Spin-Orbit Coupling Fluctuations as a Mechanism of Spin Decoherence

Abstract

We discuss a general framework to address spin decoherence resulting from fluctuations in a spin Hamiltonian. We performed a systematic study on spin decoherence in the compound K${}_6$[V${}_{15}$As${}_6$O${}_{42}$(D${}_2$O)] $\cdot$ 8D${}_2$O, using high-field Electron Spin Resonance (ESR). By analyzing the anisotropy of resonance linewidths as a function of orientation, temperature and field, we find that the spin-orbit term is a major decoherence source. The demonstrated mechanism can alter the lifetime of any spin qubit and we discuss how to mitigate it by sample design and field orientation.

submitted

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Cited by in corpus (2)

• Electron Spin Resonance of Defects in Spin Chains. o-(DMTTF)2X : a versatile system behaving like molecular magnet
• Independent and coherent transitions between antiferromagnetic states of few-molecule systems