Quantum information processing using frequency control of impurity spins in diamond
Abstract
Spin degrees of freedom of charged nitrogen-vacancy (NV) centers in diamond have large decoherence times even at room temperature, can be initialized and read out using optical fields, and are therefore a promising candidate for solid state qubits. Recently, quantum manipulations of NV- centers using RF fields were experimentally realized. In this paper we show; first, that such operations can be controlled by varying the frequency of the signal, instead of its amplitude, and NV- centers can be selectively addressed even with spacially uniform RF signals; second, that when several \NV - centers are placed in an off-resonance optical cavity, a similar application of classical optical fields provides a controlled coupling and enables a universal two-qubit gate (CPHASE). RF and optical control together promise a scalable quantum computing architecture.
Cite
@article{arxiv.cond-mat/0703170,
title = {Quantum information processing using frequency control of impurity spins in diamond},
author = {A. M. Zagoskin and J. R. Johansson and S. Ashhab and Franco Nori},
journal= {arXiv preprint arXiv:cond-mat/0703170},
year = {2009}
}