Control of dephasing in spin qubits during coherent transport in silicon br

Article

关键词: QUANTUM-DOT;    CHARGE-NOISE;    SINGLE-ELECTRON;    INFORMATION;   

DOI  :  10.1103/PhysRevB.107.085427

来源: SCIE

【 摘 要 】

One of the key pathways toward scalability of spin-based quantum computing systems lies in achievinglong-range interactions between electrons and increasing their interconnectivity. Coherent spin transport is oneof the most promising strategies to achieve this architectural advantage. Experimental results have previouslydemonstrated high-fidelity transportation of spin qubits between two quantum dots in silicon and identifiedpossible sources of error. In this theoretical study, we investigate these errors and analyze the impact of tunnelcoupling, magnetic field, and spin-orbit effects on the spin transfer process. The interplay between these effectsgives rise to double dot configurations that include regimes of enhanced decoherence that should be avoided forquantum information processing. These conclusions permit us to extrapolate previous experimental conclusionsand rationalize the future design of large-scale quantum processors

【 授权许可】

Free