Ultrafast optical control of semiconductor spin qubits toward ...
Ultrafast optical control of semiconductor spin qubits toward ...
Ultrafast optical control of semiconductor spin qubits toward ...
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Spin Initialization and Measurement<br />
D. Press et al., Nature 456, 218 (2008)<br />
Optical pumping + Rotation pulse <strong>of</strong> Θ = π<br />
pump laser<br />
Population in<br />
Single Photon<br />
Detection<br />
T = 1.5 K, B ext<br />
= 7 T<br />
Initialization fidelity:<br />
F 0<br />
= 92±7%<br />
Time for initialization:<br />
10 -3 sec (thermal equilibrium scheme) 10 -9 sec (<strong>optical</strong> pumping)<br />
10
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