TY - JOUR
T1 - Dynamics of Overhauser Field under nuclear spin diffusion in a quantum dot
JF - New Journal of Physics
Y1 - 2011
A1 - Zhe-Xuan Gong
A1 - Zhang-qi Yin
A1 - L. -M. Duan
AB - The coherence of electron spin can be significantly enhanced by locking the Overhauser field from nuclear spins using the nuclear spin preparation. We propose a theoretical model to calculate the long time dynamics of the Overhauser field under intrinsic nuclear spin diffusion in a quantum dot. We obtain a simplified diffusion equation that can be numerically solved and show quantitatively how the Knight shift and the electron-mediated nuclear spin flip-flop affect the nuclear spin diffusion. The results explain several recent experimental observations, where the decay time of Overhauser field is measured under different configurations, including variation of the external magnetic field, the electron spin configuration in a double dot, and the initial nuclear spin polarization rate.
VL - 13
U4 - 033036
UR - http://arxiv.org/abs/0912.4322v1
CP - 3
J1 - New J. Phys.
U5 - 10.1088/1367-2630/13/3/033036
ER -