Quantum entropy and special relativity.
نویسندگان
چکیده
We consider a single free spin- 1 / 2 particle. The reduced density matrix for its spin is not covariant under Lorentz transformations. The spin entropy is not a relativistic scalar and has no invariant meaning.
منابع مشابه
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The trace over the degrees of freedom located in a subset of the space transforms the vacuum state into a mixed density matrix with non zero entropy. This geometric entropy is believed to be deeply related to the entropy of black holes. Indeed, previous calculations in the context of quantum field theory, where the result is actually ultraviolet divergent, have shown that the geometric entropy ...
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ورودعنوان ژورنال:
- Physical review letters
دوره 88 23 شماره
صفحات -
تاریخ انتشار 2002