Role of Fermion Exchanges in Statistical Signatures of Composite Bosons

Details Role of Fermion Exchanges in Statistical Signatures of Composite Bosons Role of Fermion Exchanges in Statistical Signatures of Composite Bosons

2009-03-15

arxiv.org/abs/0903.2664v1

Physics

Quantum Physics

14 pages

Scientific paper

We study statistical signatures of composite bosons made of two fermions using a new many-body approach. Extending number-states to composite bosons, two-particle correlations as well as the dispersion of the probability distribution are analyzed. We show that the particle composite nature reduces the anti-bunching effect predicted for elementary bosons. Furthermore, the probability distribution exhibits a dispersion which is greater for composite bosons than for elementary bosons. This dispersion corresponds to the one of sub-Poissonian processes, as for a quantum state, but, unlike its elementary boson counterpart, it is not minimum. In general, our work shows that it is necessary to take into account the Pauli exclusion principle which takes place between fermionic components of composite bosons - along the line here used - to possibly extract statistical properties in a precise way.

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