Spatial Localization and Relativistic Transformation of Quantum Spins

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dc.creatorLi, Hui
dc.creatorDu, Jiangfeng
dc.date2003-09-19
dc.date2004-07-30
dc.date.accessioned2026-07-07T06:07:52Z
dc.date.available2026-07-07T06:07:52Z
dc.descriptionThe purity of a reduced state for spins that is pure in the rest frame will most likely appear to degrade because spin and momentum become mixed when viewed by a moving observer. We show that such a boost-induced decrease in spin purity observed in a moving reference frame is intrinsically related to the spatial localization properties of the wave package observed in the rest frame. Furthermore, we prove that, for any localized pure state with separable spin and momentum in the rest frame, its reduced density matrix for spins inevitably appears to be mixed whenever viewed from a moving reference frame.
dc.description5 pages, 1 figure
dc.identifierhttps://arxiv.org/abs/quant-ph/0309144
dc.identifierhttp://arxiv.org/abs/quant-ph/0309144
dc.identifierPhys. Rev. A 70, 012111 (2004)
dc.identifierdoi:10.1103/PhysRevA.70.012111
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/91446
dc.subjectQuantum Physics
dc.titleSpatial Localization and Relativistic Transformation of Quantum Spins
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