Quantum information processing using frequency control of impurity spins in diamond

A. M. Zagoskin, J. R. Johansson, Sahel Ashhab, Franco Nori

Research output: Contribution to journalArticle

12 Citations (Scopus)

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 provide a theoretical demonstration, 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.

Original languageEnglish
Article number014122
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume76
Issue number1
DOIs
Publication statusPublished - 30 Jul 2007
Externally publishedYes

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frequency control
Diamond
Vacancies
Diamonds
Nitrogen
Demonstrations
diamonds
Impurities
impurities
Temperature
optical resonance
optical control
quantum computation
manipulators
degrees of freedom
solid state
nitrogen
cavities
room temperature

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Quantum information processing using frequency control of impurity spins in diamond. / Zagoskin, A. M.; Johansson, J. R.; Ashhab, Sahel; Nori, Franco.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 76, No. 1, 014122, 30.07.2007.

Research output: Contribution to journalArticle

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