Probing Ground-State Phase Transitions through Quench Dynamics.

ABSTRACT: The study of quantum phase transitions requires the preparation of a many-body system near its ground state, a challenging task for many experimental systems. The measurement of quench dynamics, on the other hand, is now a routine practice in most cold atom platforms. Here we show that quintessential ingredients of quantum phase transitions can be probed directly with quench dynamics in integrable and nearly integrable systems. As a paradigmatic example, we study global quench dynamics in a transverse-field Ising model with either short-range or long-range interactions. When the model is integrable, we discover a new dynamical critical point with a nonanalytic signature in the short-range correlators. The location of the dynamical critical point matches that of the quantum critical point a

SUBMITTER: Titum P 

PROVIDER: S-EPMC11670880 | biostudies-literature | 2019 Sep

REPOSITORIES: biostudies-literature