Journal article
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 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.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Version of record, pdf, 533.2KB, Terms of use)
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- Publisher copy:
- 10.1088/1367-2630/14/2/023041
Authors
+ Fundação de Amparo à Ciência e Tecnologia do Estado de Pernambuco
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- Funding agency for:
- Saldanha, P
+ Conselho Nacional de Desenvolvimento Científico e Tecnológico
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- Funding agency for:
- Saldanha, P
+ Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
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- Funding agency for:
- Saldanha, P
- Publisher:
- IOP Publishing
- Journal:
- New Journal of Physics More from this journal
- Volume:
- 14
- Issue:
- 2
- Article number:
- 023041
- Publication date:
- 2012-02-01
- DOI:
- EISSN:
-
1367-2630
- ISSN:
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1367-2630
- Language:
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English
- UUID:
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uuid:e1bd90c1-859e-4650-bd30-1cfbb013e1a8
- Local pid:
-
pubs:320710
- Source identifiers:
-
320710
- Deposit date:
-
2012-12-19
Terms of use
- Copyright holder:
- IOP Publishing Ltd and Deutsche Physikalische Gesellschaft
- Copyright date:
- 2012
- Notes:
- Copyright IOP Publishing Ltd and Deutsche Physikalische Gesellschaft. Authors, their institutions and third parties all have the same rights to reuse articles published in New Journal of Physics in accordance with the Creative Commons Attribution 3.0 Unported (CC-BY) license. This allows the articles to be shared, adapted and made commercial use of subject to appropriate attribution.
- Licence:
- CC Attribution (CC BY)
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