Alternative descriptions and bipartite compound quantum systems

Details Alternative descriptions and bipartite compound quantum systems Alternative descriptions and bipartite compound quantum systems

2008-11-10

arxiv.org/abs/0811.1415v1

J.Phys.A42:055303,2009

Physics

Quantum Physics

submitted to J. Phys. A

Scientific paper

10.1088/1751-8113/42/5/055303

We analyze some features of alternative Hermitian and quasi-Hermitian quantum descriptions of simple and bipartite compound systems. We show that alternative descriptions of two interacting subsystems are possible if and only if the metric operator of the compound system can be obtained as tensor product of positive operators on component spaces. Some examples also show that such property could be strictly connected with symmetry properties of the non-Hermitian Hamiltonian.

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