Engineering Higgs dynamics by spectral singularities
Year: 2023
Authors: Collado H.P.O., Defenu N., Lorenzana J.
Autors Affiliation: Sapienza Univ Rome, ISC CNR, Piazzale Aldo Moro 2, I-00185 Rome, Italy; Sapienza Univ Rome, Dept Phys, Piazzale Aldo Moro 2, I-00185 Rome, Italy; Swiss Fed Inst Technol, Inst Theoret Phys, CH-8093 Zurich, Switzerland.
Abstract: We generalize the dynamical phase diagram of a Bardeen-Cooper-Schrieffer condensate, considering attractive to repulsive, i.e., critical quenches (CQs) and a nonconstant density of states (DOS). We show that different synchronized Higgs dynamical phases can be stabilized, associated with singularities in the DOS and different quench protocols. In particular, the CQ can stabilize an overlooked high-frequency Higgs dynamical phase related to the upper edge of the fermionic band. For a compensated Dirac system we find a Dirac-Higgs mode associated with the cusp singularity at the Fermi level, and we show that synchronized phases become more pervasive across the phase diagram. The relevance of these remarkable phenomena and their realization in ensembles of fermionic cold atoms confined in optical lattices is also discussed.
Journal/Review: PHYSICAL REVIEW RESEARCH
Volume: 5 (2) Pages from: 23011-1 to: 23011-11
More Information: We thank C. Balseiro, G. Usaj, G. Seibold, L. Benfatto, C. Castellani, J. Sofo, and M. Papinutto for useful discussions. We acknowledge financial support from the Italian Ministry for University and Research through PRIN Projects No. 2017Z8TS5B and No. 20207ZXT4Z. H.P.O.C. is supported by the Marie Sklodowska-Curie individual fellowship grant agreement, SUPERDYN No. 893743. This work is supported by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany’s Excellence Strategy EXC2181/1-390900948 (the Heidelberg STRUC-TURES Excellence Cluster) .KeyWords: Raman-scattering; Phase-transition; Mode; Excitations; Particles; GapDOI: 10.1103/PhysRevResearch.5.023011ImpactFactor: 3.500Citations: 4data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-11-24References taken from IsiWeb of Knowledge: (subscribers only)
