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Studies of Bloch oscillations in many-body systems remain limited due to their interaction-induced damping. Now, such oscillations have been observed in a solitonic wave packet of atoms in a Bose gas at the mesoscopic scale.

A large-scale atom-array architecture enables coherent continuous operation of more than 3,000 physical qubits, where new qubits can be introduced without destroying existing quantum information encoded in the system.

Magnetostirring is used to rotate the magnetic field and set a dipolar supersolid composed of ultracold atoms spinning, revealing fundamental differences in vortex seeding dynamics between modulated and unmodulated quantum fluids.

Order parameter and phase characterization of multicomponent quantum system is of fundamental importance. Here the authors show the parameter control of the dynamics and relaxation of the magnetic ordering of the spin-1 Bose-Einstein condensates of sodium atoms in uniform magnetic field.

A potentially general mechanism for symmetry breaking in mesoscopic quantum systems is revealed in a theoretical study, which shows how, in a rotating Bose–Einstein condensate, the symmetry properties of the true many-body state are related to those of its mean-field approximation.

Two-dimensional Bose fluids—such as liquid-helium films, or confined ultracold atoms—cannot form a condensate, but become superfluid instead. Frictionless flow, proving superfluid behaviour, has now been observed in an ultracold two-dimensional Bose gas that is stirred with a laser beam.

Here the authors use Ramsey interferometry to study Tan’s contact in uniform two-dimensional Bose gas of 87Rb atoms across the Berezinskii–Kosterlitz–Thouless superfluid transition. They find that the two-body contact is continuous across the critical point.

Chern numbers characterize the quantum Hall effect conductance—non-zero values are associated with topological phases. Previously only spotted in electronic systems, they have now been measured in ultracold atoms subject to artificial gauge fields.

In principle, it is possible to simulate some astrophysical phenomena inside the highly controlled environment of an atomic physics laboratory: previous work on the thermodynamics of a two-component Fermi gas (a system suited for such studies) led to thermodynamic quantities averaged over the trap. Now a general experimental method is reported that yields the equation of state of a uniform gas, providing new physical insights and enabling a detailed comparison with existing theories.

The gradual development of a turbulent cascade in a weakly interacting homogeneous Bose gas is observed on application of a periodic driving force.