Tradeoff between energy and error in the discrimination of quantum-optical devices

Journal Article · Fri Jul 15 00:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.84.012310· OSTI ID:22038616

Bisio, Alessandro; Dall'Arno, Michele; D'Ariano, Giacomo Mauro ^[1]

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1. Quit group, Dipartimento di Fisica ''A. Volta'', via Bassi 6, I-27100 Pavia (Italy) and Istituto Nazionale di Fisica Nucleare, Gruppo IV, via Bassi 6, I-27100 Pavia (Italy)

We address the problem of energy-error tradeoff in the discrimination between two linear passive quantum optical devices with a single use. We provide an analytical derivation of the optimal strategy for beamsplitters and an iterative algorithm converging to the optimum in the general case. We then compare the optimal strategy with a simpler strategy using coherent input states and homodyne detection. It turns out that the former requires much less energy in order to achieve the same performances.

• OSTI ID: 22038616
• Journal Information: Physical Review. A, Vol. 84, Issue 1; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALGORITHMS
COMPARATIVE EVALUATIONS
PERFORMANCE
QUANTUM STATES