Generating Grid States From Schrödinger Cat States without Post-Selection

Abstract

Grid (or comb) states are an interesting class of bosonic states introduced by Gottesman, Kitaev and Preskill to encode a qubit into an oscillator. A method to generate or `breed' a grid state from Schrödinger cat states using beam splitters and homodyne measurements is known, but this method requires post-selection. In this paper we show how post-processing of the measurement data can be used to entirely remove the need for post-selection, making the scheme much more viable. We bound the asymptotic behavior of the breeding procedure and demonstrate the efficacy of the method numerically.

10 pages + 5 page appendix, 5 figures

References in corpus (2)

• Optical synthesis of large-amplitude squeezed coherent-state superpositions with minimal resources
• Continuous variable encoding by ponderomotive interaction

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