ERC FUNDED PROJECTS

Low-temperature studies of transition metal doped III-V and II-VI compounds carried out over the last decade have demonstrated the unprecedented opportunity offered by these systems for exploring physical phenomena and device concepts in previously unavailable combinations of quantum structures and ferromagnetism in semiconductors. The work proposed here aims at combining and at advancing epitaxial methods, spatially-resolved nano-characterisation tools, and theoretical modelling in order to understand the intricate interplay between carrier localisation, magnetism, and magnetic ion distribution in DMS, and to develop functional DMS structures. To accomplish these goals we will take advantage of two recent breakthroughs in materials engineering. First, the attainment of high-k oxides makes now possible to generate interfacial hole densities up to 10^21 cm-3. We will exploit gated thin layers of DMS phosphides, nitrides, and oxides, in which hole delocalization and thus high temperature ferromagnetism is to be expected under gate bias. Furthermore we will systematically investigate how the Curie temperature of (Ga,Mn)As can be risen above 180 K. Second, the progress in nanoscale chemical analysis has allowed demonstrating that high temperature ferromagnetism of semiconductors results from nanoscale crystallographic or chemical phase separations into regions containing a large concentration of the magnetic constituent. We will elaborate experimentally and theoretically epitaxy and co-doping protocols for controlling the self-organised growth of magnetic nanostructures, utilizing broadly synchrotron radiation and nanoscopic characterisation tools. The established methods will allow us to obtain on demand either magnetic nano-dots or magnetic nano-columns embedded in a semiconductor host, for which we predict, and will demonstrate, ground-breaking functionalities. We will also assess reports on the possibility of high-temperature ferromagnetism without magnetic ions.

2 440 000 €

Start date: 2009-01-01, End date: 2013-12-31

We apply for financial support for the new, fourth phase of the Optical Gravitational Lensing Experiment (OGLE-IV) - one of the largest scale sky surveys worldwide, operating continuously since 1992. During its operation the OGLE project contributed significantly to many fields of modern astrophysics including gravitational microlensing, extrasolar planets searches, stellar astrophysics, Galactic structure and many others. The main scientific goal of the OGLE-IV phase will be the second generation planetary microlensing survey. It should result in top rank discoveries of the Earth mass planets and should provide the full census of planets down to Earth masses orbiting their hosts at 1-5 AU orbits. This parameter space is only accessible to the microlensing technique. Complementary census of planets orbiting at the distances smaller that 1 AU is to be made by space missions using transit technique. OGLE-IV survey will also conduct research in many other top rank astrophysical topics like the search for Pluto size dwarf planets from the Kuiper Belt, search for free-floating black holes, microlensing in the Magellanic Clouds and Galactic disk. Hundreds of new discoveries in the variable star field are also guaranteed. Moreover, OGLE-IV will operate on-line services providing real time photometry of variable objects of many types. The OGLE-IV data will be placed in public domain and available to the astronomical community.

2 498 000 €

Start date: 2010-01-01, End date: 2014-12-31

"The studies of quantum resources - entanglement (E) and non-locality (NL) carried out over the last decade have broadened horizons of our conceptual understanding of Nature and at the same time opened unprecedented possibilities for practical applications. The project aims at taking advantage of the most recent discoveries to understand the ultimate power and find novel applications of these resources. The main objectives are: E) to study novel entanglement-induced non-additivity effects in quantum communication and application of mixed state entanglement to quantum metrology NL) to recognize the influence of information causality on the power of quantum non-locality and verify the power of non-locality, and more generally – contextuality – for quantum computational speed-up. In particular, it is planned: E) to find new non-additivities by providing explicit constructions of bipartite channels, broadcast channels and quantum networks; to demonstrate experimentally non-additivity effects; to provide experimentally friendly entanglement measures in quantum networks; to analyse entanglement-enhanced metrology in presence of decoherence NL) to determine to what extent information-causality reproduces quantum mechanics; to generalize information causality to multipartite systems; to provide new fundamental information-theoretical principles behind quantum mechanics; to quantify and classify contextuality; to design and analyse multiparty non-local systems independently of quantum mechanics; to verify their usefulness for communication and computational tasks. We shall extensively exploit multiple interrelations between these two aspects of quantum physics. The results of theoretical investigations will be implemented in labs by experimental partners. In particular, we plan pioneering implementations of quantum channel non-additivity effects. The proposed research lines will bring ground-breaking results for quantum information processing."

1 970 380 €

Start date: 2012-01-01, End date: 2016-12-31