An elementary formula for entanglement entropies of fermionic systems
arXiv:quant-ph/0501145 · doi:10.1103/PhysRevA.72.022302
Abstract
An elementary formula for the von Neumann and Renyi entropies describing quantum correlations in two-fermionic systems having four single particle states is presented. An interesting geometric structure of fermionic entanglement is revealed. A connection with the generalized Pauli principle is established.
8 pages