Dresden 2014 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 39: Transport: Quantum Coherence and Quantum Information Systems - Theory II

TT 39.3: Talk

Tuesday, April 1, 2014, 11:15–11:30, BEY 81

Quantum annealing with qubits with poor decoherence properties — •Michael Marthaler, Philipp Rudo, Johannes Janssen, Matthias Hecker, and Gerd Schön — Institut für Theoretische Festkörperphysik, KIT, Karlsruhe

We analyse adiabatic quantum computing, and assume that each qubit is strongly coupled to an environment. This allows us to model the time evolution of the system simply as a rate equation. The coupling to the environment creates qubit flips, weighted by the energy differences of the eigenstates of the system. The resulting equation can be efficiently simulated by using kinetic monte carlo methods, even for rather large systems. We use our method to explicitly study recent experiments on 108 rf-SQUIDs.