We show that the mean-field time-dependent equations in the 8 4 theory can be put into a classical noncanonical Hamiltonian framework with a Poisson structure which is a generalization of the standard Poisson bracket. The Heisenberg invariant appears as a structural invariant of the Poisson tensor.
On the Poisson Structure of the Time-Dependent Mean-Field Equations For Systems of Bosons out of Equilibrium
β Scribed by Mohamed Benarous
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- English
- Weight
- 208 KB
- Volume
- 264
- Category
- Article
- ISSN
- 0003-4916
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β¦ Synopsis
We analyze the Poisson structure of the time-dependent meanfield equations for condensed bosons and construct the Lie Poisson bracket associated to these equations. The latter follow from the time-dependent variational principle of Balian and Ve ne roni when a Gaussian Ansatz is chosen for the density operator. We perform a stability analysis of both the full and the linearized equations. We also search for canonically conjugate variables. In certain cases, the evolution equations can indeed be cast in a Hamiltonian form.
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