Coupling a Superconducting Qubit to a Left-Handed Metamaterial Resonator
- URL: http://arxiv.org/abs/2007.10932v2
- Date: Fri, 11 Dec 2020 17:12:08 GMT
- Title: Coupling a Superconducting Qubit to a Left-Handed Metamaterial Resonator
- Authors: S. Indrajeet, H. Wang, M.D. Hutchings, B.G. Taketani, Frank K.
Wilhelm, M.D. LaHaye, and B.L.T. Plourde
- Abstract summary: metamaterial resonant structures can exhibit microwave mode spectra with left-handed dispersion.
We have observed the coupling of the qubit to each of the modes that it passes through.
The ability to tailor the dense mode spectrum through the choice of circuit parameters makes this a promising platform for analog quantum simulation and quantum memories.
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- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Metamaterial resonant structures made from arrays of superconducting lumped
circuit elements can exhibit microwave mode spectra with left-handed
dispersion, resulting in a high density of modes in the same frequency range
where superconducting qubits are typically operated, as well as a bandgap at
lower frequencies that extends down to dc. Using this novel regime for
multi-mode circuit quantum electrodynamics, we have performed a series of
measurements of such a superconducting metamaterial resonator coupled to a
flux-tunable transmon qubit. Through microwave measurements of the
metamaterial, we have observed the coupling of the qubit to each of the modes
that it passes through. Using a separate readout resonator, we have probed the
qubit dispersively and characterized the qubit energy relaxation as a function
of frequency, which is strongly affected by the Purcell effect in the presence
of the dense mode spectrum. Additionally, we have investigated the ac Stark
shift of the qubit as the photon number in the various metamaterial modes is
varied. The ability to tailor the dense mode spectrum through the choice of
circuit parameters and manipulate the photonic state of the metamaterial
through interactions with qubits makes this a promising platform for analog
quantum simulation and quantum memories.
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