ua nt - p h / 96 02 00 9 v 1 1 2 Fe b 19 96 PROTECTIVE MEASUREMENTS OF TWO - STATE VECTORS
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چکیده
A recent result about measurability of a quantum state of a single quantum system is generalized to the case of a single pre-and post-selected quantum system, described by a two-state vector. The protection required for such measurement is achieved by coupling the quantum system to a pre-and post-selected protected device yielding a nonhermitian effective Hamiltonian.
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تاریخ انتشار 1996