2013/04/30 by Rui Li, J. Q. You, C. P. Sun +1 · 3 citations
Engineering · Physics and Astronomy · #Advancements in Semiconductor Devices and Circuit Design #Charge qubit #Condensed matter physics #Dipole #Electric field #Flux qubit #Magnetic dipole #Nanowire #Phase qubit #Physics #Physics of Superconductivity and Magnetism #Quantum #Quantum and electron transport phenomena #Quantum mechanics #Qubit #Rabi cycle #Rabi frequency #Resonance (particle physics) #Spin (aerodynamics) #Spin–orbit interaction #cond-mat.mes-hall #quant-ph
paper · pdf · doi:10.1103/physrevlett.111.086805
published as Phys. Rev. Lett. 111, 086805 (2013) · 5 pages, 3 figures + Supplementary Material
openalex publication_date 2013/08/23 · arxiv created 2013/09/04 · arxiv updated 2013/09/05 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
A semiconductor nanowire quantum dot with strong spin-orbit coupling (SOC) can be used to achieve a spin-orbit qubit. In contrast to a spin qubit, the spin-orbit qubit can respond to an external ac electric field, an effect called electric-dipole spin resonance. Here we develop a theory that can apply in the strong SOC regime. We find that there is an optimal SOC strength η(opt)=√2/2, where the Rabi frequency induced by the ac electric field becomes maximal. Also, we show that both the level spacing and the Rabi frequency of the spin-orbit qubit have periodic responses to the direction of the external static magnetic field. These responses can be used to determine the SOC in the nanowire.