PT-symmetric slowing down of decoherence

Gardas, Bartlomiej; Deffner, Sebastian; Saxena, Avadh Behari

doi:10.1103/PhysRevA.94.040101

Title: $PT$ -symmetric slowing down of decoherence

Journal Article · Thu Oct 27 00:00:00 EDT 2016 · Physical Review A

DOI:https://doi.org/10.1103/PhysRevA.94.040101· OSTI ID:1345161

Gardas, Bartlomiej ^[1]; Deffner, Sebastian ^[2];

^[3]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Univ. of Silesia, Katowice (Poland)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Univ. of Maryland Baltimore County, Baltimore, MD (United States)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Here, we investigate $PT$ -symmetric quantum systems ultraweakly coupled to an environment. We find that such open systems evolve under $PT$ -symmetric, purely dephasing and unital dynamics. The dynamical map describing the evolution is then determined explicitly using a quantum canonical transformation. Furthermore, we provide an explanation of why $PT$ -symmetric dephasing-type interactions lead to a critical slowing down of decoherence. This effect is further exemplified with an experimentally relevant system, a $PT$ -symmetric qubit easily realizable, e.g., in optical or microcavity experiments.

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Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC52-06NA25396

OSTI ID:: 1345161

Alternate ID(s):: OSTI ID: 1330292

Report Number(s):: LA-UR-16-25203; PLRAAN; TRN: US1701323

Journal Information:: Physical Review A, Vol. 94, Issue 4; ISSN 2469-9926

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 27 works

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