Research

Cooling technologies employing laser light and evaporation make it possible to cool gases to temperatures extremely close to absolute zero. These systems can be used for a variety of purposes, including fundamental tests of physics, simulating problems from solid state physics, which are difficult to handle mathematically, and for building better clocks. In these systems interesting many-body quantum phenomena can be studies, such as a Bose-Einstein condensate, superconductivity, a Mott insulator, and a Tonks-Girardeau gas.

Bose-Einstein Condensation (BEC)

Cooling technologies employing laser light and evaporation make it possible to cool gases to temperatures extremely close to absolute zero. These systems can be used for a variety of purposes, including fundamental tests of physics, simulating problems from solid state physics, which are difficult to handle mathematically, and for building better clocks. In these systems interesting many-body quantum phenomena can be studies, such as a Bose-Einstein condensate, superconductivity, a Mott insulator, and a Tonks-Girardeau gas. [more]
A single atom coupled to a single mode of light - this archetype of matter-light interaction is investigated here. The boundary conditions imposed by high-quality mirrors lead to a strong coupling between atom and light, yielding a rich system in which single atoms are detected in real time, new light forces appear and the quantum aspects of the radiation come strikingly into play.

Cavity Quantum Electrodynamics (QED)

A single atom coupled to a single mode of light - this archetype of matter-light interaction is investigated here. The boundary conditions imposed by high-quality mirrors lead to a strong coupling between atom and light, yielding a rich system in which single atoms are detected in real time, new light forces appear and the quantum aspects of the radiation come strikingly into play. [more]
Neutral atoms coupled to high-finesse optical cavities provide unique systems to study interactions of light and matter in the quantum regime. State of the art experiments allow full control over an atom residing inside a cavity and all optical fields the atom is exposed to. With these tools for quantum engineering at hand, atom-cavity systems are naturally at the heart of intriguing concepts for quantum computing and quantum communication. Our goal is to realize prototypes of quantum interfaces between ultracold atoms and light, using a coupling mechanism that is based on Cavity Quantum Electrodynamics.

Quantum Information Processing

Neutral atoms coupled to high-finesse optical cavities provide unique systems to study interactions of light and matter in the quantum regime. State of the art experiments allow full control over an atom residing inside a cavity and all optical fields the atom is exposed to. With these tools for quantum engineering at hand, atom-cavity systems are naturally at the heart of intriguing concepts for quantum computing and quantum communication. Our goal is to realize prototypes of quantum interfaces between ultracold atoms and light, using a coupling mechanism that is based on Cavity Quantum Electrodynamics. [more]
Cooling the motion, rotation and vibration of molecules offers great potential for improving precision measurements. It also allows for the investigation of chemistry and collisions at low temperatures. As laser cooling does not work for molecules due to the lack of closed transitions, we develop new methods to cool, trap and study polar molecules like water or ammonia.

Cold Polar Molecules

Cooling the motion, rotation and vibration of molecules offers great potential for improving precision measurements. It also allows for the investigation of chemistry and collisions at low temperatures. As laser cooling does not work for molecules due to the lack of closed transitions, we develop new methods to cool, trap and study polar molecules like water or ammonia. [more]
 
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