Robust control of entanglement in a nitrogen-vacancy center coupled to a C 13 nuclear spin in diamond

R. S. Said; J. Twamley

doi:10.1103/PhysRevA.80.032303

Robust control of entanglement in a nitrogen-vacancy center coupled to a C 13 nuclear spin in diamond

R. S. Said, J. Twamley

Macquarie University Research Centre in Quantum Science and Technology

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28 Citations (Scopus)

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Abstract

We address the problem of generating a robust entangling gate between electronic and nuclear spins in a system of a single nitrogen-vacancy center coupled to a nearest C 13 atom in diamond against certain types of systematic errors such as pulse-length and off-resonance errors. We analyze the robustness of various control schemes: sequential pulses, composite pulses and numerically optimized pulses. We find that numerically optimized pulses, produced by the modified gradient ascent pulse engineering (GRAPE) algorithm, are more robust than the composite pulses and the sequential pulses. The optimized pulses can also be implemented in a faster time than the composite pulses.

Original language	English
Article number	032303
Pages (from-to)	1-7
Number of pages	7
Journal	Physical Review A - Atomic, Molecular, and Optical Physics
Volume	80
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevA.80.032303
Publication status	Published - 1 Sept 2009

Bibliographical note

Said, R. S. and Twamley, J., Physical Review A, Vol. 80, article no. 032303, 2009. Copyright 2009 by the American Physical Society. The original article can be found at http://dx.doi.org/10.1103/PhysRevA.80.032303.

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Robust control of entanglement in a nitrogen-vacancy center coupled to a C 13 nuclear spin in diamond

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