Linear Response of a Periodically Driven Thermal Dipolar Gas

Abstract

We study the nonequilibrium dynamics of an ultracold, non-degenerate dipolar gas of ${}^{164}$Dy atoms in a cylindrically symmetric harmonic trap. To do so, we investigate the normal modes and linear response of the gas when driven by means of periodic modulations to the trap axial-frequency. We find that the resonant response of the gas depends strongly on the dipole alignment axis, owing to anisotropies in the differential cross section of the atoms. We employ the use of the method of averages as well as numerical Monte Carlo methods for our analysis. A striking result is that certain normal modes, termed "melting modes", initiated in an anisotropic out-of-equilibrium configuration, relax to equilibrium without oscillating.

arXiv comment14 pages, 11 figures

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Cited by in corpus (7)

• Tuning of dipolar interactions and evaporative cooling in a three-dimensional molecular quantum gas
• Observation of generalized t-J spin dynamics with tunable dipolar interactions
• Accurate determination of the scattering length of erbium atoms
• Anisotropic thermalization of dilute dipolar gases
• Thermoviscous Hydrodynamics in Non-Degenerate Dipolar Bose Gases
• Thermal Conductivity of an Ultracold Paramagnetic Bose Gas
• Anisotropic acoustics in dipolar Fermi gases