Characterizing the temperature dependence of Fano-Feshbach resonances of Ultracold Polarized Thulium

Abstract

Recent studies demonstrated anomalous temperature shifts for some Fano-Feshbach resonances of thulium atoms. These anomalies were explained by the variation in light intensity in the optical dipole trap, which accompanied changes in temperature. In addition, a temperature-related transformation of the statistics of the interresonance spacing was demonstrated [1]. Here, we analyze the shifts of isolated s- and d-type Fano-Feshbach resonances of ultracold thulium atoms with temperature for a fixed depth of an optical dipole trap. The measurements are consistent with the 3-body recombination-based theory of the temperature-related resonance shift and enable the extraction of the resonance parameters, particularly the magnetic moments of closed channel states. This parameter and the known polarizability of the open channel enable us to separate the contributions of the temperature and Stark shift to the overall shift of the resonances and show the dominant role of the Stark effect in the overall shift.

References in corpus (10)

• Bose-Einstein Condensation of Erbium
• Strong dipolar effects in a quantum ferrofluid
• Observation of dipole-dipole interaction in a degenerate quantum gas
• Quantum degenerate dipolar Fermi gas
• Long-lived and transient supersolid behaviors in dipolar quantum gases
• d-wave collapse and explosion of a dipolar Bose-Einstein condensate
• Radial and angular rotons in trapped dipolar gases
• Controlling a magnetic Feshbach resonance with laser light
• Ground-state structure and stability of dipolar condensates in anisotropic traps
• Controlling interactions between highly-magnetic atoms with Feshbach resonances

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• Loss features in ultracold ${}^{162}$Dy gases: two- versus three-body processes
• Bose-Einstein condensate as a diagnostic tool for an optical lattice formed by 1064 nm laser light
• Inspiration from machine learning on example of optimization of the Bose-Einstein condensate of thulium atoms in a 1064-nm trap
• Transport of magnetically sensitive atoms in a magnetic environment
• Factor of 1000 suppression of the depolarization rate in ultracold thulium collisions