ua nt - p h / 06 02 22 6 v 2 2 8 M ar 2 00 6 Weak Values , Pre - and Post - selection , and Contextuality
نویسنده
چکیده
By analyzing the concept of contextuality (e.g. Bell-Kochen-Specker) in light of post-selection, it is possible to assign definite values to observables in a new and surprising way. We present physical reasons for restrictions on these assignments. In addition, we show that when measurements are performed which do not disturb the pre-and post-selection (i.e. weak-measurements), then novel experimental aspects of contextuality can be demonstrated. Certain results of these measurements (eccentric weak values with e.g. negative values), however, cannot be explained by a " classical-like " hidden variable theory.
منابع مشابه
ar X iv : q ua nt - p h / 06 02 22 6 v 1 2 8 Fe b 20 06 Weak Values , Pre - and Post - selection , and Contextuality
Examples involving contextuality (e.g. Bell-Kochen-Specker) are analyzed and post-selection is shown to allow definite assignment of values to observ-ables in a new way. A physical reason is presented for restrictions on these assignments. Finally, it is shown that if measurements are performed which do not disturb the pre-and post-selection (i.e. weak-measurements), then a new experimental asp...
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