Coherence, quantum Fisher information, superradiance, and entanglement as interconvertible resources

Kok Chuan Tan, Seongjeon Choi, Hyukjoon Kwon, and Hyunseok Jeong
Phys. Rev. A 97, 052304 – Published 2 May 2018

Abstract

We demonstrate that quantum Fisher information and superradiance can be formulated as coherence measures in accordance with the resource theory of coherence, thus establishing a direct link between metrological resources, superradiance, and coherence. The arguments are generalized to show that coherence may be considered as the underlying fundamental resource for any functional of state that is first of all faithful, and second, concave or linear. It is also shown that quantum Fisher information and the superradiant quantity are in fact antithetical resources in the sense that if coherence were directed to saturate one quantity, then it must come at the expense of the other. Finally, a key result of the paper is to demonstrate that coherence, quantum Fisher information, superradiant quantity, and entanglement are mutually interconvertible resources under incoherent operations.

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  • Received 26 January 2018

DOI:https://doi.org/10.1103/PhysRevA.97.052304

©2018 American Physical Society

Physics Subject Headings (PhySH)

Quantum Information, Science & TechnologyGeneral Physics

Authors & Affiliations

Kok Chuan Tan*, Seongjeon Choi, Hyukjoon Kwon, and Hyunseok Jeong

  • Center for Macroscopic Quantum Control & Institute of Applied Physics, Department of Physics and Astronomy, Seoul National University, Seoul 151-742, Korea

  • *bbtankc@gmail.com
  • jeongh@snu.ac.kr

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Issue

Vol. 97, Iss. 5 — May 2018

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