Regensburg 2013 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 37: Quantum Coherence, Quantum Information Systems 1
TT 37.10: Talk
Wednesday, March 13, 2013, 12:00–12:15, H19
All optical control of the spin state in the NV−-center in diamond — •Florian Hilser — Department of Physics, University of Konstanz, D-78457 Konstanz, Germany
We describe an all-optical scheme for spin
manipulation in the ground-state triplet of the negatively charged
nitrogen-vacancy (NV) center in diamond.
Virtual optical excitation from the 3A2 ground
state into the 3E excited state allows for spin rotations by virtue of
the spin-spin interaction in the two-fold orbitally degenerate excited state.
We derive an effective Hamiltonian for optically induced
spin-flip transitions within the ground state spin triplet due to
off-resonant optical pumping.
Furthermore, we investigate the spin qubit formed by the Zeeman
sub-levels with spin projection mS = 0 and mS = −1 along the NV
axis around the ground state level anticrossing with regard to full optical control of
the electron spin.
Next we focus on cavity mediated coupling of different NV centers by extending this
scheme to derive an effective spin-spin-interaction between separate NV center ground
states due to exchange of a (virtual) cavity photon [1].
[1] Phys. Rev. B 86 125204