Solid-state spin coherence time approaching the physical limit.

ABSTRACT: Extending the coherence time of quantum systems to their physical limit is a long-standing pursuit and critical for developing quantum science and technology. By characterizing all the microscopic noise sources of the electronic spin [nitrogen-vacancy (NV) center] in diamonds using complete noise spectroscopy, we observe a previously unforeseen noise spectrum manifested as the empirical limit ([Formula: see text]) that has puzzled researchers for decades in various solid-state systems. By implementing a corresponding dynamical decoupling strategy, we are able to surpass the empirical limit and approach the upper physical limit T₂ = 2T₁ for NVs, from room temperature down to 220 kelvin. Our observations, including the independence across different spatial

SUBMITTER: Han S 

PROVIDER: S-EPMC11870053 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature