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Spin relaxation in terms of thermo field dynamics

Author

Listed:
  • Tominaga, T.
  • Ban, M.
  • Arimitsu, T.
  • Pradko, J.
  • Umezawa, H.

Abstract

An axiomatic formulation of the thermo field dynamics (TFD) for spin systems is performed, and is applied to the relaxation process of single spin-12. The spin relaxation accompanied with a change of symmetry of the system is also investigated. The time evolution of an order parameter is obtained within the semi-free approximation.

Suggested Citation

  • Tominaga, T. & Ban, M. & Arimitsu, T. & Pradko, J. & Umezawa, H., 1988. "Spin relaxation in terms of thermo field dynamics," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 149(1), pages 26-48.
    • Handle: RePEc:eee:phsmap:v:149:y:1988:i:1:p:26-48
    DOI: 10.1016/0378-4371(88)90207-5
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    References listed on IDEAS

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    1. Arimitsu, T. & Pradko, J. & Umezawa, H., 1986. "Generating functional methods in non-equilibrium thermo field dynamics," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 135(2), pages 487-504.
    2. Arimitsu, T. & Guida, M. & Umezawa, H., 1988. "Dissipative quantum field theory -thermo field dynamics-," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 148(1), pages 1-26.
    3. Arimitsu, T. & Umezawa, H. & Yamanaka, Y. & Papastamatiou, N.J., 1988. "Spontaneous creation of dissipation in thermo field dynamics and its examples," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 148(1), pages 27-45.
    4. Tominaga, T. & Arimitsu, T. & Pradko, J. & Umezawa, H., 1988. "A derivation of the laser master equation in terms of thermo field dynamics," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 150(1), pages 97-117.
    5. Arimitsu, T. & Sudo, Y. & Umezawa, H., 1987. "Dynamical rearrangement of the thermal vacuum in thermo field dynamics," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 146(3), pages 433-451.
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    1. Tominaga, T. & Arimitsu, T. & Pradko, J. & Umezawa, H., 1988. "A derivation of the laser master equation in terms of thermo field dynamics," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 150(1), pages 97-117.

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