From Coulomb-Blockade to Nonlinear Quantum Dynamics in a Superconducting Circuit with a Resonator

Vera Gramich, Björn Kubala, Selina Rohrer, and Joachim Ankerhold
Phys. Rev. Lett. 111, 247002 – Published 9 December 2013
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Abstract

Motivated by recent experiments on superconducting circuits consisting of a dc-voltage-biased Josephson junction in series with a resonator, quantum properties of these devices far from equilibrium are studied. This includes a crossover from a domain of incoherent to a domain of coherent Cooper pair tunneling, where the circuit realizes a driven nonlinear oscillator. Equivalently, weak photon-charge coupling turns into strong correlations captured by a single degree of freedom. Radiated photons offer a new tool to monitor charge flow and current noise gives access to nonlinear dynamics, which allows us to analyze quantum-classical boundaries.

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  • Received 10 July 2013

DOI:https://doi.org/10.1103/PhysRevLett.111.247002

© 2013 American Physical Society

Authors & Affiliations

Vera Gramich*, Björn Kubala, Selina Rohrer, and Joachim Ankerhold

  • Institut für Theoretische Physik, Universität Ulm, Albert-Einstein-Allee 11, 89069 Ulm, Germany

  • *vera.gramich@uni-ulm.de

See Also

Universal Quantum Fluctuations of a Cavity Mode Driven by a Josephson Junction

A. D. Armour, M. P. Blencowe, E. Brahimi, and A. J. Rimberg
Phys. Rev. Lett. 111, 247001 (2013)

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Vol. 111, Iss. 24 — 13 December 2013

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