2013/06/30 by Vahram L. Grigoryan, Jiang Xiao
Computer Science · Physics and Astronomy · #Condensed matter physics #Coupling (piping) #Coupling strength #Ferromagnetism #Hamiltonian (control theory) #Ising model #Materials science #Physics #Physics of Superconductivity and Magnetism #Quantum #Quantum Computing Algorithms and Architecture #Quantum and electron transport phenomena #Quantum dot #Quantum mechanics #RKKY interaction #Spin (aerodynamics) #cond-mat.mes-hall
paper · pdf · doi:10.1209/0295-5075/104/17008
arxiv created 2013/08/28 · openalex publication_date 2013/10/01 · arxiv updated 2015/06/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We carried out a nested Schrieffer-Wolff transformation of an Anderson two-impurity Hamiltonian to study the spin-spin coupling between two dynamical quantum dots under the influence of rotating transverse magnetic field. As a result of the rotating field, we predict a novel Ising type spin-spin coupling mechanism between quantum dots, whose strength is tunable via the magnitude of the rotating field. Due to its dynamical origin, this new coupling mechanism is qualitatively different from the all existing static couplings such as RKKY, while the strength could be comparable to the strength of the RKKY coupling. The dynamical coupling with the intristic RKKY coupling enables to construct a four-level system of maximally entangled Bell states in a controllable manner.