Volume 88, Number 1, October 2009
|Number of page(s)||4|
|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: firstname.lastname@example.org
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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