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Ultrafast coherent manipulation of trions in site-controlled nanowire quantum dots
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2016 (English)In: Operator Theory: Advances and Applications, ISSN 1004-4469, E-ISSN 2334-2536, Vol. 3, no 12, p. 1430-1435Article in journal (Refereed) Published
Abstract [en]

Physical implementations of large-scale quantum processors based on solid-state platforms benefit from realizations of quantum bits positioned in regular arrays. Self-assembled quantum dots are well established as promising candidates for quantum optics and quantum information processing, but they are randomly positioned. Site-controlled quantum dots, on the other hand, are grown in pre-defined locations but have not yet been sufficiently developed to be used as a platform for quantum information processing. In this paper, we demonstrate all-optical ultrafast complete coherent control of a qubit formed by the single-spin/trion states of a charged site-controlled nanowire quantum dot. Our results show that site-controlled quantum dots in nanowires are promising hosts of charged-exciton qubits and that these qubits can be cleanly manipulated in the same fashion as has been demonstrated in randomly positioned quantum dot samples. Our findings suggest that many of the related excitonic qubit experiments that have been performed over the past 15 years may work well in the more scalable, site-controlled systems, making them very promising for the realization of quantum hardware.

Place, publisher, year, edition, pages
Optical Society of America, 2016. Vol. 3, no 12, p. 1430-1435
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:kth:diva-200213DOI: 10.1364/OPTICA.3.001430ISI: 000390793900023Scopus ID: 2-s2.0-85007047547OAI: oai:DiVA.org:kth-200213DiVA, id: diva2:1070763
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QC 20170202

Available from: 2017-02-02 Created: 2017-01-23 Last updated: 2017-11-29Bibliographically approved

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Zwiller, Val

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