Spin coherent read, write, manipulation of electrons with light in solids

Hideo Kosaka, H. Shigyou, T. Inagaki, Y. Mitsumori, K. Edamatsu, T. Kutsuwa, M. Kuwahara, K. Ono, Y. Rikitake, N. Yokoshi, H. Imamura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Spin is a quantum property of electrons. For spin-based quantum information technology, preparation and read-out of the electron spin state should be spin coherent. We demonstrate that the polarization coherence of light can be transferred to the spin coherence of electrons in a semiconductor quantum nanostructure, and the prepared coherence of the electron spin can also be read out with light by the developed tomographic Kerr rotation method. We also demonstrate that a single photon is efficiently converted (∼27%) into a single electron trapped in a gate-defined quantum dot, where the g-factor of electrons is tuned to zero, and the charge state is detected with an adjacent quantum point contact without destructing the spin state. We further demonstrate that the spin coherence of a single electron trapped in one of double quantum dots is electrically manipulated with a microwave applied to the gate and read out via the Pauli spin blockade phenomenon. All of these functions are needed to build all semiconductor quantum repeaters and distributed quantum computers.

Original languageEnglish
Title of host publicationQuantum Communication, Measurement and Computing, QCMC 2010 - The Tenth International Conference
Pages165-168
Number of pages4
DOIs
Publication statusPublished - 2011 Nov 16
Event10th International Conference on Quantum Communication, Measurement And Computing, QCMC 2010 - Brisbane, QLD, Australia
Duration: 2010 Jul 192010 Jul 23

Publication series

NameAIP Conference Proceedings
Volume1363
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other10th International Conference on Quantum Communication, Measurement And Computing, QCMC 2010
CountryAustralia
CityBrisbane, QLD
Period10/7/1910/7/23

Keywords

  • photon polarization
  • quantum dot
  • quantum interface
  • quantum state transfer
  • quantum well
  • spin coherence

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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  • Cite this

    Kosaka, H., Shigyou, H., Inagaki, T., Mitsumori, Y., Edamatsu, K., Kutsuwa, T., Kuwahara, M., Ono, K., Rikitake, Y., Yokoshi, N., & Imamura, H. (2011). Spin coherent read, write, manipulation of electrons with light in solids. In Quantum Communication, Measurement and Computing, QCMC 2010 - The Tenth International Conference (pp. 165-168). (AIP Conference Proceedings; Vol. 1363). https://doi.org/10.1063/1.3630172