Observation of a collective mode of an array of transmon qubits

Shulga, K.V., Yang, P., Fedorov, G.P., Fistul, M.V., Weides, M. and Ustinov, A.V. (2017) Observation of a collective mode of an array of transmon qubits. JETP Letters, 105(1), pp. 47-50. (doi:10.1134/S0021364017010143)

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Abstract

Arrays of transmon qubits coupled to a λ/2 superconducting coplanar waveguide resonator have been studied by microwave spectroscopy. The emergence of a collective mode has been discovered for a cluster of N > 5 qubits, whose coupling constant to the electromagnetic field in the resonator is √N times greater compared to a single qubit. In addition, the emergence of collective multiphoton transitions exciting higher levels of a qubit cluster has been demonstrated and the interaction of an individual qubit with such a cluster has been investigated.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Weides, Professor Martin
Authors: Shulga, K.V., Yang, P., Fedorov, G.P., Fistul, M.V., Weides, M., and Ustinov, A.V.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:JETP Letters
Publisher:Springer
ISSN:0021-3640
ISSN (Online):1090-6487
Published Online:21 April 2017

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