Optimal quantum state estimation with use of the no-signaling principle

Journal Article · Wed Dec 15 00:00:00 EST 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.062318· OSTI ID:21528847

Han, Yeong-Deok ^[1]; Bae, Joonwoo ^[2]; Xiangbin, Wang ^[3]; Hwang, Won-Young ^[4]

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1. Department of Game Contents, Woosuk University, Wanju, Cheonbuk 565-701 (Korea, Republic of)
2. School of Computational Sciences, Korea Institute for Advanced Study, Seoul 130-012 (Korea, Republic of)
3. Department of Physics and the Key Laboratory of Atomic and Nanosciences, Ministry of Education, Tsinghua University, Beijing 100084 (China)
4. Department of Physics Education, Chonnam National University, Gwangju 500-757 (Korea, Republic of)

A simple derivation of the optimal state estimation of a quantum bit was obtained by using the no-signaling principle. In particular, the no-signaling principle determines a unique form of the guessing probability independent of figures of merit, such as the fidelity or information gain. This proves that the optimal estimation for a quantum bit can be achieved by the same measurement for almost all figures of merit.

• OSTI ID: 21528847
• Journal Information: Physical Review. A, Vol. 82, Issue 6; Other Information: DOI: 10.1103/PhysRevA.82.062318; (c) 2010 American Institute of Physics; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
GAIN
PROBABILITY
QUANTUM STATES
QUBITS
AMPLIFICATION
INFORMATION
QUANTUM INFORMATION