2021/02/24 by Mykyta Onizhuk, Giulia Galli
Materials Science · Physics and Astronomy · #2D Materials and Applications #Chemical and Physical Properties of Materials #Coherence (philosophical gambling strategy) #Quantum #Quantum and electron transport phenomena #Quantum computer #Quantum decoherence #Qubit #Spin (aerodynamics) #Spin engineering #cond-mat.mtrl-sci #quant-ph #van der Waals force
paper · pdf · doi:10.1063/5.0048399
published as Appl. Phys. Lett. 118, 154003 (2021) · 6 pages, 4 figures
arxiv created 2021/02/24 · openalex created_date 2021/03/01 · openalex publication_date 2021/04/12 · arxiv updated 2021/04/16 · openalex updated_date 2026/08/05
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 MoS2 and WS2, 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.