Maximal coherence in a generic basis

Maximal coherence in a generic basis
复制标题

通用基础上的最大一致性

DOI:
10.1103/physreva.94.062339
复制
发表时间:
2016-11
期刊:
影响因子:
2.9
通讯作者:
C. P. Sun
C. P. Sun
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Yao Yao;G. H. Dong;Li Ge;Mo Li;C. P. Sun

文献摘要

参考文献

被引文献

相似文献

由于量子相干性是量子物理的一个重要特征,量子相干性的量化和应用一直是量子信息科学的核心问题之一。在最近提出的量子相干性资源理论框架内,在特定情况下表征量子相干性需要预先选择一个基准基,即量子相干性是一个基依赖量。因此,一个自然的问题是:什么是最大和最小的相干性包含在一个特定的量子态相对于一个通用的基础?虽然最小情况是微不足道的,但要验证在哪个基中量子相干性最大并不那么直观。基于相对熵的相干性测度,我们指出了对于给定的状态,量子相干性最大的特定基,其中傅立叶矩阵(或更一般地,复阿达玛矩阵)在确定基中起着关键作用。有趣的是,虽然我们可以证明与傅里叶矩阵相关的基是优化相干性${l}{1}$范数的一个稳定点,但数值模拟表明它不是全局最优选择。
Since quantum coherence is an undoubted characteristic trait of quantum physics, the quantification and application of quantum coherence has been one of the long-standing central topics in quantum information science. Within the framework of a resource theory of quantum coherence proposed recently, a fiducial basis should be preselected for characterizing the quantum coherence in specific circumstances, namely, the quantum coherence is a basis-dependent quantity. Therefore, a natural question is raised: what are the maximum and minimum coherences contained in a certain quantum state with respect to a generic basis? While the minimum case is trivial, it is not so intuitive to verify in which basis the quantum coherence is maximal. Based on the coherence measure of relative entropy, we indicate the particular basis in which the quantum coherence is maximal for a given state, where the Fourier matrix (or more generally, complex Hadamard matrices) plays a critical role in determining the basis. Intriguingly, though we can prove that the basis associated with the Fourier matrix is a stationary point for optimizing the ${l}_{1}$ norm of coherence, numerical simulation shows that it is not a global optimal choice.
DOI: 10.1016/j.neucom.2004.01.070
发表时间: 2004-06
期刊: Neurocomputing
影响因子: 6
作者:
R. G. Feldman
通讯作者: R. G. Feldman
DOI: 10.1057/mds.2010.181
发表时间: 2023-09
期刊: Monthly Digest of Statistics
影响因子: --
作者:
Aghnia Awalunnisa;U. Negeri;Kata Kunci
通讯作者: Aghnia Awalunnisa;U. Negeri;Kata Kunci