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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 35, Iss. 19 — Oct. 1, 2010
  • pp: 3261–3263

All-optical generation of states for “Encoding a qubit in an oscillator”

H. M. Vasconcelos, L. Sanz, and S. Glancy  »View Author Affiliations


Optics Letters, Vol. 35, Issue 19, pp. 3261-3263 (2010)
http://dx.doi.org/10.1364/OL.35.003261


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Abstract

Most quantum computation schemes propose encoding qubits in two-level systems. Others exploit the use of an infinite-dimensional system. In “Encoding a qubit in an oscillator” [ Phys. Rev. A 64, 012310 (2001)], Gottesman, Kitaev, and Preskill (GKP) combined these approaches when they proposed a fault-tolerant quantum computation scheme in which a qubit is encoded in the continuous position and momentum degrees of freedom of an oscillator. One advantage of this scheme is that it can be performed by use of relatively simple linear optical devices, squeezing, and homodyne detection. However, we lack a practical method to prepare the initial GKP states. Here we propose the generation of an approximate GKP state by using superpositions of optical coherent states (sometimes called “Schrödinger cat states”), squeezing, linear optical devices, and homodyne detection.

© 2010 Optical Society of America

OCIS Codes
(270.6570) Quantum optics : Squeezed states
(270.5585) Quantum optics : Quantum information and processing

ToC Category:
Quantum Optics

History
Original Manuscript: June 2, 2010
Revised Manuscript: September 3, 2010
Manuscript Accepted: September 3, 2010
Published: September 24, 2010

Citation
H. M. Vasconcelos, L. Sanz, and S. Glancy, "All-optical generation of states for “Encoding a qubit in an oscillator”," Opt. Lett. 35, 3261-3263 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-19-3261

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