Entanglement induced fluctuations of cold bosons

Ram Brustein, Amos Yarom

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


We show that due to entanglement, quantum fluctuations may differ significantly from statistical fluctuations. We calculate quantum fluctuations of the particle number and of the energy in a sub-volume of a system of bosons in a pure state, and briefly discuss the possibility of measuring them. We find that energy fluctuations have a non-extensive nature.

Original languageEnglish
Article numberP07025
JournalJournal of Statistical Mechanics: Theory and Experiment
Issue number7
StatePublished - 1 Jul 2008


  • Bose Einstein condensation (theory)
  • Entanglement in extended quantum systems (theory)


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