Berlin 2014 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 11: Quantum effects: Entanglement and decoherence I

Q 11.7: Talk

Monday, March 17, 2014, 15:30–15:45, DO24 Reuter Saal

Dissipative preparation of entangled steady states — •Florentin Reiter and Anders S. Sørensen — QUANTOP, The Niels Bohr Institute, University of Copenhagen, Blegdamsvej 17, DK-2100 Copenhagen Ø, Denmark

Quantum information processing is mostly performed by unitary gate operations which suffer from decoherence and dissipation. This imposes strong limitations on the realization of quantum information tasks.

Engineering dissipation to carry out such tasks is considered an alternative way of quantum information processing which may have the potential to overcome the problems with the unitary approach. Previous theoretical studies have shown that dissipation indeed allows for an improvement of entangling operations [1]. More recently, the dissipative preparation of a maximally entangled steady state of two qubits has been demonstrated experimentally in ion traps [2].

We present recent progress towards more general dissipative operations, in particular in the direction of scalable generation of entanglement and improved robustness against noise.

[1] M. J. Kastoryano, F. Reiter, and A. S. Sørensen, Phys. Rev. Lett. 106, 090502 (2011).

[2] Y. Lin, J. P. Gaebler, F. Reiter, T. R. Tan, R. Bowler, A. S. Sørensen, D. Leibfried, and D. J. Wineland, to appear in Nature, doi:10.1038/nature12801.