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Critical slowing down in circuit quantum electrodynamics

Brookes, Paul (author)
University College London (UCL)
Tancredi, Giovanna, 1981 (author)
University Of Oxford,Chalmers tekniska högskola,Chalmers University of Technology
Patterson, Andrew D. (author)
University Of Oxford
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Rahamim, Joseph (author)
University Of Oxford
Esposito, Martina (author)
University Of Oxford
Mavrogordatos, Themistoklis K. (author)
Stockholms universitet,Fysikum,Stockholm University
Leek, Peter J. (author)
University Of Oxford
Ginossar, E. (author)
University of Surrey
Szymanska, Marzena H. (author)
University College London (UCL)
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 (creator_code:org_t)
American Association for the Advancement of Science (AAAS), 2021
2021
English.
In: Science advances. - : American Association for the Advancement of Science (AAAS). - 2375-2548. ; 7:21
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • 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.

Subject headings

NATURVETENSKAP  -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
NATURVETENSKAP  -- Fysik -- Annan fysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Other Physics Topics (hsv//eng)
NATURVETENSKAP  -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
NATURVETENSKAP  -- Fysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences (hsv//eng)

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