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Please use this identifier to cite or link to this item: http://nbn-resolving.de/urn:nbn:de:hebis:34-2014103046201

Title: Optimal control theory for a unitary operation under dissipative evolution
Authors: Goerz, Michael H.Reich, Daniel M.Koch, Christiane P.
???metadata.dc.subject.ddc???: 530 - Physik (Physics)
Issue Date: 2014
Citation: In: New journal of physics. - London : IOP, 2014, 16, 055012 , 1-28
Abstract: We show that optimizing a quantum gate for an open quantum system requires the time evolution of only three states irrespective of the dimension of Hilbert space. This represents a significant reduction in computational resources compared to the complete basis of Liouville space that is commonly believed necessary for this task. The reduction is based on two observations: the target is not a general dynamical map but a unitary operation; and the time evolution of two properly chosen states is sufficient to distinguish any two unitaries. We illustrate gate optimization employing a reduced set of states for a controlled phasegate with trapped atoms as qubit carriers and a iSWAP gate with superconducting qubits.
URI: urn:nbn:de:hebis:34-2014103046201
additional URI: doi:10.1088/1367-2630/16/5/055012OA-GEF
ISSN: 1367-2630
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