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Initial Design of a W-Band Superconducting Kinetic Inductance Qubit

Faramarzi, Farzad and Day, Peter and Glasby, Jacob and Sypkens, Sasha and Colangelo, Marco and Chamberlin, Ralph and Mirhosseini, Mohammad and Schmidt, Kevin and Berggren, Karl K. and Mauskopf, Philip (2021) Initial Design of a W-Band Superconducting Kinetic Inductance Qubit. IEEE Transactions on Applied Superconductivity, 31 (5). Art. No. 1800605. ISSN 1051-8223. doi:10.1109/TASC.2021.3065304.

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Superconducting qubits are widely used in quantum computing research and industry. We describe a superconducting kinetic inductance qubit (and introduce the term Kineticon to describe it) operating at W-band frequencies with a nonlinear nanowire section that provides the anharmonicity required for two distinct quantum energy states. Operating the qubits at higher frequencies may relax the dilution refrigerator temperature requirements for these devices and paves the path for multiplexing a large number of qubits. Millimeter-wave operation requires superconductors with relatively high T_c, which implies high gap frequency, 2 Δ/h , beyond which photons break Cooper pairs. For example, NbTiN with T_c = 15K has a gap frequency near 1.4 THz, which is much higher than that of aluminum (90 GHz), allowing for operation throughout the millimeter-wave band. Here we describe a design and simulation of a W-band Kineticon qubit embedded in a 3-D cavity. We perform classical electromagnetic calculations of the resulting field distributions.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Faramarzi, Farzad0000-0002-9021-0057
Sypkens, Sasha0000-0002-6095-4215
Colangelo, Marco0000-0001-7611-0351
Mirhosseini, Mohammad0000-0002-9084-6880
Schmidt, Kevin0000-0002-1597-9835
Berggren, Karl K.0000-0001-7453-9031
Mauskopf, Philip0000-0001-6397-5516
Alternate Title:Initial Design of a W-band Superconducting Kinetic Inductance Qubit (Kineticon), Design of a W-band Superconducting Kinetic Inductance Qubit (Kineticon)
Additional Information:© 2021 IEEE. Manuscript received December 1, 2020; revised January 30, 2021; accepted February 15, 2021. Date of publication March 11, 2021; date of current version April 6, 2021. The work of Marco Colangelo and Karl K. Berggren was supported by National Science Foundation under Grant ECCS-2000743 (MIT).
Funding AgencyGrant Number
Subject Keywords:Kinetic inductance, mm-wave, quantum computing, superconducting qubits
Issue or Number:5
Record Number:CaltechAUTHORS:20210420-101341415
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Official Citation:F. Faramarzi et al., "Initial Design of a W-Band Superconducting Kinetic Inductance Qubit," in IEEE Transactions on Applied Superconductivity, vol. 31, no. 5, pp. 1-5, Aug. 2021, Art no. 1800605, doi: 10.1109/TASC.2021.3065304
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:108774
Deposited By: Tony Diaz
Deposited On:21 Apr 2021 17:03
Last Modified:10 May 2022 22:19

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