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Updated: Sep 23, 2025

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
Published on: March 30, 2017
Quasiparticle dynamics by effective [Formula: see text]-field distortion
Tiago de Sousa Araújo Cassiano1, Pedro Henrique de Oliveira Neto1, Geraldo Magela E Silva1
1Institute of Pysics, University of Braília, Brasília, Brazil.
Abstract:
Modeling dynamical processes of quasiparticles in low dimensional [Formula: see text]-conjugated systems is challenging due to electron-phonon coupling. We show that this interaction leads to linear potential energy terms in the lattice Lagrangian similar to a local "gravitational" field. The presence of quasiparticles deforms this field in a way analogous to a low-dimension solution of general relativity. Our calculations with analytical expressions for effective [Formula: see text]-fields yield the correct band structure and deliver proper time evolution of the quasiparticle's properties. Furthermore, we report a sharp reduction in the dynamics computational time up to two orders of magnitude, a result that has major simulation implications.
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