Robust Decoupling Techniques to Extend Quantum Coherence in Diamond
Name
Ryan-2010-Robust Decoupling Techniques to Extend Quantum Coherence in Diamond.pdf
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610.65 KB
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Author(s)
Ryan, Colm A.
Hodges, Jonathan S.
Cory, David G.
Date Issued
November 2010
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Ryan, C. A., J. S. Hodges, and D. G. Cory. “Robust Decoupling Techniques to Extend Quantum Coherence in Diamond.” Physical Review Letters 105.20 (2010) : 200402. © 2010 The American Physical Society
Version
Final published version
Abstract
We experimentally demonstrate over 2 orders of magnitude increase in the room-temperature coherence time of nitrogen-vacancy centers in diamond by implementing decoupling techniques. We show that equal pulse spacing decoupling performs just as well as nonperiodic Uhrig decoupling and also allows us to take advantage of revivals in the echo to explore the longest coherence times. At short times, we can extend the coherence of particular quantum states out from T[subscript 2]*=2.7 μs out to an effective T[subscript 2]>340 μs. For preserving arbitrary states we show the experimental importance of using pulse sequences that compensate the imperfections of individual pulses for all input states through judicious choice of the phase of the pulses. We use these compensated sequences to enhance the echo revivals and show a coherence time of over 1.6 ms in ultrapure natural abundance [superscript 13]C diamond.
MIT Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.105.200402
