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Symmetry-Like Relation of Relative Entropy Measure of Quantum Coherence

2020
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Entropy
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Quantum coherence is an important physical resource in quantum information science, and also as one of the most fundamental and striking features in quantum physics. To quantify coherence, two proper measures were introduced in the literature, the one is the relative entropy of coherence C r ( ρ ) = S ( ρ diag ) − S ( ρ ) and the other is the ℓ 1 -norm of coherence C ℓ 1 ( ρ ) = ∑ i ≠ j | ρ i j | . In this paper, we obtain a symmetry-like relation of relative entropy measure C r ( ρ A 1 A 2 ⋯ A

doi:10.3390/e22030297
pmid:33286071
fatcat:hjg74ijh2zc23jf2j5oyxe62m4