Abstract
We study separable (i.e., classically correlated) states for composite systems of spinless fermions that are distinguishable. For a proper formulation of entanglement formation for such systems, the state decompositions for mixed states should respect the univalence superselection rule. Fermion hopping always induces non-separability, while states with bosonic hopping correlation may or may not be separable. Under the Jordan-Klein-Wigner transformation from a given bipartite fermion system into a tensor product one, any separable state for the former is also separable for the latter. There are, however, U(1)-gauge invariant states that are non-separable for the former but separable for the latter.
Original language | English |
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Pages (from-to) | 3753-3762 |
Number of pages | 10 |
Journal | Journal of Physics A: Mathematical and General |
Volume | 39 |
Issue number | 14 |
DOIs | |
Publication status | Published - 2006 Apr 7 |
Externally published | Yes |
ASJC Scopus subject areas
- Statistical and Nonlinear Physics
- Mathematical Physics
- Physics and Astronomy(all)