Entanglement enhanced distinguishability of coherence-breaking channels

Long-Mei Yang, Tao Li, Shao-Ming Fei, and Zhi-Xi Wang

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Submission date: 21. Aug. 2019
Pages: 7
published in: International journal of quantum information, 17 (2019) 4, art-no. 1950036 
DOI number (of the published article): 10.1142/S0219749919500369
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Abstract:
Originated from the superposition principle in quantum mechanics, coherence has been extensively studied as a kind important resource in quantum information processing. We investigate the distinguishability of coherence-breaking channels with the help of quantum entanglement. By explicitly computing the minimal error probability of channel discrimination, it is shown that entanglement can enhance the capacity of channel distinguishability.