Maneuvering measurement-coherence into measurement-entanglement
Abstract
Quantum dynamics governs the transformation of static quantum resources, such as coherence and entanglement, in both quantum states and measurements. Prior studies have established that a quantum channel's state-cohering power can be converted into the state-entangling power without additional coherence. Here, we complete this coherence-to-entanglement paradigm by demonstrating that a channel's measurement-cohering power can likewise be converted into the measurement-entangling power. This result reinforces, on the dynamical level, the intuition that entanglement emerges as a manifestation of coherence. To formalize this picture, we develop resource theories for measurement-cohering and measurement-entangling powers and characterize the structure of incoherent measurements to analyze measurement-coherence generation. Furthermore, we show that the state-cohering power of a quantum channel is equivalent to the measurement-cohering power of its adjoint map, and a corresponding equivalence also exists between the state-entangling power and the measurement-entangling power.
Keywords
Cite
@article{arxiv.2410.20793,
title = {Maneuvering measurement-coherence into measurement-entanglement},
author = {Ho-Joon Kim and Soojoon Lee},
journal= {arXiv preprint arXiv:2410.20793},
year = {2025}
}
Comments
Manuscript is revised