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Study of out-of-equilibrium systems: turbulence generation and non-thermal fixed points detection

Grant number: 22/00697-0
Support Opportunities:Scholarships in Brazil - Post-Doctoral
Start date: May 01, 2022
End date: October 31, 2024
Field of knowledge:Physical Sciences and Mathematics - Physics - Atomic and Molecular Physics
Principal Investigator:Vanderlei Salvador Bagnato
Grantee:Amilson Rogelso Fritsch
Host Institution: Instituto de Física de São Carlos (IFSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
Associated research grant:13/07276-1 - CEPOF - Optics and Photonic Research Center, AP.CEPID

Abstract

Bose-Einstein condesates are used in the development of different research fields, including turbulence in quantum gases, which is our main area. Understanding turbulence in a fluid in which all parameters can be controlled in a laboratory can help us to understand turbulence in other fluids present in our daily lives. We know that an external excitation can be used to drive a condensate out of equilibrium. Understand the mechamisms that can induce the turbulent state is the main focus of our project. In the researches that this group has been developing, the condensate is trapped in a pure magnetic trap, and the external excitation is performed throught an oscillatory magnetic field. This magnetic field not only acts on the atoms, but it also changes the trapping potential. Here we propose an alternative way to trap the atoms by using a spherical optical trap, to decouple the external excitation from the trapping potential. This can provide us a new way to understand the fundaments that contribute to the generation of a turbulent state. (AU)

News published in Agência FAPESP Newsletter about the scholarship:
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Scientific publications
(The scientific publications listed on this page originate from the Web of Science or SciELO databases. Their authors have cited FAPESP grant or fellowship project numbers awarded to Principal Investigators or Fellowship Recipients, whether or not they are among the authors. This information is collected automatically and retrieved directly from those bibliometric databases.)
VIVANCO, FRANKLIN J.; FRITSCH, AMILSON R.; GARCIA-OROZCO, ARNOL D.; MORENO-ARMIJOS, MICHELLE A.; TELLES, GUSTAVO D.; TAVARES, PEDRO E. S.; BAGNATO, VANDERLEI S.. Energy cascade in a far-from-equilibrium inhomogeneous trapped Bose gas obtained by power spectrum analysis. European Physical Journal-Special Topics, v. N/A, p. 4-pg., . (22/00697-0, 13/07276-1, 14/50857-8)
MADEIRA, LUCAS; GARCIA-OROZCO, ARNOLD.; MORENO-ARMIJOS, MICHELLE A.; FRITSCH, AMILSON R.; BAGNATO, VANDERLEI S.. Universal scaling in far-from-equilibrium quantum systems: An equivalent differential approach. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, v. 121, n. 30, p. 8-pg., . (22/00697-0, 14/50857-8, 23/04451-9, 13/07276-1)
MORENO-ARMIJOS, M. A.; FRITSCH, A. R.; GARCIA-OROZCO, A. D.; SAB, S.; TELLES, G.; ZHU, Y.; MADEIRA, L.; NAZARENKO, S.; YUKALOV, V. I.; BAGNATO, V. S.. Observation of Relaxation Stages in a Nonequilibrium Closed Quantum System: Decaying Turbulence in a Trapped Superfluid. Physical Review Letters, v. 134, n. 2, p. 6-pg., . (22/00697-0, 14/50857-8, 23/04451-9, 13/07276-1)