Dresden 2017 – scientific programme
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DY: Fachverband Dynamik und Statistische Physik
DY 18: Brownian Motion / Noise (joint session DY/TT)
DY 18.5: Talk
Tuesday, March 21, 2017, 11:00–11:15, ZEU 147
Electronic and photonic counting statistics as probes of non-equilibrium quantum dynamics — •Björn Kubala1, Joachim Ankerhold1, and Andrew D. Armour2 — 1Institute for Complex Quantum Systems and IQST, Ulm University, Ulm, Germany — 2School of Physics and Astronomy, University of Nottingham, Nottingham, UK
The emission of radiation generated by the flow of charges through a mesoscopic conductor depends not just on the properties of the conductor itself, but also on those of its electromagnetic environment. Coupling a conductor to a high-quality electromagnetic cavity generates strong mutual feedback which can lead to novel far-from-equilibrium regimes where the charge current and the photon flux leaking out of the cavity are both determined by the nonlinear behavior of the combined system. Using a voltage-biased Josephson junction as an example, we investigate how the photonic and charge current statistics are related to each other and to the underlying coupled dynamics in the non-equilibrium regime. We demonstrate that there is a simple connection between the full counting statistics of the charges and the photons in the long time limit. We also show that measurements of photon statistics would signal the crossover from linear to nonlinear dynamics in the conductor-cavity hybrid through the emergence of highly coherent charge transport.
[1] B. Kubala, J. Ankerhold, and A. D. Armour, arXiv:1606.02200