase (CEP) of an amplified laser pulse was stabilized, opening the way to maintain the shot-to-shot reproducible pulse electric field. Drawing on a mix of several laser technologies and phase-control concepts, this proposal aims to take strong-field optical tools to a conceptually new level: from adjusting the intensity and timing of a principal half-cycle to achieving a full-fledged multicolor Fourier synthesis of the optical cycle dynamics by controlling a multi-dimensional space of carrier frequencies, relative, and absolute phases. The applicant and his team, through their unique expertise in the CEP control and optical amplification methods, are currently best positioned to pioneer the development of an optical programmable “attosecond optical shaper” and attain the relevant multicolor pulse intensity levels of PW/cm2. This will enable an immediate pursuit of several exciting strong-field applications that can be jump-started by the emergence of a technique for the fully-controlled cycle sculpting and would rely on the relevant experimental capabilities already established in the applicant’s emerging group. We show that even the simplest form of an incommensurate-frequency synthesizer can potentially solve the long-standing debate on the mechanism of strong-field rectification. More advanced waveforms will be employed to dramatically enhance coherent X ray yield, trace the time profile of attosecond ionization in transparent bulk solids, and potentially control the result of molecular dissociation by influencing electronic coherences in polyatomic molecules.
Max ERC Funding
980 000 €
Duration
Start date: 2012-01-01, End date: 2015-06-30
Project acronym DeepFace
Project Understanding Deep Face Recognition
Researcher (PI) Lior Wolf
Host Institution (HI) TEL AVIV UNIVERSITY
Call Details Consolidator Grant (CoG), PE6, ERC-2016-COG
Summary Face recognition is a fascinating domain: no other domain seems to present as much value when analysing casual photos; it is one of the few domains in machine learning in which millions of classes are routinely learned; and the trade-off between subtle inter-identity variations and pronounced intra-identity variations forms a unique challenge.
The advent of deep learning has brought machines to what is considered a human level of performance. However, there are many research questions that are left open. At the top most level, we ask two questions: what is unique about faces in comparison to other recognition tasks that also employ deep networks and how can we make the next leap in performance of automatic face recognition?
We consider three domains of research. The first is the study of methods that promote effective transfer learning. This is crucial since all state of the art face recognition methods rely on transfer learning. The second domain is the study of the tradeoffs that govern the optimal utilization of the training data and how the properties of the training data affect the optimal network design. The third domain is the post transfer utilization of the learned deep networks, where given the representations of a pair of face images, we seek to compare them in the most accurate way.
Throughout this proposal, we put an emphasis on theoretical reasoning. I aim to support the developed methods by a theoretical framework that would both justify their usage as well as provide concrete guidelines for using them. My goal of achieving a leap forward in performance through a level of theoretical analysis that is unparalleled in object recognition, makes our research agenda truly high-risk/ high-gains. I have been in the forefront of face recognition for the last 8 years and my lab's recent achievements in deep learning suggest that we will be able to carry out this research. To further support its feasibility, we present very promising initial results.
Summary
Face recognition is a fascinating domain: no other domain seems to present as much value when analysing casual photos; it is one of the few domains in machine learning in which millions of classes are routinely learned; and the trade-off between subtle inter-identity variations and pronounced intra-identity variations forms a unique challenge.
The advent of deep learning has brought machines to what is considered a human level of performance. However, there are many research questions that are left open. At the top most level, we ask two questions: what is unique about faces in comparison to other recognition tasks that also employ deep networks and how can we make the next leap in performance of automatic face recognition?
We consider three domains of research. The first is the study of methods that promote effective transfer learning. This is crucial since all state of the art face recognition methods rely on transfer learning. The second domain is the study of the tradeoffs that govern the optimal utilization of the training data and how the properties of the training data affect the optimal network design. The third domain is the post transfer utilization of the learned deep networks, where given the representations of a pair of face images, we seek to compare them in the most accurate way.
Throughout this proposal, we put an emphasis on theoretical reasoning. I aim to support the developed methods by a theoretical framework that would both justify their usage as well as provide concrete guidelines for using them. My goal of achieving a leap forward in performance through a level of theoretical analysis that is unparalleled in object recognition, makes our research agenda truly high-risk/ high-gains. I have been in the forefront of face recognition for the last 8 years and my lab's recent achievements in deep learning suggest that we will be able to carry out this research. To further support its feasibility, we present very promising initial results.
Max ERC Funding
1 696 888 €
Duration
Start date: 2017-05-01, End date: 2022-04-30
Project acronym DIASPORAINTRANSITION
Project A Diaspora in Transition - Cultural and Religious Changes in Western Sephardic Communities in the Early Modern Period
Researcher (PI) Yosef Mauricio Kaplan
Host Institution (HI) THE HEBREW UNIVERSITY OF JERUSALEM
Call Details Advanced Grant (AdG), SH6, ERC-2011-ADG_20110406
Summary The communities of the Western Sephardic Diaspora were founded in the 16th and 17th centuries by New Christians from Iberia who returned to Judaism that had been abandoned by their ancestors in the late Middle Ages. This project will concentrate on the changes in the religious conceptions and behavior as well as the cultural patterns of the communities of Amsterdam, Hamburg, Leghorn, London, and Bordeaux. We will analyze the vigorous activity of their leaders to set the boundaries of their new religious identity in comparison to the policy of several Christian “communities of belief,” which went into exile following religious persecution in their homelands. We will also examine the changes in the attitude toward Judaism during the 17th century in certain segments of the Sephardic Diaspora: rather than a normative system covering every area of life, Judaism came to be seen as a system of faith restricted to the religious sphere. We will seek to explain the extent to which this significant change influenced their institutions and social behaviour. This study will provide us with better understanding of the place of the Jews in European society. At the same time, we will subject a central series of concepts in the historiographical discourse of the Early Modern Period to critical analysis: confessionalization, disciplinary revolution, civilizing process, affective individualism, etc. This phase of the research will be based on qualitative and quantitative analysis of many hundreds of documents, texts and the material remains of these communities. Using sociological and anthropological models, we will analyze ceremonies and rituals described at length in the sources, the social and cultural meaning of the architecture of the Sephardic synagogues of that time, and of other visual symbols.
Summary
The communities of the Western Sephardic Diaspora were founded in the 16th and 17th centuries by New Christians from Iberia who returned to Judaism that had been abandoned by their ancestors in the late Middle Ages. This project will concentrate on the changes in the religious conceptions and behavior as well as the cultural patterns of the communities of Amsterdam, Hamburg, Leghorn, London, and Bordeaux. We will analyze the vigorous activity of their leaders to set the boundaries of their new religious identity in comparison to the policy of several Christian “communities of belief,” which went into exile following religious persecution in their homelands. We will also examine the changes in the attitude toward Judaism during the 17th century in certain segments of the Sephardic Diaspora: rather than a normative system covering every area of life, Judaism came to be seen as a system of faith restricted to the religious sphere. We will seek to explain the extent to which this significant change influenced their institutions and social behaviour. This study will provide us with better understanding of the place of the Jews in European society. At the same time, we will subject a central series of concepts in the historiographical discourse of the Early Modern Period to critical analysis: confessionalization, disciplinary revolution, civilizing process, affective individualism, etc. This phase of the research will be based on qualitative and quantitative analysis of many hundreds of documents, texts and the material remains of these communities. Using sociological and anthropological models, we will analyze ceremonies and rituals described at length in the sources, the social and cultural meaning of the architecture of the Sephardic synagogues of that time, and of other visual symbols.
Max ERC Funding
1 671 200 €
Duration
Start date: 2012-03-01, End date: 2018-02-28
