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.
|Journal||Journal of Statistical Mechanics: Theory and Experiment|
|State||Published - 1 Jul 2008|
- Bose Einstein condensation (theory)
- Entanglement in extended quantum systems (theory)