Berlin 2015 – scientific programme

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DY: Fachverband Dynamik und Statistische Physik

DY 7: Correlated Electrons: Nonequilibrium Quantum Many-Body Systems 1 (joint session TT/ DY)

DY 7.8: Talk

Monday, March 16, 2015, 11:45–12:00, H 0104

Continuous monitoring of a quantum many-body system — •Thomas Kiendl¹, Vinay Ramasesh², Shay Hacohen-Gourgy², Irfan Siddiqi², and Florian Marquardt¹ — ¹Institut for Theoretical Physics, Universität Erlangen-Nürnberg, Staudtstraße 7, D-91058 Erlangen, Germany — ²QNL, University of California, Berkeley

At the heart of quantum mechanics lies the fact that a measurement causes back-action on the system itself. A prominent example is the quantum Zeno effect. Observing a system continuously with a large measurement strength freezes the system’s dynamics. We explore how such phenomena transfer to a quantum many-body system, employing a chain of qubits as an experimentally relevant example. Using the concept of weak, continuous measurements we investigate new timescales caused by continuous monitoring of the chain. In this context, we present new results on relaxation dynamics and thermalization for both integrable and non-integrable Hamiltonians.