| Issue |
EPL
Volume 89, Number 1, January 2010
|
|
|---|---|---|
| Article Number | 17008 | |
| Number of page(s) | 6 | |
| Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
| DOI | https://doi.org/10.1209/0295-5075/89/17008 | |
| Published online | 21 January 2010 | |
Dynamical bistability in the driven circuit QED
1
Physikalisches Institut, Albert-Ludwigs-Universität Freiburg - 79104 Freiburg, Germany, EU
2
Institut für Theoretische Physik, Heinrich-Heine-Universität Düsseldorf - 40225 Düsseldorf, Germany, EU
3
Freiburg Institute for Advanced Studies (FRIAS), Albert-Ludwigs-Universität Freiburg - 79104 Freiburg, Germany, EU
Corresponding author: vittorio.peano@physik.uni-freiburg.de
Received:
7
September
2009
Accepted:
15
December
2009
We show that the nonlinear response of a driven circuit quantum electrodynamics setup displays antiresonant multiphoton transitions, as recently observed in a transmon qubit device. By including photon leaking, we explain the lineshape by a perturbative and a semiclassical analysis. We derive a bistable semiclassical quasienergy surface whose lowest quasienergy eigenstate is squeezed, allowing to define a squeezing-dependent local effective temperature. We study the escape dynamics out of the metastable state and find signatures of dynamical tunneling, similar as for the quantum Duffing oscillator.
PACS: 78.47.-P – Spectroscopy of solid state dynamics / 74.50.+r – Tunneling phenomena; point contacts, weak links, Josephson effects / 42.50.Pq – Cavity quantum electrodynamics; micromasers
© EPLA, 2010
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