Dresden 2011 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 47: Quantum Information: Quantum Computer

Q 47.2: Talk

Thursday, March 17, 2011, 10:45–11:00, BAR Schön

(contribution withdrawn) Quantum memories based on engineered dissipation — •Fernando Pastawski, Lucas Clemente, and Ignacio Cirac — Max-Planck-Institut für Quantenoptik Hans-Kopfermann-Str. 1 D-85748 Garching, Germany

Storing quantum information for long times without disruptions is a major requirement for most quantum information technologies. A very appealing approach is to use self-correcting Hamiltonians, i.e. tailoring local interactions among the qubits such that when the system is weakly coupled to a cold bath the thermalization process takes a long time. Here we propose an alternative but more powerful approach in which the coupling to a bath is engineered, so that dissipation protects the encoded qubit against more general kinds of errors. We show that the method can be implemented locally in four dimensional lattice geometries by means of a toric code, and propose a simple 2D set-up for proof of principle experiments.