Symmetry breaking and fluctuations within stochastic mean-field dynamics: importance of initial quantum fluctuations - IN2P3 - Institut national de physique nucléaire et de physique des particules
Journal Articles Physical Review C Year : 2012

Symmetry breaking and fluctuations within stochastic mean-field dynamics: importance of initial quantum fluctuations

D. Lacroix
S. Ayik
  • Function : Author
B. Yilmaz
  • Function : Author

Abstract

Dynamics of spontaneous symmetry breaking and fluctuations in the Lipkin-Meshkov-Glick model are investigated in a stochastic mean-field approach. Different from the standard mean-field, in the stochastic approach, initial state fluctuations, are incorporated. In weak coupling, the approach perfectly reproduces the exact quantal dynamics. On the other hand, for increasing coupling strength, above the symmetry breaking threshold, the approach provides description of gross properties (i.e. time averaged behavior) of the exact quantal evolution.

Dates and versions

in2p3-00679661 , version 1 (19-03-2012)

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Cite

D. Lacroix, S. Ayik, B. Yilmaz. Symmetry breaking and fluctuations within stochastic mean-field dynamics: importance of initial quantum fluctuations. Physical Review C, 2012, 85, pp.041602. ⟨10.1103/PhysRevC.85.041602⟩. ⟨in2p3-00679661⟩
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