Coherent-state storage and retrieval between superconducting cavities using parametric frequency conversion

Journal Article · Mon Apr 27 04:00:00 EDT 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4919759· OSTI ID:22398969

Sirois, A. J. ^[1]; Castellanos-Beltran, M. A.; DeFeo, M. P.; Ranzani, L.; Lecocq, F.; Simmonds, R. W.; Teufel, J. D.; Aumentado, J. ^[1]

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1. National Institute of Standard and Technology, Boulder, Colorado 80305 (United States)

In superconducting quantum information, machined aluminum superconducting cavities have proven to be a well-controlled, low-dissipation electromagnetic environment for quantum circuits such as qubits. They can possess large internal quality factors, Q{sub int} > 10{sup 8}, and present the possibility of storing quantum information for times far exceeding those of microfabricated circuits. However, in order to be useful as a storage element, these cavities require a fast “read/write” mechanism—in other words, they require tunable coupling between other systems of interest such as other cavity modes and qubits, as well as any associated readout hardware. In this work, we demonstrate these qualities in a simple dual cavity architecture in which a low-Q “readout” mode is parametrically coupled to a high-Q “storage” mode, allowing us to store and retrieve classical information. Specifically, we employ a flux-driven Josephson junction-based coupling scheme to controllably swap coherent states between two cavities, demonstrating full, sequenced control over the coupling rates between modes.

• OSTI ID: 22398969
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 17 Vol. 106; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALUMINIUM
ANNIHILATION OPERATORS
CONTROL
CONVERSION
COUPLING
EIGENSTATES
JOSEPHSON JUNCTIONS
QUALITY FACTOR
QUBITS
READOUT SYSTEMS
SUPERCONDUCTING CAVITY RESONATORS