Clark, S.M., Fu, K. M.C., Zhang, Q., Ladd, T.D., Stanley, C. and Yamamoto, Y. (2009) Ultrafast optical spin echo for electron spins in semiconductors. Physical Review Letters, 102(24), (doi: 10.1103/PhysRevLett.102.247601)
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Abstract
Spin-based quantum computing and magnetic resonance techniques rely on the ability to measure the coherence time T-2 of a spin system. We report on the experimental implementation of all-optical spin echo to determine the T-2 time of a semiconductor electron-spin system. We use three ultrafast optical pulses to rotate spins an arbitrary angle and measure an echo signal as the time between pulses is lengthened. Unlike previous spin-echo techniques using microwaves, ultrafast optical pulses allow clean T-2 measurements of systems with dephasing times (T-2(*)) fast in comparison to the time scale for microwave control. This demonstration provides a step toward ultrafast optical dynamic decoupling of spin-based qubits.
Item Type: | Articles |
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Keywords: | GaAs, implementation, manipulation, physics, pulse, pulses, quantum dots, semiconductor, semiconductors, system, systems |
Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Stanley, Professor Colin |
Authors: | Clark, S.M., Fu, K. M.C., Zhang, Q., Ladd, T.D., Stanley, C., and Yamamoto, Y. |
Subjects: | Q Science > QC Physics |
College/School: | College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering |
Journal Name: | Physical Review Letters |
Journal Abbr.: | Phys. rev. letters |
Publisher: | American Physical Society |
ISSN: | 0031-9007 |
ISSN (Online): | 1079-7114 |
Published Online: | 19 June 2009 |
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