Singularity in entanglement negativity across finite-temperature phase transitions
Tsung-Cheng LuDepartment of Physics, University of California at San Diego, La Jolla, California 92093, USATarun GroverDepartment of Physics, University of California at San Diego, La Jolla, California 92093, USA
2019en
ABI
Abstract
Phase transitions at a finite (i.e. nonzero) are typically driven by classical fluctuations, as opposed to those at zero temperature where quantum mechanics plays an essential role. Motivated by this observation, here we ask whether there exist any universal signatures of quantum correlations across a finite temperature phase transition? In this work, we approach this question by investigating one measure of quantum correlations at finite temperature, called `entanglement negativity', in several models that exhibit phase transition.
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Cited by 20 references