Realizing distance-selective interactions in a Rydberg-dressed atom array

Exciting ultracold atoms into highly-excited Rydberg states extends the cold atom toolbox by long-range interactions. Rydberg macrodimers - electrostatically bound Rydberg atom pairs - provide bond lengths as large as the distances between different lattice sites in an optical lattice. Optical excitation rates of macrodimers are enhanced if the distance and orientation of the prepared ground state atom pairs match the motional state of the macrodimer state and are suppressed otherwise. more

Till successfully defended his PhD thesis !

Till sucessfully defended his doctoral thesis on "Construction of a Caesium Quantum Gas Microscope". more

Benchmarking a Novel Efficient Numerical Method for Localized 1D Fermi-Hubbard Systems on a Quantum Simulator

Due to a combination of computational complexity and physical pertinence, quantum many-body physics constitutes one of the most exciting applications of NISQ era quantum computers and neutral atom quantum simulators. more

Microscopic evolution of doped Mott insulators from polaronic metal to Fermi liquid

The competition between antiferromagnetism and hole motion in two-dimensional Mott insulators lies at the heart of a doping-dependent transition from an anomalous metal to a conventional Fermi liquid. more

"It’s great to see the passion, the verve, with which the work is done here“

German Chancellor Angela Merkel and Bavarian Prime Minister Markus Söder visited the MPQ and got a lab tour at our Rubidium Quantum Gas Microscope experiment. more

Observing non-ergodicity due to kinetic constraints in tilted Fermi-Hubbard chains

It has been predicted that even in the absence of disorder many-body systems may fail to thermalize.
In this work we observe non-ergodic dynamics in the 1D tilted Fermi-Hubbard model that is distinct from previously studied regimes,
and propose a microscopic mechanism that is due to emergent kinetic constraints. more

Collisions of ultracold molecules in bright and dark optical dipole traps

What happens when two molecules collide with each other? This seemingly simple question remains unanswered in many cases. Specifically, when two molecules collide in such a way that chemical reactions are impossible due to energy and momentum conservation, one would expect that the molecules remain unchanged. more

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