Since the achievement of quantum degeneracy in gases of chromium atoms in 2004, the
experimental investigation of ultracold gases made of highly magnetic atoms has …

In this review recent investigations are summarized of many-body quantum systems with
long-range interactions, which are currently realized in Rydberg atom arrays, dipolar …

Supersolid states simultaneously feature properties typically associated with a solid and with
a superfluid. Like a solid, they possess crystalline order, manifesting as a periodic …

By combining theory and experiments, we demonstrate that dipolar quantum gases of both
Er 166 and Dy 164 support a state with supersolid properties, where a spontaneous density …

Dipolar Bose-Einstein condensates represent a powerful platform for the exploration of
quantum many-body phenomena arising from long-range interactions. A series of recent …

The competition of dipole-dipole and contact interactions leads to exciting new physics in
dipolar gases, well illustrated by the recent observation of quantum droplets and rotons in …

Supersolids are states of matter that spontaneously break two continuous symmetries:
translational invariance owing to the appearance of a crystal structure and phase invariance …

Quantum fluctuations can stabilize Bose–Einstein condensates (BEC) against the mean-
field collapse. Stabilization of the condensate has been observed in quantum degenerate …

In a joint experimental and theoretical effort, we report on the formation of a macrodroplet
state in an ultracold bosonic gas of erbium atoms with strong dipolar interactions. By precise …

Quantum fluctuations are the origin of genuine quantum many-body effects, and can be
neglected in classical mean-field phenomena. Here, we report on the observation of stable …