Optimal control of a qubit coupled to a non-Markovian environment

A central challenge for implementing quantum computing in the solid state is decoupling the qubits from the intrinsic noise of the material. We investigate the implementation of quantum gates for a paradigmatic, non-Markovian model: a single-qubit coupled to a two-level system that is exposed to a h...

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Bibliographic Details
Published in:Physical review letters 2009-03, Vol.102 (9), p.090401-090401, Article 090401
Main Authors: Rebentrost, P, Serban, I, Schulte-Herbrüggen, T, Wilhelm, F K
Format: Article
Language:English
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Summary:A central challenge for implementing quantum computing in the solid state is decoupling the qubits from the intrinsic noise of the material. We investigate the implementation of quantum gates for a paradigmatic, non-Markovian model: a single-qubit coupled to a two-level system that is exposed to a heat bath. We systematically search for optimal pulses using a generalization of the novel open systems gradient ascent pulse engineering algorithm. Next to the known optimal bias point of this model, there are optimal pulses which lead to high-fidelity quantum operations for a wide range of decoherence parameters.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.102.090401