Substrate-controlled dynamics of spin qubits in low dimensional van-der-Waals materials

Abstract

We report a theoretical study of the coherence dynamics of spin qubits in two-dimensional materials (2DMs) and van-der-Waals heterostructures, as a function of the host thickness and the composition of the surrounding environment. We focus on MoS${}_2$ and WS${}_2$, two promising systems for quantum technology applications, and we consider the decoherence arising from the interaction of the spin qubit with nuclear spins. We show that the Hahn-echo coherence time is determined by a complex interplay between the source of decoherence in the qubit host and in the environment, which in turn determines whether the noise evolution is in a classical or quantum mechanical regime. We suggest that the composition and thickness of van-der-Waals heterostructures encapsulating a qubit host can be engineered to maximize coherence times. Finally, we discuss how quantum sensors may be able to probe the dynamics of the nuclear bath in 2DMs.

arXiv comment6 pages, 4 figures

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Cited by in corpus (6)

• Dielectrics for Two-Dimensional Transition Metal Dichalcogenide Applications
• Spin coherence times of point defects in two-dimensional materials from first principles
• Decoherence of Nuclear Spins in the Proximity of Nitrogen Vacancy Centers in Diamond
• First-principles computational methods for quantum defects in two-dimensional materials: A perspective
• Strategies to search for two-dimensional materials with long spin qubit coherence time
• Probing aqueous interfaces with spin defects