Microwave Down-Conversion with an Impedance-Matched Λ System in Driven Circuit QED
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Inomata-2014-Microwave down-conversion.pdf
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Author(s)
Inomata, K.
Koshino, K.
Lin, Z. R.
Tsai, J. S.
Nakamura, Yasunobu
Yamamoto, T.
Oliver, William D.
Date Issued
August 2014
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Inomata, K., K. Koshino, Z. R. Lin, W. D. Oliver, J. S. Tsai, Y. Nakamura, and T. Yamamoto. “Microwave Down-Conversion with an Impedance-Matched Λ System in Driven Circuit QED.” Physical Review Letters 113, no. 6 (August 2014). © 2014 American Physical Society
Version
Final published version
Abstract
By driving a dispersively coupled qubit-resonator system, we realize an “impedance-matched” Λ system that has two identical radiative decay rates from the top level and interacts with a semi-infinite waveguide. It has been predicted that a photon input from the waveguide deterministically induces a Raman transition in the system and switches its electronic state. We confirm this through microwave response to a continuous probe field, observing near-perfect (99.7%) extinction of the reflection and highly efficient (74%) frequency down-conversion. These proof-of-principle results lead to deterministic quantum gates between material qubits and microwave photons and open the possibility for scalable quantum networks interconnected with waveguide photons.
MIT Department
Lincoln Laboratory
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.113.063604
