Video URL

https://pirsa.org/23120040

Quantum scars in quantum field theory

Wei, A. (2023). Quantum scars in quantum field theory. Perimeter Institute for Theoretical Physics. https://pirsa.org/23120040

Wei, Annie. Quantum scars in quantum field theory. Perimeter Institute for Theoretical Physics, Dec. 04, 2023, https://pirsa.org/23120040 

          @misc{ scivideos_PIRSA:23120040,
            doi = {10.48660/23120040},
            url = {https://pirsa.org/23120040},
            author = {Wei, Annie},
            keywords = {Quantum Information},
            language = {en},
            title = {Quantum scars in quantum field theory},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2023},
            month = {dec},
            note = {PIRSA:23120040 see, \url{https://scivideos.org/pirsa/23120040}}
          }

Annie Wei Massachusetts Institute of Technology

DOI 10.48660/23120040
Source Repository PIRSA
Collection
Talk Type Scientific Series
Subject

Abstract

We develop the theory of quantum scars for quantum fields. By generalizing the formalisms of Heller and Bogomolny from few-body quantum mechanics to quantum fields, we find that unstable periodic classical solutions of the field equations imprint themselves in a precise manner on bands of energy eigenfunctions. This indicates a breakdown of thermalization at certain energy scales, in a manner that can be characterized via semiclassics. As an explicit example, we consider time-periodic non-topological solitons in complex scalar field theories. We find that an unstable variant of Q-balls, called Q-clouds, induce quantum scars. Some technical contributions of our work include methods for characterizing moduli spaces of periodic orbits in field theories, which are essential for formulating our quantum scar formula. We further discuss potential connections with quantum many-body scars in Rydberg atom arrays. Based on work in arXiv:2212.01637 with Jordan Cotler.

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