How the result of a measurement of a component of the spin of a spin-1/2 particle can turn out to be 100.
نویسندگان
چکیده
We have found that the usual measuring procedure for preselected and postselected ensembles of quantum systems gives unusual results. Under some natural conditions of weakness of the measurement, its result consistently defines a new kind of value for a quantum variable, which we call the weak value. A description of the measurement of the weak value of a component of a spin for an ensemble of preselected and postselected spin2 particles is presented.
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ورودعنوان ژورنال:
- Physical review letters
دوره 62 19 شماره
صفحات -
تاریخ انتشار 1988