FD HOLOG · Strongly Coupled Gauge Theories at Finite Density
FP7 — People (Marie Curie Actions)
- Duration
- 2009-11-01 → 2011-10-31
- EU contribution
- €135,876
- Participants
- 1
- Scheme
- MC-IIF
Lines connect the coordinator with its partners.
Results in brief
Strongly Coupled Gauge Theories at Finite Density
This project addressed two problems in strongly coupled theories at finite density. The first was implemented in the context of non-relativistic correspondence of the ads/CFT type at finite density. The focus is on the calculation of transport coefficients, like conductivity. Such observables are very important xperimentally in many systems as the capture the response of the medium to small external fields. A new classification of gravitational systems that possess a non-relativistic Schrodinger symmetry was formulated by considering standard metrics written in the light-cone frame. This method allows the fast computation of renormalized correlators and transport coefficients, that are very important in order to characterize the behavior of such systems for applications, especially in condensed matter systems. This was published in arXiv:1008.3286. Its first application, to the physics of strange metals was also done and published in arXiv:1012.3464. The next application involved dimensionally reduced large-N theories with the aim of understanding more complex behavior at strong coupling. Dimensionally reduced effective actions for QCD and theories alike have been analyzed. In particular, the reduction of a spatial direction with periodic boundary condition on the fermions was examined. The aim of this project was to construct dimensionally reduced effective actions of QCD-like theories with one compactified direction. When the compact direction is the time axis, this is the well-known high-temperature 3d effective action. The interest here is in compactifying the theories on a spatial direction. The difference is that we can impose periodic boundary condition on the fermions and the resulting effective action contains fermions, unlike the case with high temperature. The motivation comes from the studies of adjoint QCD which contains fermions in adjoint representation.
Data: CORDIS, © European Union
Project objective
We propose to study strongly coupled gauge theories at finite density by utilizing holography. This is important and interesting because the holographic techniques are powerful and efficient tools to investigate into the areas of gauge theories which have previously been not possible. Non-abelian gauge theories, such as QCD, at low energy is notoriously difficult to examine analytically because the interaction becomes strong and the best hope of the present is the numerical lattice studies. However, the theories at finite density is currently not accessible even by lattice simulations due to technical problems. Therefore, the properties of QCD at observationally relevant density are largely unknown. The holographic techniques allow us to investigate into such regimes of the gauge theories and the consequences have extensive impact from nuclear physics to condensed matter physics. The members of the host institute and the researcher have just right complementary expertise and skills to undertake this project. Especially, one of the frame works proposed is initiated by the host scientist in charge and thus successful execution of the proposal would certainly result in the mutual benefit and contribute to the European scientific excellence and competitiveness.
Original text from CORDIS.
Participants
- PANEPISTIMIO KRITIS · RETHIMNOCoordinatorGreece
Links
Data: CORDIS, © European Union