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Relaxation and Prethermalization in an Isolated Quantum System
Measurements of full quantum mechanical probability distributions of matter-wave interference are used to study the relaxation dynamics of a coherently split one-dimensional Bose gas and obtained comprehensive information about the dynamical states of the system.
Experimental observation of a generalized Gibbs ensemble
It is shown experimentally that a degenerate one-dimensional Bose gas relaxes to a state that can be described by such a generalized ensemble, and this is verified through a detailed study of correlation functions up to 10th order.
Local emergence of thermal correlations in an isolated quantum many-body system
The relaxation mechanisms of isolated quantum many-body systems are insufficiently understood, but a one-dimensional quantum gas experiment uncovers the local emergence of thermal correlations and…
Transient Supersolid Properties in an Array of Dipolar Quantum Droplets
We study theoretically and experimentally the emergence of supersolid properties in a dipolar Bose-Einstein condensate. The theory reveals a ground state phase diagram with three distinct regimes - a…
Experimental characterization of a quantum many-body system via higher-order correlations
This work studies a pair of tunnel-coupled one-dimensional atomic superfluids and characterize the corresponding quantum many-body problem by measuring correlation functions and concludes that in thermal equilibrium this system can be seen as a quantum simulator of the sine-Gordon model, relevant for diverse disciplines ranging from particle physics to condensed matter.
High-resolution scanning electron microscopy of an ultracold quantum gas
Our knowledge of ultracold quantum gases is strongly influenced by our ability to probe these objects. In situ imaging combined with single-atom sensitivity is an especially appealing scenario, as it…
Lifetime of the Bose gas with resonant interactions.
Varying the scattering length a at fixed temperature, the crossover between the finite-temperature unitary region and the previously studied regime where |a| is smaller than the thermal wavelength is investigated.
Roton Excitations in an Oblate Dipolar Quantum Gas.
Observations of radial and angular roton excitations around a droplet crystallization transition in dipolar Bose-Einstein condensates are compared to a theoretically calculated excitation spectrum allowing us to connect the crystallization mechanism with the softening of theangular roton modes.
Dilute dipolar quantum droplets beyond the extended Gross-Pitaevskii equation
Dipolar quantum droplets are exotic quantum objects that are self-bound due to the subtle balance of attraction, repulsion and quantum correlations. Here we present a systematic study of the critical…
Prethermalization revealed by the relaxation dynamics of full distribution functions
We detail the experimental observation of the non-equilibrium many-body phenomenon prethermalization. We study the dynamics of a rapidly and coherently split one-dimensional Bose gas. An analysis…