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Zel’dovich amplification in a superconducting circuit

Zel’dovich amplification in a superconducting circuit
Zel’dovich amplification in a superconducting circuit

Zel'dovich proposed that electromagnetic (EM) waves with angular momentum reflected from a rotating metallic, lossy cylinder will be amplified. However, we are still lacking a direct experimental EM-wave verification of this fifty-year-old prediction due to the challenging conditions in which the phenomenon manifests itself: The mechanical rotation frequency of the cylinder must be comparable with the EM oscillation frequency. Here, we propose an experimental approach that solves this issue and is predicted to lead to a measurable Zel'dovich amplification with existing superconducting circuit technology. We design a superconducting circuit with low frequency EM modes that couple through free space to a magnetically levitated and spinning microsphere placed at the center of the circuit. We theoretically estimate the circuit EM mode gain and show that rotation of the microsphere can lead to experimentally observable amplification, thus paving the way for the first EM-field experimental demonstration of Zel'dovich amplification.

1079-7114
Braidotti, Maria Chiara
6b3ddc8d-7584-423b-ad71-4a9f6712a440
Vinante, Andrea
f023d600-0537-41c4-b307-bf9cdfc1f56c
Gasbarri, Giulio
1f6df418-5a22-4ec4-b24e-68aa10e0a684
Faccio, Daniele
6bcdf9b3-ee18-4227-9daa-054e6912ab7c
Ulbricht, Hendrik
5060dd43-2dc1-47f8-9339-c1a26719527d
Braidotti, Maria Chiara
6b3ddc8d-7584-423b-ad71-4a9f6712a440
Vinante, Andrea
f023d600-0537-41c4-b307-bf9cdfc1f56c
Gasbarri, Giulio
1f6df418-5a22-4ec4-b24e-68aa10e0a684
Faccio, Daniele
6bcdf9b3-ee18-4227-9daa-054e6912ab7c
Ulbricht, Hendrik
5060dd43-2dc1-47f8-9339-c1a26719527d

Braidotti, Maria Chiara, Vinante, Andrea, Gasbarri, Giulio, Faccio, Daniele and Ulbricht, Hendrik (2020) Zel’dovich amplification in a superconducting circuit. Physical Review Letters, 125 (14), [140801]. (doi:10.1103/PhysRevLett.125.140801).

Record type: Article

Abstract

Zel'dovich proposed that electromagnetic (EM) waves with angular momentum reflected from a rotating metallic, lossy cylinder will be amplified. However, we are still lacking a direct experimental EM-wave verification of this fifty-year-old prediction due to the challenging conditions in which the phenomenon manifests itself: The mechanical rotation frequency of the cylinder must be comparable with the EM oscillation frequency. Here, we propose an experimental approach that solves this issue and is predicted to lead to a measurable Zel'dovich amplification with existing superconducting circuit technology. We design a superconducting circuit with low frequency EM modes that couple through free space to a magnetically levitated and spinning microsphere placed at the center of the circuit. We theoretically estimate the circuit EM mode gain and show that rotation of the microsphere can lead to experimentally observable amplification, thus paving the way for the first EM-field experimental demonstration of Zel'dovich amplification.

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Zel’dovich amplification in a superconducting circuit - Accepted Manuscript
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Accepted/In Press date: 19 August 2020
e-pub ahead of print date: 2 October 2020
Published date: 2 October 2020
Additional Information: Funding Information: D. F. and M. C. B. acknowledge financial support from EPSRC (U.K. Grant No. EP/P006078/2) and the European Union’s Horizon 2020 research and innovation programme under Grant Agreement No. 820392. H. U., A. V., and G. G. acknowledge financial support from the EU H2020 FET project TEQ (Grant No. 766900) and the Leverhulme Trust (RPG-2016-046). A. V. thanks Iacopo Carusotto for helpful discussions. Publisher Copyright: © 2020 UK. Published by the American Physical Society.

Identifiers

Local EPrints ID: 443667
URI: http://eprints.soton.ac.uk/id/eprint/443667
ISSN: 1079-7114
PURE UUID: d84b2e5f-7dec-4aa5-b962-ff0c1c1a0169
ORCID for Andrea Vinante: ORCID iD orcid.org/0000-0002-9385-2127
ORCID for Hendrik Ulbricht: ORCID iD orcid.org/0000-0003-0356-0065

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Date deposited: 08 Sep 2020 16:30
Last modified: 18 Oct 2022 01:41

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Contributors

Author: Maria Chiara Braidotti
Author: Andrea Vinante ORCID iD
Author: Giulio Gasbarri
Author: Daniele Faccio

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