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Exceptional-point-assisted entanglement, squeezing, and reset in a chain of three superconducting resonators
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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en
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13
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Physical Review Research, Volume 5, issue 3, pp. 1-13
Abstract
The interplay between coherent and dissipative dynamics required in various control protocols of quantum technology has motivated studies of open-system degeneracies, referred to as exceptional points (EPs). Here, we introduce a scheme for fast quantum-state synthesis using exceptional-point engineering in a lossy chain of three superconducting resonators. We theoretically find that the rich physics of EPs can be used to identify regions in the parameter space that favor a fast and quasistable transfer of squeezing and entanglement or a fast reset of the system. For weakly interacting resonators with the coupling strength g, the obtained quasistabilization timescales are identified as 1/(22g), and reset infidelities below 10-5 are obtained with a waiting time of roughly 6/g in the case of weakly squeezed resonators. Our results shed light on the role of EPs in multimode Gaussian systems and pave the way for optimized distribution of squeezing and entanglement between different nodes of a photonic network using dissipation as a resource.
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Funding Information: We acknowledge the Academy of Finland Centre of Excellence Program (Project No. 336810), European Research Council under Consolidator Grant No. 681311 (QUESS), and Advanced Grant No. 101053801 (ConceptQ). Publisher Copyright: © 2023 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. | openaire: EC/H2020/681311/EU//QUESS | openaire: EC/HE/101053801/EU//ConceptQ
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Teixeira, W S, Vadimov, V, Mörstedt, T, Kundu, S & Möttönen, M 2023, 'Exceptional-point-assisted entanglement, squeezing, and reset in a chain of three superconducting resonators', Physical Review Research, vol. 5, no. 3, 033119, pp. 1-13. https://doi.org/10.1103/PhysRevResearch.5.033119