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Entangled three-particle states in magnetic field: periodic correlations and density matrices

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Abstract

We present a novel study of the time evolutions of entangled states of three spin-1/2 particles in the presence of a constant external magnetic field, which causes the individual spins to precess and leads to remarkable periodicities in the correlations and density matrices. The emerging patterns of periodicity are studied explicitly for different entangled states and in detail for a particular initial configuration of the velocities. Contributions to precession of anomalous magnetic moments are analysed and general results are also obtained. We then introduce an electric field orthogonal to the magnetic field, linking to the preceding case via a suitable Lorentz transformation, and obtain the corresponding Wigner rotations of the spin states. Finally, we point out for the first time that the entangled states corresponding to well-known ones in the study of 3-particle entanglements, may be classified systematically using a particular coupling of three angular momenta.

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Authors and Affiliations

  1. Centre de Physique Théorique, École Polytechnique, 91128, Palaiseau Cedex, France

    Amitabha Chakrabarti

  2. Laboratoire de Mathématiques Appliquées aux Systèmes, École Centrale Paris, 92290, Châtenay-Malabry, France

    Anirban Chakraborti

Authors
  1. Amitabha Chakrabarti
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  2. Anirban Chakraborti
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Correspondence to Anirban Chakraborti.

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Chakrabarti, A., Chakraborti, A. Entangled three-particle states in magnetic field: periodic correlations and density matrices. Indian J Phys 86, 791–800 (2012). https://doi.org/10.1007/s12648-012-0119-x

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  • DOI: https://doi.org/10.1007/s12648-012-0119-x

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