Particle partitioning entanglement in itinerant many-particle systems
arXiv:0804.0878 · doi:10.1103/PhysRevA.78.042326
Abstract
For itinerant fermionic and bosonic systems, we study `particle entanglement', defined as the entanglement between two subsets of particles making up the system. We formulate the general structure of particle entanglement in many-fermion ground states, analogous to the `area law' for the more usually studied entanglement between spatial regions. Basic properties of particle entanglement are uncovered by considering relatively simple itinerant models.
4 pages, 4 figures