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Data obtained from the MicroBooNE liquid-argon time projection chamber are used to exclude the single light sterile neutrino interpretation of the LSND and MiniBooNE anomalies at the 95% confidence level.

The scaling dimension of fractional quantum Hall anyons shows agreement with expectations following examination of thermal-to-shot-noise crossover measurements by fitting to the predicted finite-temperature expression involving both the scaling dimension of quasiparticles and their charge.

This Consensus Statement presents the standards for technical reporting in environmental and host-associated microbiome studies (STREAMS) guidelines.

Recently, anyonic statistics were observed in collision experiments on fractional quantum Hall states. Here the authors report signatures of anyonic statistics in the integer quantum Hall state with two copropagating channels, where electrons are split into fractional charges by inter-channel interaction.

Isotopic analyses of stardust have yet to single out a specific stellar origin for it. A revision of the proton-capture rate of ¹⁷O has helped to identify intermediate mass stars (4–8 solar masses) as the source of a large fraction of meteoritic stardust.

Gapless edge-state excitations known as one-dimensional chiral fermions explain many experimental observations of the behaviour of integer quantum Hall systems. But prevailing theory suggests the emergence of extra edge states as well. A new spectroscopic technique for probing the flow of energy in the edge channels of a quantum Hall device finds no loss of energy to such extra states.

Quantum Hall phases have chiral edge modes, which could be used to explore and exploit the quantum properties of electrons. Interactions in these edge states lead to relaxation and decoherence, hindering any realistic exploitation. Here the authors observe spectroscopically the decay and revival of the excitation created by injection of an electron into the edge mode. Their results confirm phase-coherent transport and quantify the effect of dissipation-induced decoherence.

Quantum tomography of individual electrons, which in principle yields complete knowledge of their quantum states, is demonstrated by initially preparing them in a well-controlled quantum state called a leviton.

Non-Hermitian systems can be described in terms of gain and loss with a coupled environment—a hard feature to tune in quantum devices. Now an experiment shows non-Hermitian topology in a quantum Hall ring without relying on gain and loss.

Elementary excitations of electronic devices have potential use in quantum information but control and readout capabilities are not as developed as they are for more mature systems such as photonic qubits. Here the authors develop and demonstrate a tomographic protocol for electron and hole wavefunctions.

High-precision cross-sections of the nuclear reaction that burns deuterium to create helium-3 are used to produce theoretical estimates of the primordial baryon density that are in agreement with recent astronomical observations.

Quantum transport of fractional quasiparticles can drastically differ from conventional charge transport. Here the authors demonstrate Andreev-like reflection of a fractional quasiparticle incident on a barrier in the fractional quantum Hall regime.

Minimal-excitation fermionic quasiparticles are created by applying a potential with Lorentzian time dependence to the contact of a narrow constriction in a two-dimensional electron gas.

Charge and thermal transport in low-dimensional and mesoscopic systems exhibit significant deviation from classical behaviour. Here the authors study quantitatively how heat flow in a quantum circuit is affected by thermal shot noise and Coulomb interactions.

The electrical conductance across quantum point contacts shows quantum steps that are well understood except for some anomalies. Here, the authors are able to explain their origin in terms of spontaneously localized electron states by tuning the potential landscape of the contact with a scanning gate microscope.

When physicists study the characteristics of quantum conductors they usually take great pains to limit the resistance of other elements in the system. But Jezouin et al. show that when a single quantum channel is measured in series with a resistor, it exhibits analogous characteristics to a Tomonaga–Luttinger liquid.

Previous work on charge Kondo circuits, in which a spin is formed by two degenerate charge states of a metallic island, has been limited to transport measurements of multi-channel Kondo problems. Piquard et al. use thermodynamic measurements via a charge sensor to study the evolution of a single Kondo impurity.

At the nanoscale, the conductance of a coherent conductor is reduced by the back-action of the circuit in which it is inserted. The effect has been primarily studied for cases where it is small, but these authors explore the regime of strong back-action—with conductance reductions of up to 90%—and propose a generalized expression for the conductance of quantum channels embedded in linear circuits.

Mesoscopic electrical circuits are an ideal platform to explore quantum phenomena, but this requires cooling the electrons to very low temperature, which is challenging. Here, the authors employ three different in situthermometers to report electronic quantum transport at 6mK in a micrometer-scale circuit.

A device consisting of a metallic island connected to electrodes via tunable semiconductor-based conduction channels is used to explore the evolution of charge quantization in the presence of quantum fluctuations; the measurements reveal a robust scaling of charge quantization as the square root of the residual electron reflection probability across a quantum channel, consistent with theoretical predictions.

Zero-temperature quantum phase transitions and their associated quantum critical points are believed to underpin the exotic finite-temperature behaviours of many strongly correlated electronic systems, but identifying the microscopic origins of these transitions can be challenging and controversial; Iftikhar et al. (see also the related paper by Keller et al.) show how such behaviours can be engineered into nanoelectronic quantum dots, which permit both precise experimental control of the quantum critical behaviour and its exact theoretical characterization.

In nanoscale electronic circuits, controlling the flow of heat is essential. A demonstration of a heat Coulomb blockade arising from thermal many-body effects shows that thermal transport follows distinct rules in the quantum regime.