Journal Article

FZJ-2022-02200

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Recent Developments in Quantum‐Circuit Refrigeration

Mörstedt, T. F. (Corresponding author) ; Viitanen, A. ; Vadimov, V. ; Sevriuk, V. ; Partanen, M. ; Hyyppä, E. ; Catelani, G.FZJ* ; Silveri, M. ; Tan, K. Y. ; Möttönen, M.

2022
Barth Leipzig

This record in other databases:    

Please use a persistent id in citations: http://hdl.handle.net/2128/31571  doi:10.1002/andp.202100543

Abstract: The recent progress in direct active cooling of the quantum-electric degrees of freedom in engineered circuits, or quantum-circuit refrigeration is reviewed. In 2017, the discovery of a quantum-circuit refrigerator (QCR) based on photon-assisted tunneling of quasiparticles through normal-metal–insulator–superconductor junctions inspired a series of experimental studies demonstrating the following main properties: i) the direct-current (dc) bias voltage of the junction can change the QCR-induced damping rate of a superconducting microwave resonator by orders of magnitude and give rise to nontrivial Lamb shifts, ii) the damping rate can be controlled in nanosecond time scales, and ii) the dc bias can be replaced by a microwave excitation, the amplitude of which controls the induced damping rate. Theoretically, it is predicted that state-of-the-art superconducting resonators and qubits can be reset with an infidelity lower than 10−4 in tens of nanoseconds using experimentally feasible parameters. A QCR-equipped resonator has also been demonstrated as an incoherent photon source with an output temperature above 1 K yet operating at millikelvin. This source has been used to calibrate cryogenic amplification chains. In the future, the QCR may be experimentally used to quickly reset superconducting qubits, and hence assist in the great challenge of building a practical quantum computer.

---

Contributing Institute(s):

1. JARA Institut Quanteninformation (PGI-11)

Research Program(s):

1. 5222 - Exploratory Qubits (POF4-522) (POF4-522)

Appears in the scientific report 2022

---

Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

---