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dc.description.sponsorshipGefördert durch den Publikationsfonds der Universität Kassel
dc.subjectquantum dissipative systemseng
dc.subjectentanglement creationeng
dc.subjectoptimal control theoryeng
dc.titleOptimal control theory for a unitary operation under dissipative evolutioneng
dcterms.abstractWe 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.ger
dcterms.accessRightsopen access
dcterms.bibliographicCitationIn: New journal of physics. - London : IOP, 2014, 16, 055012 , 1-28
dcterms.creatorGoerz, Michael H.
dcterms.creatorReich, Daniel M.
dcterms.creatorKoch, Christiane P.

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