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Dobrovitski, V.V. (author), Feiguin, A.E. (author), Hanson, R. (author), Awschalom, D.D. (author)We study the Rabi oscillations decay of a spin decohered by a spin bath whose internal dynamics is caused by dipolar coupling between the bath spins. The form and rate of decay as a function of the intrabath coupling is obtained analytically, and confirmed numerically. The complex form of decay smoothly varies from power law to exponential, and...journal article 2009
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Fuchs, G.D. (author), Dobrovitski, V.V. (author), Hanson, R. (author), Batra, A. (author), Weis, C.D. (author), Schenkel, T. (author), Awschalom, D.D. (author)We use single-spin resonant spectroscopy to study the spin structure in the orbital excited state of a diamond nitrogen-vacancy (N-V) center at room temperature. The data show that the excited-state spin levels have a zero-field splitting that is approximately half of the value of the ground state levels, a g factor similar to the ground state...journal article 2008
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Dobrovitski, V.V. (author), Feiguin, A.E. (author), Awschalom, D.D. (author), Hanson, R. (author)We study decoherence of central spins by a spin bath, focusing on the difference between measurement of a single central spin and measurement of a large number of central spins (as found in typical spin-resonance experiments). For a dilute spin bath, the single spin demonstrates Gaussian free-induction decay, in contrast to exponential decay...journal article 2008