ERC FUNDED PROJECTS

This project focuses on the appropriation of the Old Testament by early Christian interpreters of the Bible. A historical approach, not commonly adopted in the study of biblical interpretation, will enable us to study how this process contributed to the formation of distinctive Christian identities within the multicultural society of the late Roman principate and early Byzantine rule. The exegetes of this period were to a great extent responsible for the creation of a distinctive, sophisticated, and uncompromising discourse—a ‘totalising Christian discourse’, which determines Christian identities up to this day. In two projects, carried out by three researchers, we will make cross sections of the relevant material. It was allegorizing interpretation that enabled exegetes belonging to the so-called School of Alexandria to recognize Christ everywhere in the Old Testament, and thus to appropriate it and make it useful to the Church. Thus the Song of Songs was no longer considered an earthly love song, but was said to describe Christ’s love for the Church. Exegetes associated with the School of Antioch opposed to this kind of approach. They are often described as literalists. The traditional understanding of the distinctions between the two schools needs to be broadened and corrected by a picture of the actual practice of their hermeneutics. In my view the Antiochene opposition was brought about by the fact that pagan and ‘heretic’ critics did not accept the Alexandrian use of allegory. My innovative hypothesis is related to the central role played by the letters of the apostle Paul in the Antiochene reaction against Alexandria. For the Antiochenes, the use of Paul became an alternative means to bridge the gap between the two Testaments. Instead of a book in which every jot and tittle referred to Christ through allegory, the Antiochenes came to view the Old Testament as an amalgamation of moral lessons that agreed with Paul's teaching.

655 309 €

Start date: 2008-09-01, End date: 2013-12-31

Macroscopic control of quantum states is a major theme in much of modern physics because quantum coherence enables study of fundamental physics and has promising applications for quantum information processing. The potential significance of quantum computing is recognized well beyond the physics community. For electron spins in GaAs quantum dots, it has become clear that decoherence caused by interactions with the nuclear spins is a major challenge. We propose to investigate and reduce hyperfine induced decoherence with two complementary approaches: nuclear spin state narrowing and nuclear spin polarization. We propose a new projective state narrowing technique: a large, Coulomb blockaded dot measures the qubit nuclear ensemble, resulting in enhanced spin coherence times. Further, mediated by an interacting 2D electron gas via hyperfine interaction, a low temperature nuclear ferromagnetic spin state was predicted, which we propose to investigate using a quantum point contact as a nuclear polarization detector. Estimates indicate that the nuclear ferromagnetic transition occurs in the sub-Millikelvin range, well below already hard to reach temperatures around 10 mK. However, the exciting combination of interacting electron and nuclear spin physics as well as applications in spin qubits give ample incentive to strive for sub-Millikelvin temperatures in nanostructures. We propose to build a novel type of nuclear demagnetization refrigerator aiming to reach electron temperatures of 0.1 mK in semiconductor nanostructures. This interdisciplinary project combines Microkelvin and nanophysics, going well beyond the status quo. It is a challenging project that could be the beginning of a new era of coherent spin physics with unprecedented quantum control. This project requires a several year commitment and a team of two graduate students plus one postdoctoral fellow.

1 377 000 €

Start date: 2008-06-01, End date: 2013-05-31

Developmental biology seeks not only to learn more about the fundamental processes of growth and pattern per se, but to understand how they synergize to enable the morphogenesis of multicellular organisms. Our goal is to perform real-time analyses of these developmental processes in an intact developing organ. By applying a vital imaging approach, we can circumvent the normal limitations of inferring cellular dynamics from static images or molecular data, and obtain the real dynamic view of growth and patterning. The wing imaginal disc of Drosophila, which starts out as a simple epithelial structure and gives rise to a precisely structured adult limb, will serve as an ideal model system. This system has the combined advantages of relative simplicity and genetic tractability. We will create several innovations that expand the current toolkit and thus facilitate the detailed dissection of growth and patterning. A key early step will be to develop novel reporters to dynamically and faithfully monitor signaling cascades involved in growth and patterning, such as the Dpp and Hippo pathways. We will also implement quantification techniques that are currently being set up in collaboration with an experimental physicist, to deduce, and alter, the mechanical forces that develop in the cells of a growing tissue. The large amount of quantitative data that will be generated allow us derive computational models of the individual pathways and their interaction. The focus of the study will be to answer the following questions: 1) Is the Hippo pathway regulated spatially and temporally, and by what signaling pathways? 2) Do mechanical forces play a pivotal controlling role in organ morphogenesis? 3) What are the global effects on growth, when pathways controlling patterning, cell competition or compensatory proliferation are perturbed? The proposed project will bring the approaches taken to define the mechanisms underlying and controlling growth and patterning to the next level.

2 310 000 €

Start date: 2009-02-01, End date: 2014-01-31

The purpose of this proposal is to investigate from various perspectives some equidistribution problems associated with homogeneous spaces of arithmetic type: a typical problem (basically solved) is the distribution of the set of representations of a large integer by an integral quadratic form. Another harder problem is the study of the distribution of special points on Shimura varieties. In a different direction (linked with quantum chaos), the study of the concentration of Laplacian (Maass) eigenforms or of sections of holomorphic bundles is related to similar problems. Given X such a space and G>L the underlying algebraic group and its corresponding lattice L, the above questions boil down to studying the distribution of H-orbits x.H (or more generally H-invariant measures)on the quotient L\G for some subgroups H. This question may be studied different methods: Harmonic Analysis (HA): given a function f on L\G one studies the period integral of f along x.H. This may be done by automorphic methods. In favorable circumstances, the above periods are related to L-functions which one may hope to treat by methods from analytic number theory (the subconvexity problem). Ergodic Theory (ET): one studies the properties of weak*-limits of the measures supported by x.H using rigidity techniques: depending on the nature of H, one might use either rigidity of unipotent actions or the more recent rigidity results for torus actions in rank >1. In fact, HA and ET are intertwined and complementary : the use of ET in this context require a substantial input from number theory and HA, while ET lead to a soft understanding of several features of HA. In addition, the Langlands correspondence principle make it possible to pass from one group G to another. Based on earlier experience, our goal is to develop these interactions systematically and to develop new approaches to outstanding arithmetic problems :eg. the subconvexity problem or the Andre/Oort conjecture.

866 000 €

Start date: 2008-12-01, End date: 2013-11-30