Ultracold spinor gases of Rb
Far from equilibrium, comparatively little is known about the possibilities nature reserves for the structure and states of quantum many-body systems. A potential scenario is that these systems can approach a non-thermal fixed point and show …
To access the dynamics and internal degrees of freedom in a spin-1 system we present experimental implementation schemes for initial conditions and read-out methods to access the spin projections. For probing non-equilibrium dynamics in spatially …
In this thesis we study long-time spin dynamics in the F = 1 hyperfine manifold of a 87Rb Bose-Einstein condensate (BEC). The magnetic sub-levels constitute a spin-1 system with ferromagnetic interactions. We initialize the system out of equilibrium …
We experimentally study a nonlinear detection scheme in which entangling interactions are time reversed. In this way, nonclassical many-particle states are disentangled in order to enable their feasible readout. In the context of quantum-enhanced …
In this thesis, we study the structure formation following a quench of the detuning of spin exchange. For this, we employ an effective spin-1 87Rb Bose-Einstein condensate in a one-dimensional situation. Bogoliubov theory predicts unstable momentum …
In this thesis, we study a novel method to extract the Fisher information of quantum states from direct measurements without the need for state reconstruction. Our method characterizes the distinguishability of experimental probability distributions …
The observation of many quantum effects in a spinor Bose gas rely on the possibility for detection at the single-atom level. In a dedicated setup in our group it has been shown that fluorescence imaging is capable of achieving single-atom resolution …