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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Abstract

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
Publication:	PHYSICAL REVIEW B
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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