Bulletin of the American Physical Society
APS March Meeting 2018
Monday–Friday, March 5–9, 2018; Los Angeles, California
Session L28: Quantum Metrology, Characterization and Measurements
11:15 AM–2:15 PM,
Wednesday, March 7, 2018
LACC Room: 405
Sponsoring Unit: DQI
Chair: Shengshi Pang, University of Rochester
Abstract: L28.00004 : Breeding Grid States From Schrödinger Cat States without Post-Selection*
11:51 AM–12:03 PM
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. 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.
Bounding the asymptotic behavior of the breeding procedure is challenging. We show how a new class of approximate grid states that is invariant under the breeding operation can be used to obtain such bounds.
Finally, we demonstrate the efficacy of the method numerically.
*We acknowledge support through the EU via the ERC GRANT EQEC. This research was supported in part by Perimeter Institute for Theoretical Physics.
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