Instantaneous measurement of non-local variables is possible
Lev Vaidman · arXiv (Cornell University) · 2001
It is shown, under the assumption of possibility to perform an arbitrary local operation, that all nonlocal variables, related to two or more separate sites can be measured instantaneously. The measurement is based on teleportation method. It is a verification measurement: it yields reliably the eigenvalues of the nonlocal variables, but it does not prepare the eigenstates of the system.