Topological terms arise naturally in gauge theories but have been difficult to implement in quantum simulators. Now, a tunable topological θ-angle is demonstrated with a cold-atom platform.

The phonon density of states in diamond is engineered using phononic crystals to suppress single-phonon processes that induce decoherence in individual quantum emitters.

Measurements combined with post-processing of their outcomes can be used to prepare ordered quantum states. It has been shown that they can drive a Nishimori phase transition into a disordered state even in the presence of quantum errors.

Quantum fluctuations in frustrated magnets are expected to produce unconventional emergent behaviour. Neutron spectroscopy measurements now provide evidence for emergent gauge fields in a pyrochlore spin ice.

Coupling semiconductor spin qubits over long distances using a superconducting resonator makes different quantum architectures possible. Now, the coherent swapping of quantum states has been observed between qubits coupled using this design.

Measurements of the spin susceptibility in a model cuprate reveal the presence of two distinct gaps underlying the pseudogap behaviour. One gap is attributed to charge density waves and the other to the predicted formation of spin singlets.

From soft matter models to plasma generation, physics offers a wide array of tools to optimize the way we prepare and preserve our food.

Cristina Arimany-Nardi, Isabel Marques de Oliveira and Teresa Sanchis from the Institute for Bioengineering of Catalonia tell Nature Physics about their strategy to promote environmentally friendly practices in research, administration and on the way to work.

90 years after the first production of radioactive isotopes, it’s time for the next phase of discoveries.

When it comes to baking recipes, the quantities of ingredients are one of the pillars of success. Karen Mudryk explores the intricacies of measurements in the kitchen.