Maneuvering measurement-coherence into measurement-entanglement

• URL: http://arxiv.org/abs/2410.20793v1
• Date: Mon, 28 Oct 2024 07:18:34 GMT
• Title: Maneuvering measurement-coherence into measurement-entanglement
• Authors: Ho-Joon Kim, Soojoon Lee,
• Abstract summary: Quantum coherence serves as a static resource in both quantum states and measurements, the latter termed measurement-coherence. Previous studies have established the conversion of static quantum coherence into entanglement for states and measurements. We extend this framework by demonstrating that a quantum channel's measurement-coherence generating power can also be converted to entanglement-generating power without requiring additional measurement-coherence.
• Score: 1.8416014644193066
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• Abstract: Quantum coherence, fundamental to the distinct behavior of quantum systems, serves as a static resource in both quantum states and measurements, the latter termed measurement-coherence. Previous studies have established the conversion of static quantum coherence into entanglement for states and measurements, and the conversion from coherence generating power to entanglement-generating power in quantum dynamics. In this work, we extend this framework by demonstrating that a quantum channel's measurement-coherence generating power can also be converted to measurement-entanglement generating power without requiring additional measurement-coherence. This result completes the coherence-to-entanglement conversion picture at the dynamical level, incorporating the static cases. We formulate resource theories for both measurement-coherence and measurement-entanglement generating powers, and elucidate the structure of incoherent measurements to facilitate our investigation into measurement-coherence generating powers. Furthermore, we establish that a quantum channel's coherence generating power is equivalent to the measurement-coherence generating power of its adjoint map, with a corresponding, though weaker, relation for quantum entanglement.

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