Measuring coherence via Kirkwood-Dirac nonclassicality with respect to mutually unbiased bases

• URL: http://arxiv.org/abs/2411.11666v1
• Date: Mon, 18 Nov 2024 15:45:25 GMT
• Title: Measuring coherence via Kirkwood-Dirac nonclassicality with respect to mutually unbiased bases
• Authors: Yan Liu, Zhihua Guo, Zhihao Ma, Shao-Ming Fei,
• Abstract summary: We investigate the Kirkwood-Dirac classicality with respect to mutually unbiased bases. For prime dimensional Hilbert spaces, we demonstrate that quantum states which exhibit Kirkwood-Dirac classicality for two distinct sets of mutually unbiased bases $A$, $B'$ must necessarily be incoherent with respect to $A$.
• Score: 6.0218574475189195
• License:
• Abstract: The Kirkwood-Dirac distribution, serving as an informationally complete representation of a quantum state, has recently garnered { increasing} attention. We investigate the Kirkwood-Dirac classicality with respect to mutually unbiased bases. For prime dimensional Hilbert spaces, we demonstrate that quantum states which exhibit Kirkwood-Dirac classicality for two distinct sets of mutually unbiased bases $A$, $B$ and $A$, $B'$ must necessarily be incoherent with respect to $A$. We subsequently introduce a coherence monotone based on Kirkwood-Dirac nonclassicality with respect to mutually unbiased bases. Additionally, we establish that this coherence monotone can be expressed through weak values, suggesting that quantum coherence can be utilized to detect anomalous weak values.

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