Decoherence of topological qubit in linear and circular motions: decoherence impedance, anti-Unruh and information backflow

Pei Hua Liu, Feng Li Lin

研究成果: 雜誌貢獻文章

2 引文 斯高帕斯(Scopus)

摘要

Abstract: In this paper, we consider the decoherence patterns of a topological qubit made of two Majorana zero modes in the generic linear and circular motions in the Minkowski spacetime. We show that the reduced dynamics is exact without Markov approximation. Our results imply that the acceleration will cause thermalization as expected by Unruh effect. However, for the short-time scale, we find the rate of decoherence is anti-correlated with the acceleration, as kind of decoherence impedance. This is in fact related to the “anti-Unruh” phenomenon previously found by studying the transition probability of Unruh-DeWitt detector. We also obtain the information backflow by some time modulations of coupling constant or acceleration, which is a characteristic of the underlying non-Markovian reduced dynamics. Moreover, by exploiting the nonlocal nature of the topological qubit, we find that some incoherent accelerations of the constituent Majorana zero modes can preserve the coherence instead of thermalizing it.

原文英語
文章編號84
期刊Journal of High Energy Physics
2016
發行號7
DOIs
出版狀態已發佈 - 2016 七月 1

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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