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Magnetic noise spectrum measurement by an atom laser in gravity
O. Kálmán, Z. Darázs, F. Brennecke +1
Bose-Einstein condensates of ultracold atoms can be used to sense fluctuations of the magnetic field by means of transitions into untrapped hyperfine states. It has been shown rece…
Real-time observation of fluctuations at the driven-dissipative Dicke phase transition
Ferdinand Brennecke, Rafael Mottl, Kristian Baumann +3
We experimentally study the influence of dissipation on the driven Dicke quantum phase transition, realized by coupling external degrees of freedom of a Bose-Einstein condensate to…
The Dicke Quantum Phase Transition with a Superfluid Gas in an Optical Cavity
Kristian Baumann, Christine Guerlin, Ferdinand Brennecke +1
A phase transition describes the sudden change of state in a physical system, such as the transition between a fluid and a solid. Quantum gases provide the opportunity to establish…
Dynamical Coupling between a Bose-Einstein Condensate and a Cavity Optical Lattice
Stephan Ritter, Ferdinand Brennecke, Kristian Baumann +3
A Bose-Einstein condensate is dispersively coupled to a single mode of an ultra-high finesse optical cavity. The system is governed by strong interactions between the atomic motion…
Cavity Opto-Mechanics with a Bose-Einstein Condensate
Ferdinand Brennecke, Stephan Ritter, Tobias Donner +1
Cavity opto-mechanics studies the coupling between a mechanical oscillator and a cavity field, with the aim to shed light on the border between classical and quantum physics. Here…
Cavity QED with a Bose-Einstein condensate
Ferdinand Brennecke, Tobias Donner, Stephan Ritter +3
Cavity quantum electrodynamics (cavity QED) describes the coherent interaction between matter and an electromagnetic field confined within a resonator structure, and is providing a…