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

Pei Hua Liu, Feng Li Lin

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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.

Original languageEnglish
Article number84
JournalJournal of High Energy Physics
Issue number7
Publication statusPublished - 2016 Jul 1



  • Black Holes
  • Boundary Quantum Field Theory
  • Quantum Dissipative Systems

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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