Please use this identifier to cite or link to this item: https://doi.org/10.1103/PhysRevA.87.042102
Title: Wigner rotations and an apparent paradox in relativistic quantum information
Authors: Saldanha, P.L.
Vedral, V. 
Issue Date: 3-Apr-2013
Citation: Saldanha, P.L., Vedral, V. (2013-04-03). Wigner rotations and an apparent paradox in relativistic quantum information. Physical Review A - Atomic, Molecular, and Optical Physics 87 (4) : -. ScholarBank@NUS Repository. https://doi.org/10.1103/PhysRevA.87.042102
Abstract: It is shown that a general model for particle detection in combination with a linear application of the Wigner rotations, which correspond to momentum-dependent changes of the particle spin under Lorentz transformations, to the state of a massive relativistic particle in a superposition of two counterpropagating momentum states leads to a paradox. The paradox entails the instantaneous transmission of information between two spatially separated parties. A solution to the paradox is given when the physical construction of the corresponding state is taken into account, suggesting that we cannot in general linearly apply the Wigner rotations to a quantum state without considering the appropriate physical interpretation. © 2013 American Physical Society.
Source Title: Physical Review A - Atomic, Molecular, and Optical Physics
URI: http://scholarbank.nus.edu.sg/handle/10635/98587
ISSN: 10502947
DOI: 10.1103/PhysRevA.87.042102
Appears in Collections:Staff Publications

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