| Issue |
EPL
Volume 88, Number 1, October 2009
|
|
|---|---|---|
| Article Number | 10006 | |
| Number of page(s) | 4 | |
| Section | General | |
| DOI | https://doi.org/10.1209/0295-5075/88/10006 | |
| Published online | 26 October 2009 | |
Correlation in quantum states of two identical particles
Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences - Beijing 100080, China
Corresponding author: zhoudl72@aphy.iphy.ac.cn
Received:
8
August
2009
Accepted:
23
September
2009
We identify the correlation in a state of two identical particles as the residual information beyond what is already contained in the 1-particle reduced density matrix, and propose a correlation measure based on the maximum entropy principle. We obtain the analytical results of the correlation measure, which make it computable for arbitrary two-particle states. We also show that the degrees of correlation in the same two-particle states with different particle types will decrease in the following order: bosons, fermions, and distinguishable particles.
PACS: 03.65.Ud – Entanglement and quantum nonlocality (e.g. EPR paradox, Bell's inequalities, GHZ states, etc.) / 03.67.Mn – Entanglement measures, witnesses, and other characterizations / 89.70.Cf – Entropy and other measures of information
© EPLA, 2009
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