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Direct control of high magnetic fields for cold atom experiments based on NV centers

In ultracold quantum gases, the interactions between the individual atoms can be controlled by applying magnetic bias fields. As magnetic field fluctuations limit the precision here, typically a feedback loop needs to be employed to regulate the …

High signal to noise absorption imaging of alkali atoms at moderate magnetic fields

We present an improved scheme for absorption imaging of alkali atoms at moderate magnetic fields, where the excited state is well in the Paschen-Back regime but the ground state hyperfine manifold is not. It utilizes four atomic levels to obtain an …

Pulsed production of antihydrogen

Antihydrogen atoms with K or sub-K temperature are a powerful tool to precisely probe the validity of fundamental physics laws and the design of highly sensitive experiments needs antihydrogen with controllable and well defined conditions. We present …

Glassy Dynamics in a Disordered Heisenberg Quantum Spin System

Vortex motion quantifies strong dissipation in a holographic superfluid

Collisions of Three-Component Vector Solitons in Bose-Einstein Condensates

Ultracold gases provide an unprecedented level of control for the investigation of soliton dynamics and collisions. We present a scheme for deterministically preparing pairs of three-component solitons in a Bose-Einstein condensate. Our method is …

From the Jaynes–Cummings model to non-abelian gauge theories: a guided tour for the quantum engineer

The design of quantum many body systems, which have to fulfill an extensive number of constraints, appears as a formidable challenge within the field of quantum simulation. Lattice gauge theories are a particular important class of quantum systems …

Neural-network quantum state tomography in a two-qubit experiment

Experimental extraction of the quantum effective action for a non-equilibrium many-body system

On the fundamental level, quantum fluctuations or entanglement lead to complex dynamical behaviour in many-body systems for which a description as emergent phenomena can be found within the framework of quantum field theory. A central quantity in …

Classical and quantum chaos in a three-mode bosonic system