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Proceedings Paper

Applications of femtosecond pulse engineering in the control of excitons in quantum dots
Author(s): Reuble Mathew; Angela Gamouras; Eric Dilcher; Ajan P. Ramachandran; Hong Yi Shi Yang; Sabine Freisem; Dennis G. Deppe; Kimberley C. Hall
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Paper Abstract

Pulse shaping techniques are used to demonstrate quantum control of exciton qubits in InAs quantum dots. Linearly chirped laser pulses are used to demonstrate adiabatic rapid passage in a single quantum dot on a subpicosecond timescale. The observed dependence of the exciton inversion efficiency on the sign of the pulse chirp identifies phonons as the dominant source of dephasing, which can be suppressed for positive chirp at low temperatures. The use of optimal quantum control theory to engineer a single optical pulse to implement simultaneous π and 2π single qubit gates in two uncoupled quantum dots is demonstrated. This work will support the use of pulse shaping in solid-state quantum hardware.

Paper Details

Date Published: 28 August 2014
PDF: 7 pages
Proc. SPIE 9167, Spintronics VII, 916705 (28 August 2014); doi: 10.1117/12.2064789
Show Author Affiliations
Reuble Mathew, Dalhousie Univ. (Canada)
Angela Gamouras, Dalhousie Univ. (Canada)
Eric Dilcher, Dalhousie Univ. (Canada)
Ajan P. Ramachandran, Dalhousie Univ. (Canada)
Hong Yi Shi Yang, Dalhousie Univ. (Canada)
Sabine Freisem, CREOL, The College of Optics and Photonics, Univ. of Central Florida (United States)
Dennis G. Deppe, CREOL, The College of Optics and Photonics, Univ. of Central Florida (United States)
Kimberley C. Hall, Dalhousie Univ. (Canada)

Published in SPIE Proceedings Vol. 9167:
Spintronics VII
Henri-Jean Drouhin; Jean-Eric Wegrowe; Manijeh Razeghi, Editor(s)

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