Compositeness effects, Pauli's principle and entanglement

Details Compositeness effects, Pauli's principle and entanglement Compositeness effects, Pauli's principle and entanglement

2006-09-19

arxiv.org/abs/quant-ph/0609147v1

J. Phys. A 39 (2006) 12525-12537

Physics

Quantum Physics

Scientific paper

10.1088/0305-4470/39/40/017

We analyse some compositeness effects and their relation with entanglement. We show that the purity of a composite system increases, in the sense of the expectation values of the deviation operators, with large values of the entanglement between the components of the system. We also study the validity of Pauli's principle in composite systems. It is valid within the limits of application of the approach presented here. We also present an example of two identical fermions, one of them entangled with a distinguishable particle, where the exclusion principle cannot be applied. This result can be important in the description of open systems.

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