Conventional superconductivity emerges from pairing of charge carriers – electrons or holes – mediated by phonons. In many unconventional superconductors, the pairing mechanism is conjectured to be mediated by magnetic correlations, as captured by models of mobile charges in doped antiferromagnets. more

Collisional complexes, which are formed as intermediate states in molecular collisions, are typically short-lived and decay within picoseconds. However, in ultracold collisions involving bialkali molecules more

With a wonderful buffet of homemade savory and sweet dishes from all over the world,
our division celebrated its annual Christmas party on December 15, 2022. more

Hendrik von Raven successfully defended his doctoral thesis on "A new Caesium quantum gas microscope with precise magnetic field control” on September 27th, 2022. more

Immanuel is one of 20 scientists to be named this year's Clarivate Citation Laureate, being one of four recipients in the physics category to receive the award for his "ground-breaking research on quantum many-body systems using ultracold atomic and molecular gases, opening the way to quantum simulations of 'artificial solids'". more

Ultracold polar molecules offer strong electric dipole moments and rich internal structure, which makes them ideal building blocks to explore exotic quantum matter, implement novel quantum information schemes more

We demonstrate a cavity-based solution to scale up experiments with ultracold atoms in optical lattices by an order of magnitude over state-of-the-art free-space lattices. Our two-dimensional (2D) optical lattices are created by power-enhancement cavities with large mode waists of 489(8)μm and allow us to trap ultracold strontium atoms at a lattice depth of 60μK by using only 80mW of input light per cavity axis. We characterize these lattices using high-resolution clock spectroscopy and resolve carrier transitions between different vibrational levels. more