The globally stable solution of a stochastic Nonlinear Schrodinger Equation

Details The globally stable solution of a stochastic Nonlinear Schrodinger Equation The globally stable solution of a stochastic Nonlinear Schrodinger Equation

2008-04-07

arxiv.org/abs/0804.1103v1

Physics

Quantum Physics

10 pages, comments are very welcome

Scientific paper

Weak measurement of a subset of noncommuting observables of a quantum system can be modeled by the open-system evolution, governed by the master equation in the Lindblad form. The open-system density operator can be represented as statistical mixture over non unitarily evolving pure states, driven by the stochastic Nonlinear Schrodinger equation (sNLSE). The globally stable solution of the sNLSE is obtained in the case where the measured subset of observables comprises the spectrum-generating algebra of the system. This solution is a generalized coherent state (GCS), associated with the algebra. The result is based on proving that GCS minimize the trace-norm of the covariance matrix, associated with the spectrum-generating algebra.

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