Increasing identical particle entanglement by fuzzy measurements
Physical Review A Atomic Molecular and Optical Physics 72:6 (2005)
Abstract:
We investigate the effects of fuzzy measurements on spin entanglement for identical particles, both fermions and bosons. We first consider an ideal measurement apparatus and define operators that detect the symmetry of the spatial and spin part of the density matrix as a function of particle distance. Then, moving on to realistic devices that can only detect the position of the particle to within a certain spread, it was surprisingly found that the entanglement between particles increases with the broadening of detection. © 2005 The American Physical Society.Work extraction from tripartite entanglement
New Journal of Physics 7 (2005)