Phys. Rev. A 70, 061801(R) (2004) [4 pages]

Generation of macroscopic superposition states with small nonlinearity

Abstract

References

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H. Jeong¹, M. S. Kim², T. C. Ralph¹, and B. S. Ham³
¹Centre for Quantum Computer Technology, Department of Physics, University of Queensland, St Lucia Qld 4072, Australia
²School of Mathematics and Physics, Queen’s University, Belfast BT7 1NN, United Kingdom
³Graduate School of Information & Communication, Inha University, Incheon, South Korea

Received 11 May 2004; revised 30 August 2004; published 9 December 2004

We suggest a scheme to generate a macroscopic superposition state (“Schrödinger cat state”) of a free-propagating optical field using a beam splitter, homodyne measurement, and a very small Kerr nonlinear effect. Our scheme makes it possible to reduce considerably the required nonlinear effect to generate an optical cat state using simple and efficient optical elements.

URL:

http://link.aps.org/doi/10.1103/PhysRevA.70.061801

DOI:

10.1103/PhysRevA.70.061801

PACS:

42.50.−p, 03.65.−w, 03.65.Ta

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Phys. Rev. A 70, 061801(R) (2004) [4 pages]

Generation of macroscopic superposition states with small nonlinearity