Quantum devices often suffer from reflections and noise during readout, a problem traditionally addressed by magneto-optical isolators and circulators. However, these solutions are hindered by limited bandwidth, low tunability, high losses, and incompatibility with planar technologies like circuit QED. To overcome these challenges, we introduce an approach to quantum non-reciprocity, leveraging the inherent nonlinearity of qubits and spatial symmetry disruption. Our method transforms a circuit with Lorentz-type qubits into one with Fano-type qubits, which exhibit an asymmetric spectral response. This transformation leads to a significant enhancement in isolation (up to 40 dB) and a doubling of spectral bandwidth (up to 200 MHz). We base our analysis on realistic circuit parameters and substantiate it with existing experimental results and comprehensive quantum simulations. Our research paves the way for creating compact, high-performance, planar-compatible non-reciprocal quantum devices. These devices could revolutionize quantum computing, communication, and sensing by offering improved noise protection and broader bandwidth.
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26 June 2023
Research Article|
June 27 2023
Fano-qubits for quantum devices with enhanced isolation and bandwidth
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Deepanshu Trivedi
;
Deepanshu Trivedi
(Data curation, Formal analysis, Investigation, Software, Writing – original draft)
1
Department of Electrical and Computer Engineering, Florida International University
, Miami, Florida 33174, USA
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Leonid Belostotski
;
Leonid Belostotski
(Conceptualization, Formal analysis, Project administration, Writing – review & editing)
2
Department of Electrical and Software Engineering, University of Calgary
, Calgary, Alberta T2N 1N4, Canada
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Arjuna Madanayake
;
Arjuna Madanayake
(Formal analysis, Funding acquisition, Methodology, Project administration, Writing – review & editing)
1
Department of Electrical and Computer Engineering, Florida International University
, Miami, Florida 33174, USA
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Alex Krasnok
Alex Krasnok
a)
(Conceptualization, Formal analysis, Supervision, Writing – review & editing)
1
Department of Electrical and Computer Engineering, Florida International University
, Miami, Florida 33174, USA
a)Author to whom correspondence should be addressed: [email protected]
Search for other works by this author on:
Deepanshu Trivedi
1
Leonid Belostotski
2
Arjuna Madanayake
1
Alex Krasnok
1,a)
1
Department of Electrical and Computer Engineering, Florida International University
, Miami, Florida 33174, USA
2
Department of Electrical and Software Engineering, University of Calgary
, Calgary, Alberta T2N 1N4, Canada
a)Author to whom correspondence should be addressed: [email protected]
Note: This paper is part of the APL Special Collection on Advances in Superconducting Logic.
Appl. Phys. Lett. 122, 264003 (2023)
Article history
Received:
March 17 2023
Accepted:
June 12 2023
Citation
Deepanshu Trivedi, Leonid Belostotski, Arjuna Madanayake, Alex Krasnok; Fano-qubits for quantum devices with enhanced isolation and bandwidth. Appl. Phys. Lett. 26 June 2023; 122 (26): 264003. https://doi.org/10.1063/5.0151047
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