Adaptive Measurements in the Optical Quantum Information Laboratory
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Author(s)
Wiseman, Howard M
Berry, Dominic W
Bartlett, Stephen D
Higgins, Brendon L
Pryde, Geoffrey J
Year published
2009
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Adaptive techniques make practical many quantum measurements that would otherwise be beyond current laboratory capabilities. For example, they allow discrimination of nonorthogonal states with a probability of error equal to the Helstrom bound, measurement of the phase of a quantum oscillator with accuracy approaching (or in some cases attaining) the Heisenberg limit (HL), and estimation of phase in interferometry with a variance scaling at the HL, using only single qubit measurement and control. Each of these examples has close links with quantum information, in particular, experimental optical quantum information: ...
View more >Adaptive techniques make practical many quantum measurements that would otherwise be beyond current laboratory capabilities. For example, they allow discrimination of nonorthogonal states with a probability of error equal to the Helstrom bound, measurement of the phase of a quantum oscillator with accuracy approaching (or in some cases attaining) the Heisenberg limit (HL), and estimation of phase in interferometry with a variance scaling at the HL, using only single qubit measurement and control. Each of these examples has close links with quantum information, in particular, experimental optical quantum information: the first is a basic quantum communication protocol; the second has potential application in linear optical quantum computing; the third uses an adaptive protocol inspired by the quantum phase estimation algorithm.We discuss each of these examples and their implementation in the laboratory, but concentrate upon the last, which was published most recently [Higgins et al., Nature, vol. 450, p. 393, 2007].
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View more >Adaptive techniques make practical many quantum measurements that would otherwise be beyond current laboratory capabilities. For example, they allow discrimination of nonorthogonal states with a probability of error equal to the Helstrom bound, measurement of the phase of a quantum oscillator with accuracy approaching (or in some cases attaining) the Heisenberg limit (HL), and estimation of phase in interferometry with a variance scaling at the HL, using only single qubit measurement and control. Each of these examples has close links with quantum information, in particular, experimental optical quantum information: the first is a basic quantum communication protocol; the second has potential application in linear optical quantum computing; the third uses an adaptive protocol inspired by the quantum phase estimation algorithm.We discuss each of these examples and their implementation in the laboratory, but concentrate upon the last, which was published most recently [Higgins et al., Nature, vol. 450, p. 393, 2007].
View less >
Journal Title
IEEE Journal of Selected Topics in Quantum Electronics
Volume
15
Issue
6
Copyright Statement
© 2009 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from IEEE.
Subject
Atomic, molecular and optical physics
Quantum physics
Quantum information, computation and communication
Quantum optics and quantum optomechanics
Electrical engineering
Electronics, sensors and digital hardware