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
影响因子:
2.9
通讯作者:
C. P. Sun
中科院分区:
文献类型:
--
作者:
Yao Yao;G. H. Dong;Li Ge;Mo Li;C. P. Sun
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.
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