Fast control of dissipation in a superconducting resonator

V A Sevriuk,L Grönberg,M Jenei,M Partanen,S Masuda,J Goetz,K Y Tan,M Silveri,M Möttönen,V Vesterinen,E Hyyppä

doi:10.1063/1.5116659

Abstract

We report on fast tunability of an electromagnetic environment coupled to a superconducting coplanar waveguide resonator. Namely, we utilize a recently developed quantum-circuit refrigerator (QCR) to experimentally demonstrate a dynamic tunability in the total damping rate of the resonator up to almost two orders of magnitude. Based on the theory, it corresponds to a change in the internal damping rate by nearly four orders of magnitude. The control of the QCR is fully electrical, with the shortest implemented operation times in the range of 10 ns. This experiment constitutes a fast active reset of a superconducting quantum circuit. In the future, a similar scheme can potentially be used to initialize superconducting quantum bits.

Highlights

From the practical point of view, tunable environments are utilized to protect and process quantum information10–12 and to implement qubit reset.13,14 The latter application calls for fast tunability of the environment due to the increasing of the rate of the operations on a quantum computer
We report on fast tunability of an electromagnetic environment coupled to a superconducting coplanar waveguide resonator
To achieve high fidelity, one usually needs to increase the reset time to the microsecond range

Summary

Fast control of dissipation in a superconducting resonator

Cite as: Appl. Phys. Lett. 115, 082601 (2019); https://doi.org/10.1063/1.5116659 Submitted: 26 June 2019 • Accepted: 29 July 2019 • Published Online: 20 August 2019 ARTICLES YOU MAY BE INTERESTED IN A quantum engineer's guide to superconducting qubits Applied Physics Reviews 6, 021318 (2019); https://doi.org/10.1063/1.5089550 Calibration of cryogenic amplification chains using normal-metal–insulator–superconductor junctions Applied Physics Letters 114, 192603 (2019); https://doi.org/10.1063/1.5096262 Coplanar waveguide resonators for circuit quantum electrodynamics Journal of Applied Physics 104, 113904 (2008); https://doi.org/10.1063/1.3010859

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Findings

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