AI Article Synopsis
- The study explores how many-body systems, specifically spin-1 atoms in a shared spatial mode, exhibit diverse behaviors ranging from reversible dynamics to rapid thermalization.
- When analyzed through the Bogoliubov framework, the system shows undamped oscillations due to its linear energy spectrum.
- Conversely, once the system breaks integrability, chaotic dynamics arise, resulting in thermalization, consistent with modern theoretical expectations like the eigenstate thermalization hypothesis.
Article Abstract
The dynamics of a many-body system can take many forms, from a purely reversible evolution to fast thermalization. Here we show experimentally and numerically that an assembly of spin-1 atoms all in the same spatial mode allows one to explore this wide variety of behaviors. When the system can be described by a Bogoliubov analysis, the relevant energy spectrum is linear and leads to undamped oscillations of many-body observables. Outside this regime, the nonlinearity of the spectrum leads to irreversibility, characterized by a universal behavior. When the integrability of the Hamiltonian is broken, a chaotic dynamics emerges and leads to thermalization, in agreement with the eigenstate thermalization hypothesis paradigm.
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