TY - JOUR
T1 - Nonlocal measurements in the time-symmetric quantum mechanics
AU - Vaidman, Lev
AU - Nevo, Izhar
PY - 2006/5/20
Y1 - 2006/5/20
N2 - Although for some nonlocal variables the standard quantum measurements which are reliable, instantaneous, and nondemolition, are impossible, demolition reliable instantaneous measurements of all variables are possible. It is shown that this is correct also in the framework of the time-symmetric quantum formalism, i.e. nonlocal variables of composite quantum systems with quantum states evolving both forward and backward in time are measurable in a demolition way. The result follows from the possibility to reverse with certainty the time direction of backward evolving quantum states.
AB - Although for some nonlocal variables the standard quantum measurements which are reliable, instantaneous, and nondemolition, are impossible, demolition reliable instantaneous measurements of all variables are possible. It is shown that this is correct also in the framework of the time-symmetric quantum formalism, i.e. nonlocal variables of composite quantum systems with quantum states evolving both forward and backward in time are measurable in a demolition way. The result follows from the possibility to reverse with certainty the time direction of backward evolving quantum states.
KW - Nonlocal measurements
KW - Quantum measurements
KW - Time symmetry
UR - http://www.scopus.com/inward/record.url?scp=33744532528&partnerID=8YFLogxK
U2 - 10.1142/S0217979206034108
DO - 10.1142/S0217979206034108
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AN - SCOPUS:33744532528
SN - 0217-9792
VL - 20
SP - 1528
EP - 1535
JO - International Journal of Modern Physics B
JF - International Journal of Modern Physics B
IS - 11-13
ER -