Conveners
Tuesday PM: 1
- Biagio Lucini (Swansea University)
Tuesday PM: 2
- Seyong Kim (Sejong University)
Dr
Anders Hansen
(DAMTP Cambridge)
02/08/2016, 14:00
Recent developments in the mathematics of inverse problems
Talk
Compressed sensing has had a considerable impact on inverse problems and sampling theory over the last ten years. However, the traditional compressed sensing setup and theory is usually discrete, a fact that may seem at odds with many of the physical models that are over the continuum. In this talk we will discuss how one can design compressed sensing over the continuum and how this approach...
Dr
Hiromichi Nishimura
(RIKEN BNL Research Center)
02/08/2016, 14:45
Quantum Field Theories of dense, cold matter
Talk
We consider the spectrum of transfer matrix eigenvalues associated with Polyakov loops in lattice QCD at strong coupling. The transfer matrix at finite density is non-Hermitian, and its eigenvalues become complex as a manifestation of the sign problem. We show that the global symmetries of finite-density QCD ensure that the complex eigenvalues are part of a complex conjugate pair, and they...
Dr
Keitaro Nagata
(KEK, Theory Center)
02/08/2016, 15:10
Quantum Field Theories of dense, cold matter
Talk
Recently, the complex Langevin method has been applied successfully to finite density QCD either in the deconfinement phase or in the heavy dense limit with the aid of a new technique called the gauge cooling. In the confinement phase with light quarks, however, convergence to wrong limits occurs due to the singularity in the drift term caused by small eigenvalues of the Dirac operator...
Dr
Donald SInclair
(Argonne-Seville)
02/08/2016, 16:05
Quantum Field Theories of dense, cold matter
Talk
We simulate Lattice QCD with 2 light quark flavours at zero temperature and finite quark number chemical potential $\mu$. Gauge cooling is applied, along with adaptive rescaling of the updating `time' increment, to stabilize the algorithm. We see evidence for the expected transition at $\mu \approx m_N/3$ and for saturation at large $\mu$. Limitations of the method are discussed.
Mr
Felipe Attanasio
(Swansea University)
02/08/2016, 16:30
Quantum Field Theories of dense, cold matter
Talk
Complex Langevin simulations have been able to successfully reproduce results from Monte Carlo methods in the region where the sign problem is mild and make predictions when it is exponentially hard. We present here our study of the QCD phase diagram in the limit of heavy and dense quarks (HDQCD) for 3 different lattice volumes and the boundary between the hadronic phase and the quark-gluon...
