Improving the purity of one- and two-qubit gates by AC fields

  • We investigate the influence of AC driving fields on the coherence properties of one- and two-qubit gate operations. In both cases, we find that for suitable driving parameters, the gate purity improves significantly. A mapping of the time-dependent system-bath model to an effective static model provides analytical results. The resulting purity loss compares favorably with numerical results.

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Author:Sigmund KohlerORCiDGND, Peter HänggiORCiDGND
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Publishing Institution:Universität Augsburg
Release Date:2006/08/31
Tag:Quantum computation; decoherence; driven systems
GND-Keyword:Quantencomputer; Kohärenz
Source:erschienen in: Fortschritte der Physik 54, 804–819 (2006); DOI 10.1002/prop.200610314; URL:
Institutes:Mathematisch-Naturwissenschaftlich-Technische Fakultät
Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik
Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik / Lehrstuhl für Theoretische Physik I
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik