https://doi.org/10.1140/epjb/e2014-50172-7
Regular Article
Entanglement of spin-orbit qubits induced by Coulomb interaction
1
State Key Laboratory of Theoretical Physics, Institute of
Theoretical Physics, Chinese Academy of Sciences, P.O. Box 2735, Beijing
100190, P.R.
China
2
Beijing Computational Science Research Center,
Beijing
100084, P.R.
China
a
e-mail: ynfang@itp.ac.cn
Received: 14 March 2014
Received in final form: 12 May 2014
Published online: 23 June 2014
Spin-orbit qubit (SOQ) is the dressed spin by the orbital degree of freedom through a strong spin-orbit coupling (SOC). We show that Coulomb interaction between two electrons in quantum dots located separately in two nanowires can efficiently induce quantum entanglement between two SOQs. But to achieve the highest possible value for two SOQs concurrence, strength of SOC and confining potential for the quantum dots should be tuned to an optimal ratio. The physical mechanism to achieve such quantum entanglement is based on the feasibility of the SOQ responding to the external electric field via an intrinsic electric dipole spin resonance.
Key words: Mesoscopic and Nanoscale Systems
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2014
