TY - JOUR
T1 - Many-region vacuum entanglement
T2 - Distilling a W state
AU - Silman, Jonathan
AU - Reznik, Benni
PY - 2005/5
Y1 - 2005/5
N2 - We investigate the correlations between any number of arbitrarily far-apart regions of the vacuum of the free Klein-Gordon field by means of its finite duration coupling to an equal number of localized detectors. We show that the correlations between any N such regions enable us to distill an N-partite W state, and therefore exhibit true N-fold entanglement. Furthermore, we show that for N=3, the correlations cannot be reproduced by a hybrid local-nonlocal hidden-variable model. For N≥4 the issue remains open.
AB - We investigate the correlations between any number of arbitrarily far-apart regions of the vacuum of the free Klein-Gordon field by means of its finite duration coupling to an equal number of localized detectors. We show that the correlations between any N such regions enable us to distill an N-partite W state, and therefore exhibit true N-fold entanglement. Furthermore, we show that for N=3, the correlations cannot be reproduced by a hybrid local-nonlocal hidden-variable model. For N≥4 the issue remains open.
UR - http://www.scopus.com/inward/record.url?scp=26944479336&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.71.054301
DO - 10.1103/PhysRevA.71.054301
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AN - SCOPUS:26944479336
SN - 1050-2947
VL - 71
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
IS - 5
M1 - 054301
ER -