Thermalization near integrability in a dipolar quantum Newton's cradle

Understand

Isolated quantum many-body systems with integrable dynamics generically do not thermalize when taken far from equilibrium.

• As one perturbs such systems away from the integrable point, thermalization sets in, but the nature of the crossover from integrable to thermalizing behavior is an unresolved and actively discussed question.
• We explore this question by studying the dynamics of the momentum distribution function in a dipolar quantum Newton's cradle consisting of highly magnetic dysprosium atoms.
• This is accomplished by creating the first one-dimensional Bose gas with strong magnetic dipole-dipole interactions.