Picosecond coherent optical manipulation of a single electron spin in a quantum dot


Journal Article

Most schemes for quantum information processing require fast single-qubit operations. For spin-based qubits, this involves performing arbitrary coherent rotations of the spin state on time scales much faster than the spin coherence time. By applying off-resonant, picosecond-scale optical pulses, we demonstrated the coherent rotation of a single electron spin through arbitrary angles up to π radians. We directly observed this spin manipulation using time-resolved Kerr rotation spectroscopy and found that the results are well described by a model that includes the electron-nuclear spin interaction. Measurements of the spin rotation as a function of laser detuning and intensity confirmed that the optical Stark effect is the operative mechanism.

Full Text

Duke Authors

Cited Authors

  • Berezovsky, J; Mikkelsen, MH; Stoltz, NG; Coldren, LA; Awschalom, DD

Published Date

  • April 18, 2008

Published In

Volume / Issue

  • 320 / 5874

Start / End Page

  • 349 - 352

Electronic International Standard Serial Number (EISSN)

  • 1095-9203

International Standard Serial Number (ISSN)

  • 0036-8075

Digital Object Identifier (DOI)

  • 10.1126/science.1154798

Citation Source

  • Scopus