Locating quantum critical points with Kibble-Zurek quenches

Autor:	Białończyk, Michał, Damski, Bogdan
Rok vydání:	2020
Předmět:	Condensed Matter - Statistical Mechanics Condensed Matter - Quantum Gases Quantum Physics
Zdroj:	Phys. Rev. B 102, 134302 (2020)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.102.134302
Popis:	We describe a scheme for finding quantum critical points based on studies of a non-equilibrium susceptibility during finite-rate quenches taking the system from one phase to another. We assume that two such quenches are performed in opposite directions, and argue that they lead to formation of peaks of a non-equilibrium susceptibility on opposite sides of a critical point. Its position is then narrowed to the interval marked off by these values of the parameter driving the transition, at which the peaks are observed. Universal scaling with the quench time of precision of such an estimation is derived and verified in two exactly solvable models. Experimental relevance of these results is expected. Comment: 9 pages, expanded discussion, added references
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2007.04991 Zobrazit plný text záznamu View this record from Arxiv