A new coherence measure based on fidelity
| Autor: | Liu, C. L., Zhang, Da-Jian, Yu, Xiao-Dong, Ding, Qi-Ming, Liu, Longjiang |
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| Rok vydání: | 2017 |
| Předmět: | |
| Zdroj: | Quantum Inf Process (2017) 16:198 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1007/s11128-017-1650-7 |
| Popis: | Quantifying coherence is an essential endeavor for both quantum foundations and quantum technologies. In this paper, we put forward a quantitative measure of coherence by following the axiomatic definition of coherence measures introduced in [T. Baumgratz, M. Cramer, and M. B. Plenio, Phys. Rev. Lett. 113, 140401 (2014)]. Our measure is based on fidelity and analytically computable for arbitrary states of a qubit. As one of its applications, we show that our measure can be used to examine whether a pure qubit state can be transformed into another pure or mixed qubit state only by incoherent operations. Comment: 10 pages |
| Databáze: | arXiv |
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