Brookes, P;
Tancredi, G;
Patterson, AD;
Rahamim, J;
Esposito, M;
Mavrogordatos, TK;
Leek, PJ;
... Szymanska, MH; + view all
(2021)
Critical slowing down in circuit quantum electrodynamics.
Science Advances
, 7
(21)
10.1126/sciadv.abe9492.
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Abstract
Critical slowing down of the time it takes a system to reach equilibrium is a key signature of bistability in dissipative first-order phase transitions. Understanding and characterizing this process can shed light on the underlying many-body dynamics that occur close to such a transition. Here, we explore the rich quantum activation dynamics and the appearance of critical slowing down in an engineered superconducting quantum circuit. Specifically, we investigate the intermediate bistable regime of the generalized Jaynes-Cummings Hamiltonian (GJC), realized by a circuit quantum electrodynamics (cQED) system consisting of a transmon qubit coupled to a microwave cavity. We find a previously unidentified regime of quantum activation in which the critical slowing down reaches saturation and, by comparing our experimental results with a range of models, we shed light on the fundamental role played by the qubit in this regime.
| Type: | Article |
|---|---|
| Title: | Critical slowing down in circuit quantum electrodynamics |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1126/sciadv.abe9492 |
| Publisher version: | https://doi.org/10.1126/sciadv.abe9492 |
| Language: | English |
| Additional information: | Copyright © 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution License 4.0 (CC BY). |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10129750 |
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