Andreev probe of persistent current states in superconducting quantum circuits

Andreev probe of persistent current states in superconducting quantum circuits

Using the extraordinary sensitivity of Andreev interferometers to the superconducting phase difference associated with currents, we measure the persistent current quantum states in superconducting loops interrupted by Josephson junctions. Straightforward electrical resistance measurements of the int...

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Veröffentlicht in:Physical review letters 2005-09, Vol.95 (14), p.147001.1-147001.4, Article 147001
Hauptverfasser: PETRASHOV, V. T, CHUA, K. G, MARSHALL, K. M, SHAIKHAIDAROV, R. Sh, NICHOLLS, J. T
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Sprache:eng
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Applied sciences
Design. Technologies. Operation analysis. Testing
Electronics
Exact sciences and technology
Integrated circuits
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
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container_end_page 147001.4
container_issue 14
container_start_page 147001.1
container_title Physical review letters
container_volume 95
creator PETRASHOV, V. T
CHUA, K. G
MARSHALL, K. M
SHAIKHAIDAROV, R. Sh
NICHOLLS, J. T
description Using the extraordinary sensitivity of Andreev interferometers to the superconducting phase difference associated with currents, we measure the persistent current quantum states in superconducting loops interrupted by Josephson junctions. Straightforward electrical resistance measurements of the interferometers give a continuous readout of the states, allowing us to construct the energy spectrum of the quantum circuit. The probe is estimated to be more precise and faster than previous methods, and can measure the local phase difference in a wide range of superconducting circuits.
doi_str_mv 10.1103/PhysRevLett.95.147001
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subjects Applied sciences
Design. Technologies. Operation analysis. Testing
Electronics
Exact sciences and technology
Integrated circuits
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
title Andreev probe of persistent current states in superconducting quantum circuits
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