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Physical interpretation of the Wigner rotations and its implications for relativistic quantum information

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 ...

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Publication status:
Published
Peer review status:
Peer reviewed
Version:
Publisher's version

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Publisher copy:
10.1088/1367-2630/14/2/023041

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Institution:
University of Oxford
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Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, REF-Physics
Publisher:
IOP Publishing Publisher's website
Journal:
New Journal of Physics Journal website
Volume:
14
Issue:
2
Pages:
Article: 023041
Publication date:
2012-02-05
DOI:
EISSN:
1367-2630
ISSN:
1367-2630
URN:
uuid:e1bd90c1-859e-4650-bd30-1cfbb013e1a8
Source identifiers:
320710
Local pid:
pubs:320710
Language:
English

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