Coherence measures based on sandwiched R(e)nyi relative entropy

• 来源期刊: 中国物理B（英文版）
• 关键词: quantum coherence coherence measure sandwiched R(e)nyi relative entropy
• 年，卷（期）: 2020,（1）
• 页码范围: 126-132
• 页数: 7页
• 语种: 英文
• DOI: 10.1088/1674-1056/ab5930

摘要

Coherence is a fundamental ingredient for quantum physics and a key resource for quantum information theory. Baumgratz, Cramer and Plenio established a rigorous framework (BCP framework) for quantifying coherence [Baumgratz T, Cramer M and Plenio M B Phys. Rev. Lett. 113140401 (2014)]. In the present paper, under the BCP framework we provide two classes of coherence measures based on the sandwiched R(e)nyi relative entropy. We also prove that we cannot get a new coherence measure f (C(·)) by a function f acting on a given coherence measure C.