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Examples of bosonic de Finetti states over finite dimensional Hilbert spaces

Quantum Physics 2009-11-11 v2

Abstract

According to the Quantum de Finetti Theorem, locally normal infinite particle states with Bose-Einstein symmetry can be represented as mixtures of infinite tensor powers of vector states. This note presents examples of infinite-particle states with Bose-Einstein symmetry that arise as limits of Gibbs ensembles on finite dimensional spaces, and displays their de Finetti representations. We consider Gibbs ensembles for systems of bosons in a finite dimensional setting and discover limits as the number of particles tends to infinity, provided the temperature is scaled in proportion to particle number.

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Cite

@article{arxiv.quant-ph/0506111,
  title  = {Examples of bosonic de Finetti states over finite dimensional Hilbert spaces},
  author = {Alex D. Gottlieb},
  journal= {arXiv preprint arXiv:quant-ph/0506111},
  year   = {2009}
}

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