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Published Online September 14, 2006
Science DOI: 10.1126/science.1131871

Reports

Submitted on June 28, 2006
Accepted on August 23, 2006

Coherent Dynamics of Coupled Electron and Nuclear Spin Qubits in Diamond

L. Childress 1, M. V. Gurudev Dutt 1, J. M. Taylor 1, A. S. Zibrov 1, F. Jelezko 2, J. Wrachtrup 2, P. R. Hemmer 3, M. D. Lukin 1*

1 Department of Physics and Institute for Quantum Science and Engineering, Harvard University, Cambridge, MA 02138, USA.
2 Physikalisches Institut, Universtitat Stuttgart, Pfaffenwaldring 57 D-70550 Stuttgart, Germany.
3 Department of Electrical and Computer Engineering, Texas A&M University, College Station, TX 77843, USA.

* To whom correspondence should be addressed.
M. D. Lukin , E-mail: lukin{at}fas.harvard.edu

Understanding and controlling the complex environment of solid-state quantum bits is a central challenge in spintronics and quantum information science. Coherent manipulation of an individual electron spin associated with a nitrogen-vacancy (NV) center in diamond was used to gain insight into its local environment. We show that this environment is effectively separated into a set of individual, proximal 13C nuclear spins which are coupled coherently to the electron spin, and the remainder of the 13C nuclear spins, which cause the loss of coherence. The proximal nuclear spins can be addressed and coupled individually because of quantum back-action from the electron, which modifies their energy levels and magnetic moments, effectively distinguishing them from the rest of the nuclei. These results open the door to coherent manipulation of individual, isolated nuclear spins in a solid-state environment even at room temperature.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Multipartite Entanglement Among Single Spins in Diamond.
P. Neumann, N. Mizuochi, F. Rempp, P. Hemmer, H. Watanabe, S. Yamasaki, V. Jacques, T. Gaebel, F. Jelezko, and J. Wrachtrup (2008)
Science 320, 1326-1329
   Abstract »    Full Text »    PDF »
Coherent Dynamics of a Single Spin Interacting with an Adjustable Spin Bath.
R. Hanson, V. V. Dobrovitski, A. E. Feiguin, O. Gywat, and D. D. Awschalom (2008)
Science 320, 352-355
   Abstract »    Full Text »    PDF »
Quantum Register Based on Individual Electronic and Nuclear Spin Qubits in Diamond.
M. V. G. Dutt, L. Childress, L. Jiang, E. Togan, J. Maze, F. Jelezko, A. S. Zibrov, P. R. Hemmer, and M. D. Lukin (2007)
Science 316, 1312-1316
   Abstract »    Full Text »    PDF »


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Science. ISSN 0036-8075 (print), 1095-9203 (online)