Integrating superfluids with superconducting qubit systems

J. R. Lane, D. Tan, N. R. Beysengulov, K. Nasyedkin, E. Brook, L. Zhang, T. Stefanski, H. Byeon, K. W. Murch, and J. Pollanen
Phys. Rev. A 101, 012336 – Published 22 January 2020

Abstract

Superfluid helium's low-loss dielectric properties, excellent thermal conductivity, and unique collective excitations make it an attractive candidate to incorporate into superconducting qubit systems. We controllably immerse a three-dimensional superconducting transmon qubit in superfluid He4 and measure the spectroscopic and coherence properties of the system. We find that the cavity, the qubit, and their coupling are all modified by the superfluid, which we analyze within the framework of circuit quantum electrodynamics. At temperatures relevant to quantum computing experiments, the energy relaxation time of the qubit is not significantly changed by the presence of the superfluid, while the pure dephasing time modestly increases, which we attribute to improved thermalization of the microwave environment via the superfluid.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
1 More
  • Received 17 July 2019

DOI:https://doi.org/10.1103/PhysRevA.101.012336

©2020 American Physical Society

Physics Subject Headings (PhySH)

Quantum Information, Science & TechnologyCondensed Matter, Materials & Applied Physics

Authors & Affiliations

J. R. Lane1, D. Tan2,3, N. R. Beysengulov1, K. Nasyedkin1, E. Brook1, L. Zhang1, T. Stefanski1, H. Byeon1, K. W. Murch2,4, and J. Pollanen1,*

  • 1Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824-2320, USA
  • 2Department of Physics, Washington University in St. Louis, St. Louis, Missouri 63130, USA
  • 3Shenzhen Institute for Quantum Science and Engineering and Department of Physics, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
  • 4Institute for Materials Science & Engineering, Washington University in St. Louis, 1 Brookings Dr., St. Louis, Missouri 63130, USA

  • *pollanen@pa.msu.edu

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 101, Iss. 1 — January 2020

Reuse & Permissions
Access Options
CHORUS

Article Available via CHORUS

Download Accepted Manuscript
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review A

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×