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Enhancement of electron spin coherence by optical preparation of nuclear spins
Dimitrije Stepanenko, Guido Burkard, Geza Giedke +1
We study a large ensemble of nuclear spins interacting with a single electron spin in a quantum dot under optical excitation and photon detection. When a pair of applied laser fiel…
Knight Field Enabled Nuclear Spin Polarization in Single Quantum Dots
C. W. Lai, P. Maletinsky, A. Badolato +1
We demonstrate dynamical nuclear spin polarization in the absence of an external magnetic field, by resonant circularly polarized optical excitation of a single electron or hole ch…
Quantum measurement of a mesoscopic spin ensemble
G. Giedke, J. M. Taylor, D. D'Alessandro +2
We describe a method for precise estimation of the polarization of a mesoscopic spin ensemble by using its coupling to a single two-level system. Our approach requires a minimal nu…