Please use this identifier to cite or link to this item: https://doi.org/10.1088/1367-2630/14/2/023041
Title: Physical interpretation of the Wigner rotations and its implications for relativistic quantum information
Authors: Saldanha, P.L.
Vedral, V. 
Issue Date: 2012
Citation: Saldanha, P.L., Vedral, V. (2012). Physical interpretation of the Wigner rotations and its implications for relativistic quantum information. New Journal of Physics 14 : -. ScholarBank@NUS Repository. https://doi.org/10.1088/1367-2630/14/2/023041
Abstract: We present a new treatment for the spin of a massive relativistic particle in the context of quantum information based on a physical interpretation of the Wigner rotations, obtaining different results in relation to previous works. We are led to the conclusion that it is not possible to define a reduced density matrix for the particle spin and that the Pauli-Lubanski (or similar) spin operators are not suitable for describing measurements where the spin couples to an electromagnetic field in the measuring apparatus. These conclusions contradict the assumptions made by most of the previous papers on the subject. We also propose an experimental test of our formulation. © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.
Source Title: New Journal of Physics
URI: http://scholarbank.nus.edu.sg/handle/10635/97546
ISSN: 13672630
DOI: 10.1088/1367-2630/14/2/023041
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