Engineering Higgs dynamics by spectral singularities
We generalize the dynamical phase diagram of a Bardeen-Cooper-Schrieffer condensate, considering attractive to repulsive, i.e., critical quenches (CQ) and a non-constant density of states (DOS). We show that different synchronized Higgs dynamical phases can be stabilized, associated with singulariti...
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| Main Authors: | , , |
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| Format: | Article (Journal) Chapter/Article |
| Language: | English |
| Published: |
17 May 2022
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| In: |
Arxiv
Year: 2022, Pages: 1-8 |
| DOI: | 10.48550/arXiv.2205.06826 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.48550/arXiv.2205.06826 Verlag, lizenzpflichtig, Volltext: http://arxiv.org/abs/2205.06826 
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| Author Notes: | H.P. Ojeda Collado, Nicolò Defenu, and José Lorenzana |
| Summary: | We generalize the dynamical phase diagram of a Bardeen-Cooper-Schrieffer condensate, considering attractive to repulsive, i.e., critical quenches (CQ) and a non-constant density of states (DOS). We show that different synchronized Higgs dynamical phases can be stabilized, associated with singularities in the density of states (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. |
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| Item Description: | Version 1 vom 13 Mai 2022, Version 2 vom 17 Mai 2022 Gesehen am 17.10.2022 |
| Physical Description: | Online Resource |
| DOI: | 10.48550/arXiv.2205.06826 |