Evolution of a quantum spin system to its ground state: Role of entanglement and interaction symmetry

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dc.creatorYuan, S.
dc.creatorKatsnelson, M. I.
dc.creatorDe Raedt, H.
dc.date2007-01-19
dc.date2007-03-29
dc.date.accessioned2026-07-07T08:42:59Z
dc.date.available2026-07-07T08:42:59Z
dc.descriptionWe study the decoherence of two ferro- and antiferromagnetically coupled spins that interact with a frustrated spin-bath environment in its ground state. The conditions under which the two-spin system relaxes from the initial spin-up - spin-down state towards its ground state are determined. It is shown that the two-spin system relaxes to its ground state for narrow ranges of the model parameters only. It is demonstrated that the symmetry of the coupling between the two-spin system and the environment has an important effect on the relaxation process. In particular, we show that if this coupling conserves the magnetization, the two-spin system readily relaxes to its ground state whereas a non-conserving coupling prevents the two-spin system from coming close to its ground state.
dc.descriptionto appear in Phys. Rev. A
dc.identifierhttps://arxiv.org/abs/cond-mat/0701490
dc.identifierhttp://arxiv.org/abs/cond-mat/0701490
dc.identifierPhys. Rev. A 75, 052109 (2007)
dc.identifierdoi:10.1103/PhysRevA.75.052109
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/142162
dc.subjectOther Condensed Matter
dc.subjectQuantum Physics
dc.titleEvolution of a quantum spin system to its ground state: Role of entanglement and interaction symmetry
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