Determining the Generalized Temperatures in an Integrable Quantum Quench: Correlation Functions vs Generalized Hydrodynamics

Robert Konik

We consider the problem of determining the generalized temperatures that govern the longtime dynamics after a quantum quench in an integrable model. We demonstrate that these temperatures are in fact embedded in correlation functions and using the fluctuation-dissipation relation can be easily extracted. We consider this in the specific contexts of quenches in the Lieb-Liniger model. We also discuss recent developments where generalized hydrodynamics have been used to to compute the needed correlation functions, obviating the need to deal with unwieldy form factors.

http://scgp.stonybrook.edu/video_portal/video.php?id=3311

Simons- Program: Hydrodynamics, ergodicity, entanglement and localization in interacting lattice models and field theories