Submission Date

5-7-2025

Document Type

Paper

Department

Physics & Astronomy

Adviser

Thomas Carroll

Committee Member

Thomas Carroll

Committee Member

Ross Martin-Wells

Department Chair

Casey Schwarz

External Reviewer

Michael Noel

Distinguished Honors

This paper has met the requirements for Distinguished Honors.

Project Description

An isolated system of ultracold Rydberg atoms can come to equilibrium by exchanging energy through dipole-dipole interactions. In our experiment, a static electric field of a few V/cm shifts the energy levels of the atoms, so that the energy levels are nearly degenerate at zero field and fan out with increasing field to form a manifold. We excite atoms to energy levels near the center of the manifold, where the spacing is nearly harmonic. We allow them to interact for a few microseconds, by which time the population of each energy level has reached a steady state. The population is then measured at various densities and compared to simulation results. We use the notion of dynamical typicality to predict the equilibrium configuration and show that the system fails to thermalize.

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