Your browser doesn't support javascript.
loading
Passive Superconducting Circulator on a Chip.
Navarathna, Rohit; Le, Dat Thanh; Hamann, Andrés Rosario; Nguyen, Hien Duy; Stace, Thomas M; Fedorov, Arkady.
Afiliación
  • Navarathna R; ARC Centre for Engineered Quantum System, School of Mathematics and Physics, University of Queensland, Brisbane QLD 4072, Australia.
  • Le DT; ARC Centre for Engineered Quantum System, School of Mathematics and Physics, University of Queensland, Brisbane QLD 4072, Australia.
  • Hamann AR; ARC Centre for Engineered Quantum System, School of Mathematics and Physics, University of Queensland, Brisbane QLD 4072, Australia.
  • Nguyen HD; School of Mathematics and Physics, University of Queensland, Brisbane QLD 4072, Australia.
  • Stace TM; ARC Centre for Engineered Quantum System, School of Mathematics and Physics, University of Queensland, Brisbane QLD 4072, Australia.
  • Fedorov A; Analog Quantum Circuits Pty. Ltd., Brisbane QLD 4072, Australia.
Phys Rev Lett ; 130(3): 037001, 2023 Jan 20.
Article en En | MEDLINE | ID: mdl-36763376
ABSTRACT
An on-chip microwave circulator that is compatible with superconducting devices is a key element for scale up of superconducting circuits. Previous approaches to integrating circulators on chip involve either external driving that requires extra microwave lines or a strong magnetic field that would compromise superconductivity. Here we report the first proof-of-principle realization of a passive on-chip circulator that is made from a superconducting loop interrupted by three notionally identical Josephson junctions and is tuned with only dc control fields. Our experimental results show evidence for nonreciprocal scattering, and excellent agreement with theoretical simulations. We also present a detailed analysis of quasiparticle tunneling in our device using a hidden Markov model. By reducing the junction asymmetry and utilizing the known methods of protection from quasiparticles, we anticipate that Josephson-loop circulator will become ubiquitous in superconducting circuits.

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2023 Tipo del documento: Article País de afiliación: Australia

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2023 Tipo del documento: Article País de afiliación: Australia