Stationary states of two-level open quantum systems

Gardas, Bartłomiej; Puchała, Zbigniew

doi:10.1088/1751-8113/44/21/215306

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Cited by 3 publications

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“…In particular, if |ψ = |ψ n then both α(t) and c(t) does not depend on time. The latter observation is in perfect agreement with the results regarding stationary states reported in [24].…”

Section: Generalizationsupporting

confidence: 92%

Initial states of qubit–environment models leading to conserved quantities

Gardas¹,

Dajka²

2013

J. Phys. A: Math. Theor.

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Abstract. It is possible to prepare a composite qubit-environment system so that its time evolution will guarantee the conservation of a preselected qubit's observable. In general, this observable is not associated with a symmetry. The latter may not even be present in the subsystem. The initial states which lead to such a quantity conserved dynamics form a subspace of the qubit-environment space of states. General construction of this subspace is presented and illustrated by two examples. The first one is the exactly soluble Jaynes-Cummings model and the second is the multi-photon Rabi model.

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Section: Generalizationsupporting

confidence: 92%