Uncertainty principle and quantum fisher information. II.

Uncertainty principle and quantum fisher information. II.
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DOI:
10.1063/1.2748210
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发表时间:
2007-07-01
影响因子:
1.3
通讯作者:
Isola, Tommaso
Isola, Tommaso
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Gibilisco, Paolo;Imparato, Daniele;Isola, Tommaso

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海森堡和薛定谔测不准原理给出了方差积Var(rho)(A)Var(rho)(B)的下界,如果观测量A,B不相容,即交换子[A,B]不为零。本文证明了一个薛定谔形式的测不准原理,其中方差积Var(rho)(A)Var(rho)(B)的界依赖于相对于任意量子形式的Fisher信息的两个离散子i[rho,A]和i[rho,B]所覆盖的面积. (c)2007年,美国物理学会。
Heisenberg and Schrodinger uncertainty principles give lower bounds for the product of variances Var(rho)(A)Var(rho)(B) if the observables A,B are not compatible, namely, if the commutator [A,B] is not zero. In this paper, we prove an uncertainty principle in Schrodinger form where the bound for the product of variances Var(rho)(A)Var(rho)(B) depends on the area spanned by the commutators i[rho,A] and i[rho,B] with respect to an arbitrary quantum version of the Fisher information. (c) 2007 American Institute of Physics.