Quantum bath engineering of a high impedance microwave mode through quasiparticle tunneling.
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
21 Nov 2022
21 Nov 2022
Historique:
received:
05
05
2022
accepted:
04
11
2022
entrez:
22
11
2022
pubmed:
23
11
2022
medline:
23
11
2022
Statut:
epublish
Résumé
In microwave quantum optics, dissipation usually corresponds to quantum jumps, where photons are lost one by one. Here we demonstrate a new approach to dissipation engineering. By coupling a high impedance microwave resonator to a tunnel junction, we use the photoassisted tunneling of quasiparticles as a tunable dissipative process. We are able to adjust the minimum number of lost photons per tunneling event to be one, two or more, through a dc voltage. Consequently, different Fock states of the resonator experience different loss processes. Causality then implies that each state experiences a different energy (Lamb) shift, as confirmed experimentally. This photoassisted tunneling process is analogous to a photoelectric effect, which requires a quantum description of light to be quantitatively understood. This work opens up new possibilities for quantum state manipulation in superconducting circuits, which do not rely on the Josephson effect.
Identifiants
pubmed: 36414638
doi: 10.1038/s41467-022-34762-z
pii: 10.1038/s41467-022-34762-z
pmc: PMC9681747
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
7146Informations de copyright
© 2022. The Author(s).
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