Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain
the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in
Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles
and JavaScript.
BoseâEinstein condensates are a state of matter in which all the constituent particles exist in their lowest energy level. The Pauli Exclusion Principle prevents more than one electron (an example of a fermion) per quantum state; however no such limit is imposed on particles known as bosons, such as helium-4 atoms.
The authors demonstrate a novel regime of coherent harmonic modulation yielding resonances (termed acceleration beats) with energy spacing and temporal correlations controlled by the modulation amplitude. These features are associated with accelerated energy-change rates during the harmonic cycle.
A cascadable all-optical NOT gate is a requirement for full-logic in optical computing. By introducing the concept of non-ground-state polariton amplification in organic semiconductor microcavities, the authors realized the operation of an all-optical cascadable universal gate.
Understanding quantum topological states and the nature of their topological protection is an important fundamental question. By reinterpreting a past mode-switching experiment of an exciton-polariton condensate in a lattice, this work highlights the key role of collective many-body effects leading to the topological phase unwinding.
Previous studies of exciton condensates in moire heterostructures have been limited to large layer separation or one carrier type. Here the authors report a complete sequence of exciton condensates at both electron and hole fillings in large-angle twisted double bilayer graphene without a spacer layer.
The authors show that dipolar condensates are prevalent in bosonic systems due to a self-proximity effect. Furthermore, they propose a new type of Josephson effect called dipolar Josephson effect, where a supercurrent of dipoles happens in the absence of particle flow.
A superfluid is a macroscopic system with zero viscosity through which entropy is reversibly transported by waves. An unexpected transport phenomenon has now been observed between two superfluids, where irreversible entropy transport is enhanced by superfluidity.
Quantum simulators can provide new insights into the complicated dynamics of quantum many-body systems far from equilibrium. A recent experiment reveals that underlying symmetries dictate the nature of universal scaling dynamics.
The observation of quantized vortices in a rotating gas of magnetic atoms confirms a long-standing prediction and has far-reaching implications for the study of phenomena related to superfluidity.
