Quantum information processing with Schrödinger cats

K. Nemoto; A. Gilchrist; W. J. Munro; T. C. Ralph; S. L. Braunstein; G. J. Milburn

doi:10.1117/12.497230

Quantum information processing with Schrödinger cats

K. Nemoto, A. Gilchrist, W. J. Munro^*, T. C. Ralph, S. L. Braunstein, G. J. Milburn

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

We investigate the utility of a superposition of coherent states for quantum information processing. We show that quantum computation circuits using coherent states as the logical qubits can be constructed from simple linear networks, conditional measurements and coherent superposition resource states. We can utilize such states and associated quantum circuits for two quantum metrology applications, one for weak force measurements and the second for precise phase estimation. We show in both cases that a sensitivity at the Heisenberg limit is achievable.

Original language	English
Pages (from-to)	434-443
Number of pages	10
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	5111
DOIs	https://doi.org/10.1117/12.497230
Publication status	Published - 2003
Externally published	Yes

Keywords

Quantum computation
Quantum information
Quantum metrology
Quantum optics
Schrödinger cats

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abstract = "We investigate the utility of a superposition of coherent states for quantum information processing. We show that quantum computation circuits using coherent states as the logical qubits can be constructed from simple linear networks, conditional measurements and coherent superposition resource states. We can utilize such states and associated quantum circuits for two quantum metrology applications, one for weak force measurements and the second for precise phase estimation. We show in both cases that a sensitivity at the Heisenberg limit is achievable.",

keywords = "Quantum computation, Quantum information, Quantum metrology, Quantum optics, Schr{\"o}dinger cats",

author = "K. Nemoto and A. Gilchrist and Munro, {W. J.} and Ralph, {T. C.} and Braunstein, {S. L.} and Milburn, {G. J.}",

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AU - Gilchrist, A.

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AU - Ralph, T. C.

AU - Braunstein, S. L.

AU - Milburn, G. J.

PY - 2003

Y1 - 2003

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AB - We investigate the utility of a superposition of coherent states for quantum information processing. We show that quantum computation circuits using coherent states as the logical qubits can be constructed from simple linear networks, conditional measurements and coherent superposition resource states. We can utilize such states and associated quantum circuits for two quantum metrology applications, one for weak force measurements and the second for precise phase estimation. We show in both cases that a sensitivity at the Heisenberg limit is achievable.

KW - Quantum computation

KW - Quantum information

KW - Quantum metrology

KW - Quantum optics

KW - Schrödinger cats

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DO - 10.1117/12.497230

M3 - Article

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JF - Proceedings of SPIE - The International Society for Optical Engineering

ER -

Quantum information processing with Schrödinger cats

Abstract

Keywords

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