Experimental quantum simulation of superradiant phase transition beyond no-go theorem via antisqueezing.

ABSTRACT: The superradiant phase transition in thermal equilibrium is a fundamental concept bridging statistical physics and electrodynamics, which has never been observed in real physical systems since the first proposal in the 1970s. The existence of this phase transition in cavity quantum electrodynamics systems is still subject of ongoing debates due to the no-go theorem induced by the so-called A² term. Moreover, experimental conditions to study this phase transition are hard to achieve with current accessible technology. Based on the platform of nuclear magnetic resonance, here we experimentally simulate the occurrence of an equilibrium superradiant phase transition beyond no-go theorem by introducing the antisqueezing effect. The mechanism relies on that the antisqueezing effect re

SUBMITTER: Chen X 

PROVIDER: S-EPMC8560888 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature