The controlof polaritons are at the heart of nano-photonics and opto-electronics. Two-dimensional materials have emerged as a toolbox for in-situ control of awide range of polaritons: plasmons, excitons and phonons. [mehr]

Ultracold quantum gases are usually well isolated from the environment. This allows for the study of ground state properties and unitary dynamics of many-body quantum systems under almost ideal conditions. [mehr]

The field of thermodynamics is one of the crown jewels of classical physics. However, only comparatively recently, due to the advent of experiments in cold atomic systems with long coherence times, has our detailed understanding of its connection to quantum statistical mechanics seen remarkable progress. [mehr]

Trapped atomic ions are a well-advanced physical system for quantum information science (QIS). QIS is meant to encompass the quest for a specialized, or even universal processor for quantum information, the investigation of fundamental questions of quantum physics, as well as applications of techniques emanating from these investigations to other fields, for example, precision spectroscopy and sensing. [mehr]

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I plan to start this presentation with an overview of our work over the past decade on the efficient coupling of light and single quantum emitters, leading to the single-photon communication of two individual molecules at long distances [1]. [mehr]

One of the great mysteries of modern physics is the identity of nearly 95% of our Universe, which has been labelled as dark matter and dark energy. The high precision of atom interferometry gives a new way to explore this mystery. [mehr]

Microoptics has a plethora of applications, ranging from miniature endoscopes in hospitals to beam shaping or imaging. 3D printing with a femtosecond laser and two-photon polymerization allows for manufacturing optical elements directly after their design with an optical CAD program on a computer, with a resolution better than 100 nm and a high accuracy and reproducibility. [mehr]

Controlling the interaction of light and matter is the basis for diverse applications ranging from light technology to quantum information processing. Nowadays, many of these applications are based on nanophotonic structures. [mehr]

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Molecular systems that can be remotely controlled by light are gaining increasing importance in bio-sciences. High spatial and temporal precision is achievable with short laser pulses and in principle there are three approaches for light regulation. [mehr]

Recent remarkable experimental progress in ‘circuit QED’ now allows realization of extremely strong dispersive coupling between superconducting qubits and microwave photons in resonators. [mehr]