Aufgrund von Vorbereitungen auf eine neue Version von KOPS, können am Montag, 6.2. und Dienstag, 7.2. keine Publikationen eingereicht werden. (Due to preparations for a new version of KOPS, no publications can be submitted on Monday, Feb. 6 and Tuesday, Feb. 7.)
Type of Publication: | Journal article |
Publication status: | Published |
URI (citable link): | http://nbn-resolving.de/urn:nbn:de:bsz:352-2-lui396o8ovxg2 |
Author: | Rastelli, Gianluca; Pop, Ioan M. |
Year of publication: | 2018 |
Published in: | Physical Review B ; 97 (2018), 20. - 205429. - ISSN 2469-9950. - eISSN 2469-9969 |
ArXiv-ID: | arXiv:1712.07605v2 |
DOI (citable link): | https://dx.doi.org/10.1103/PhysRevB.97.205429 |
Summary: |
We propose a scheme to implement a tunable, wide frequency-band dissipative environment using a double chain of Josephson junctions. The two parallel chains consist of identical superconducting quantum interference devices (SQUIDs), with magnetic-flux tunable inductance, coupled to each other at each node via a capacitance much larger than the junction capacitance. Thanks to this capacitive coupling, the system sustains electromagnetic modes with a wide frequency dispersion. The internal quality factor of the modes is maintained as high as possible, and the damping is introduced by a uniform coupling of the modes to a transmission line, itself connected to an amplification and readout circuit. For sufficiently long chains, containing several thousands of junctions, the resulting admittance is a smooth function versus frequency in the microwave domain, and its effective dissipation can be continuously monitored by recording the emitted radiation in the transmission line. We show that by varying in situ the SQUIDs' inductance, the double chain can operate as a tunable ohmic resistor in a frequency band spanning up to 1 GHz, with a resistance that can be swept through values comparable to the resistance quantum Rq=h/(4e2)≃6.5kΩ. We argue that the circuit complexity is within reach using current Josephson junction technology.
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Subject (DDC): | 530 Physics |
Link to License: | In Copyright |
Bibliography of Konstanz: | Yes |
Refereed: | Yes |
RASTELLI, Gianluca, Ioan M. POP, 2018. Tunable ohmic environment using Josephson junction chains. In: Physical Review B. 97(20), 205429. ISSN 2469-9950. eISSN 2469-9969. Available under: doi: 10.1103/PhysRevB.97.205429
@article{Rastelli2018Tunab-42447, title={Tunable ohmic environment using Josephson junction chains}, year={2018}, doi={10.1103/PhysRevB.97.205429}, number={20}, volume={97}, issn={2469-9950}, journal={Physical Review B}, author={Rastelli, Gianluca and Pop, Ioan M.}, note={Article Number: 205429} }
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