Please use this identifier to cite or link to this item: https://ir.swu.ac.th/jspui/handle/123456789/12254
ชื่อเรื่อง: Evolution processes of coupled thermal qubits
ผู้แต่ง: Chatchawaltheerat T.
Khemmani S.
Poulter J.
Keywords: Speed
Born-Markov approximation
Double cusp behaviour
Markovian
Speed limit
Speed up
Qubits
วันที่เผยแพร่: 2019
บทคัดย่อ: We investigate the quantum speed limit time (QSLT) of quantum evolution before thermal equilibrium of two coupled qubits each of which is coupled to a separate thermal bath at the same temperature within the Born-Markov approximation. The evolution process in one particular initial state can change between speed-up and speed-down two times before reaching equilibrium. We call this double cusp behaviour. This behaviour is an anomalous phenomenon in evolution processes in the weak-coupling Markovian regime. We study QSLT corresponding to all pure initial energy eigenstates and categorise them. In addition, we also display the conditions for double cusp behaviour in terms of temperature, qubit interaction and frequency. © 2019 Elsevier B.V.
URI: https://ir.swu.ac.th/jspui/handle/123456789/12254
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85070863237&doi=10.1016%2fj.physleta.2019.125882&partnerID=40&md5=ef23fdc5b511fb5378f0f700b89d6e0b
ISSN: 3759601
Appears in Collections:Scopus 1983-2021

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