Published June 1, 2018 | Version v1
Journal article Metadata-only

Characterization of barrier-tunable radio-frequency-SQUID for Maxwell's demon experiment

Creators

  • 1. Tsinghua National Laboratory for Information Science and Technology, Department of Microelectronics and Nanoelectronics, Institute of Microelectronics, Tsinghua University, Beijing 100084 (China)
  • 2. Department of Physics and Astronomy, University of Kansas, Lawrence, Kansas 66045 (United States)

Description

We present the design, fabrication, and characterization of a barrier-tunable superconducting quantum interference device (SQUID) qubit for the study of Maxwell's demon experiment. In this work, a compound Josephson junction (CJJ) radio-frequency (RF)-SQUID qubit with an overdamped resistively shunted direct-current (DC)-SQUID magnetometer is used to continuously monitor the state of the qubit. The circuit is successfully fabricated with the standard Nb/Al-AlOx/Nb trilayer process of our laboratory and characterized in a low noise measurement system, which is capable of measuring coherent dynamics of superconducting qubits, in an Oxford dilution refrigerator. All circuit parameters are determined accurately by fitting experimental data to theoretical analysis and simulation, which allows us to make a quantitative comparison between the results of the experiment and theory. (paper)

Availability note (English)

Available from http://dx.doi.org/10.1088/1674-1056/27/6/068501

Additional details

Identifiers

DOI
10.1088/1674-1056/27/6/068501;

Publishing Information

Journal Title
Chinese Physics. B
Journal Volume
27
Journal Issue
6
Journal Page Range
[6 p.]
ISSN
1674-1056

INIS

Country of Publication
China
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
52036416
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Descriptors DEI
ALUMINIUM; ALUMINIUM OXIDES; COMPARATIVE EVALUATIONS; DILUTION; DIRECT CURRENT; JOSEPHSON JUNCTIONS; LAYERS; MAGNETOMETERS; NIOBIUM; QUBITS; RADIOWAVE RADIATION; SIMULATION; SQUID DEVICES
Descriptors DEC
ALUMINIUM COMPOUNDS; CHALCOGENIDES; CURRENTS; ELECTRIC CURRENTS; ELECTROMAGNETIC RADIATION; ELECTRONIC EQUIPMENT; ELEMENTS; EQUIPMENT; EVALUATION; FLUXMETERS; INFORMATION; MEASURING INSTRUMENTS; METALS; MICROWAVE EQUIPMENT; OXIDES; OXYGEN COMPOUNDS; QUANTUM INFORMATION; RADIATIONS; REFRACTORY METALS; SUPERCONDUCTING DEVICES; SUPERCONDUCTING JUNCTIONS; TRANSITION ELEMENTS; TUNNEL JUNCTIONS