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Approaching ultrastrong coupling in transmon circuit QED using a high-impedance resonator

Bosman, Sal J and Gely, Mario F and Singh, Vibhor and Bothner, Daniel and Castellanos-Gomez, Andres and Steele, Gary A (2017) Approaching ultrastrong coupling in transmon circuit QED using a high-impedance resonator. In: PHYSICAL REVIEW B, 95 (22).

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Official URL: http://dx.doi.org/10.1103/PhysRevB.95.224515


In this experiment, we couple a superconducting transmon qubit to a high-impedance 645 Omega microwave resonator. Doing so leads to a large qubit-resonator coupling rate g, measured through a large vacuum Rabi splitting of 2g similar or equal to 910 MHz. The coupling is a significant fraction of the qubit and resonator oscillation frequencies., placing our system close to the ultrastrong coupling regime ((g) over bar = g/omega = 0.071 on resonance). Combining this setup with a vacuum-gap transmon architecture shows the potential of reaching deep into the ultrastrong coupling (g) over bar similar to 0.45 with transmon qubits.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the AMER PHYSICAL SOC, ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 22 Jul 2017 04:33
Last Modified: 22 Jul 2017 04:33
URI: http://eprints.iisc.ac.in/id/eprint/57454

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