Heidelberg 2015 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 31: Poster: Quantum Optics and Photonics II
Q 31.58: Poster
Dienstag, 24. März 2015, 17:00–19:00, C/Foyer
indirect control of spin precession by electric field via spin-orbit coupling — •liping yang1,3 and changpu sun2,3 — 1State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics and University of the Chinese Academy of Sciences, Beijing 100190, People's Republic of China — 2Beijing Computational Science Research Center, Beijing 100084, China — 3Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
The spin-orbit coupling (SOC) can mediate electric-dipole spin resonance (EDSR) within an a.c. electric field. By applying a quantum linear coordinate transformation, we find that the essence of EDSR could be understood as a spin precession under an effective a.c. magnetic field induced by the SOC in the reference frame, which is exactly following the classical trajectory of this spin. Based on this observation, we find an upper limit for the spin-flipping speed in the EDSR-based control of spin. For two-dimensional case, the azimuthal dependence of the effective magnetic field can be used to measure the ratio of the Rashba and Dresselhaus SOC strengths.