Quantum Noise Spectroscopy of Dynamical Critical Phenomena

TitleQuantum Noise Spectroscopy of Dynamical Critical Phenomena
Publication TypeJournal Article
Year of Publication2022
AuthorsMachado, F, Demler, EA, Yao, NY, Chatterjee, S
Date Published11/2022
KeywordsCondensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Strongly Correlated Electrons, Quantum Physics

The transition between distinct phases of matter is characterized by the nature of fluctuations near the critical point. We demonstrate that noise spectroscopy can not only diagnose the presence of a phase transition, but can also determine fundamental properties of its criticality. In particular, by analyzing a scaling collapse of the decoherence profile, one can directly extract the critical exponents of the transition and identify its universality class. Our approach naturally captures the presence of conservation laws and distinguishes between classical and quantum phase transitions. In the context of quantum magnetism, our proposal complements existing techniques and provides a novel toolset optimized for interrogating two-dimensional magnetic materials.

Biblio Affiliation: