Toward Valley‐Coupled Spin Qubits. Issue 6 (13th May 2020)

• Record Type: Journal Article
• Authors: Goh, Kuan Eng Johnson; Bussolotti, Fabio; Lau, Chit Siong; Kotekar‐Patil, Dharmraj; Ooi, Zi En; Chee, Jing Yee
• Is Part Of: Advanced quantum technologies. Volume 3:Issue 6(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-05-13
• Subjects: quantum dots -- quantum information -- qubits -- transition metal dichalcogenides -- valleytronics; Quantum theory -- Periodicals; Quantum computing -- Periodicals; Quantum chemistry -- Periodicals; Quantum electronics -- Periodicals; 537.5
• DOI: 10.1002/qute.201900123
• Languages: English
• ISSNs: 2511-9044

Abstract

Abstract: The bid for scalable physical qubits has attracted many possible candidate platforms. In particular, spin‐based qubits in solid‐state form factors are attractive as they could potentially benefit from processes similar to those used for conventional semiconductor processing. However, material control is a significant challenge for solid‐state spin qubits as residual spins from substrate, dielectric, electrodes, or contaminants from processing contribute to spin decoherence. In the recent decade, valleytronics has seen a revival due to the discovery of valley‐coupled spins in monolayer transition metal dichalcogenides. Such valley‐coupled spins are protected by inversion asymmetry and time reversal symmetry and are promising candidates for robust qubits. In this report, the progress toward building such qubits is presented. Following an introduction to the key attractions in fabricating such qubits, an up‐to‐date brief is provided for the status of each key step, highlighting advancements made and/or outstanding work to be done. This report concludes with a perspective on future development highlighting major remaining milestones toward scalable spin‐valley qubits. Abstract : Building a new type of qubit based on valley‐coupled spins is reported. This report provides an update to the progress of the field, framed in the context of translating the promising science of valley‐protected spins into actual building blocks of a quantum computer.