Wave turbulence in driven dipolar gases across the superfluid to supersolid transition
ORAL
Abstract
Turbulence in a physical system involves the transport of energy among different length
scales. Ultracold gases provide fertile platforms to explore this phenomenon, due to the
involvement of a wide range of length scales ranging from short ones e.g. the healing
length determined by the s-wave interactions to macroscopic scales set by external traps.
Gases with long-range interactions, such as magnetic dipoles, may further aid in
unveiling the universal characteristics of quantum turbulence due to the existence of
competing interactions. We unravel the emergent energy cascade in quasi-two-
dimensional dipolar gases within the extended Gross-Pitaevskii framework. To initiate
such a cascade, the system is periodically driven across the superfluid to supersolid
transition and vice versa. A power-law decay is observed in the long-wavelength limit of
the energy density spectrum and the momentum distribution. The exponent of such a
decay is investigated for different initial states and characteristics of the driving
protocol, revealing signatures of wave quantum turbulence.
scales. Ultracold gases provide fertile platforms to explore this phenomenon, due to the
involvement of a wide range of length scales ranging from short ones e.g. the healing
length determined by the s-wave interactions to macroscopic scales set by external traps.
Gases with long-range interactions, such as magnetic dipoles, may further aid in
unveiling the universal characteristics of quantum turbulence due to the existence of
competing interactions. We unravel the emergent energy cascade in quasi-two-
dimensional dipolar gases within the extended Gross-Pitaevskii framework. To initiate
such a cascade, the system is periodically driven across the superfluid to supersolid
transition and vice versa. A power-law decay is observed in the long-wavelength limit of
the energy density spectrum and the momentum distribution. The exponent of such a
decay is investigated for different initial states and characteristics of the driving
protocol, revealing signatures of wave quantum turbulence.
–
Presenters
-
George Bougas
Missouri University of Science and Technology, University of Hamburg
Authors
-
George Bougas
Missouri University of Science and Technology, University of Hamburg
-
Koushik Mukherjee
Division of Mathematical Physics, Lund University
-
Simeon I Mistakidis
Missouri University of Science and Technology, Department of Physics, Missouri University of Science and Technology, Rolla, ITAMP, Harvard University, Missouri university of science and technology