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Conférence - Assa Auerbach : Correlations and Transport in Strongly Interacting Phases of Condensed Matter : The Higgs Mode and Quantum Criticality in Condensed Matter
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Antoine Georges
Physique de la matière condensée
Année 2022-2023
Conférence - Assa Auerbach : Correlations and Transport in Strongly Interacting Phases of Condensed Matter
Assa Auerbach, Department of Physics, Technion, Israel Institute of Technology
The Higgs Mode and Quantum Criticality in Condensed Matter
The two dimensional O(N) relativistic field theory applied to bosonic condensed matter systems, predicts a massive amplitude mode which is paradigm of the high energy Higgs particle in electroweak theory. The condensed matter Higgs mode is a critical mode, which softens tuned toward a quantum critical transition. We have shown by that it is still visible as a threshold of optical conductivity, and in scalar dynamical susceptibilities, even when coupled to lower energy Goldstone modes.
I review experimental detection of critical Higgs modes in cold atoms on an optical lattice, at the superconducting to insulator transition in granular films, and as a "non-classical" optical mode in solid helium.
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