Universal scaling of work statistics in conformal field theory models

Article

关键词: QUANTUM PHASE-TRANSITION;    SUPERFLUID;    DYNAMICS;   

DOI  :  10.1103/PhysRevB.103.144204

来源: SCIE

【 摘 要 】

We systematically study the work statistics for quantum phase transition. For a quantum system approached by an anisotropic conformal field theory near the critical point, the driving protocol is divided into three different regimes for different quench rates, which reflects the competition between the frozen time and the quench timescale. In each regime, we find universal scaling behaviors in work statistics (after renormalization). It is shown that the critical exponents are determined by the space-time dimension d, the dynamical critical exponent z, the correlation-length exponent v, and the power-law protocols. These universal scalings in nonequilibrium processes may be found in quantum phase transition by measuring the Loschmidt echo or the Ramsey interferometry.

【 授权许可】

Free