Valley Two-Qubit System in a <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" overflow="scroll"><mml:msub><mml:mrow><mml:mi>Mo</mml:mi><mml:mi mathvariant="normal">S</mml:mi></mml:mrow><mml:mn>2</mml:mn></mml:msub></mml:math>-Monolayer Gated Double Quantum dot

Abstract

This study addresses two hot topics in condensed matter physics: quantum computing and valleytronics. The authors propose a solid-state qubit exploiting the electronic valley degree in a monolayer transition-metal dichalcogenide (TMDC). Simulations show how to obtain single- and two-qubit gates in the valley two-qubit system by electrically controlling the state and the coupling between the two electrons confined in a gated double-quantum-dot structure. Both single- and two-qubit operations are explained, as well as initialization and readout. Thus the team obtains a physical scheme for universal quantum computing based on the valley isospin in gate-defined TMDC double quantum dots.

Topics & Concepts