期刊
PHYSICAL REVIEW A
卷 91, 期 4, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.91.042120
关键词
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资金
- NSFC [61303009, 11271237, 61228305, 11175248]
- Fundamental Research Funds for the Central Universities [GK201502004]
- Research Fund for the Doctoral Program of Higher Education of China [20130202110001]
We investigate the coherencemeasures induced by fidelity and trace norm, based on the coherence quantification recently proposed by Baumgratz et al. [T. Baumgratz, M. Cramer, and M. B. Plenio, Phys. Rev. Lett. 113, 140401 (2014)]. We show that the fidelity of coherence does not in general satisfy the monotonicity requirement as a measure of coherence under the subselection of the measurement condition. We find that the trace norm of coherence can act as a measure of coherence for qubits and some special class of qutrits with some restrictions on the incoherent operators, while the general case needs to be explored further.
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