This month we celebrate Nature Physics' twentieth birthday, consider the flexoelectricity of water ice, and feature a Perspective on chiral phonons. Have a look at https://t.co/rw5cog4BOn

A device for rectifying supercurrents at liquid-nitrogen temperature with high efficiency is demonstrated. This is a practical step towards implementing dissipationless electronics. https://t.co/7BmAcCbF0l

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The Hubbard model describes the physics of strongly correlated electron systems, but is difficult to solve. Now, a scheme to systematically and efficiently relate the exactly solvable Hatsugai–Kohmoto model to the Hubbard model has been identified. https://t.co/lI5XaxW8iT

Coherently projecting a quantum state may allow it to be probed from a distance. This is now demonstrated for a Yu–Shiba–Rusinov state using a quantum corral. https://t.co/mYupcHiDUm

Quantum low-density parity-check codes are anticipated to be an efficient approach to quantum error correction. Now it has been proven that these codes can be time-efficient with only a constant overhead in the required number of qubits. https://t.co/zgDo8hogmG

Finding a classical description of a quantum state can require resource-intensive tomography protocols. It has now been shown that, for bosonic systems, tomography is extremely inefficient in general, but can be done efficiently for some useful states. https://t.co/twaKz3hrXN

Magnetic toroidal invariance generates transverse electromagnetic effects in materials with broken symmetries. Now a distinct magnetic response is observed in ferro-rotational systems in which both inversion and time-reversal symmetries are preserved. https://t.co/JDrNlhYUIL

A proposed theoretical explanation for the electronic behaviour of moiré graphene is the coexistence of light and heavy electrons. Now local thermoelectric measurements suggest that this model could be accurate. https://t.co/Og1ZzyCDts

Optical spin defects in semiconductors are crucial for applications, but it is often difficult to establish their microscopic origin. A mechanism for the spin behaviour of a family of bright emitters in hexagonal boron nitride has now been identified. https://t.co/B8EOml3q52

Water has remarkable dynamic properties; a transition from a fragile to a strong liquid has been proposed to explain how they change on cooling. Experiments now show evidence for such a transition in bulk supercooled water at around 233 K. https://t.co/Hb36XWuasY

The standard band structure picture cannot be applied to amorphous materials as they lack crystal symmetry. Now a first-principles approach captures the possibility of band-like electron transport in amorphous solids, with In₂O₃ as an example. https://t.co/iFkBK57YcU

In our new issue, we reflect on this year's Nobel Prize, feature a Review on topological states in 2D materials, and learn that fungi can control fluid flows in porous media. Have a look at https://t.co/qjfInGDyoI

This Review describes the concepts behind generalized quantum Hall effects that can take place without a magnetic field, and summarizes recent experimental manifestations of these phenomena in twisted two-dimensional materials and few-layer graphene. https://t.co/8WN6c8JCz4

Attosecond control of electrons in nanostructures requires resolving dynamics in the optical near field. Now, an experiment finds low-energy spectral stripes that track subcycle electron emission and allow the isolation of attosecond electron bursts. https://t.co/ohLuM674QU

Lacking translational symmetry, the momentum-space description of quasicrystals is distinct from that of fully crystalline materials. Now, a quasicrystal with two 2D layers links different momenta from the individual layers, allowing new excitons to form. https://t.co/ynyH8kIs5r

The common description of strong-field light–matter interaction neglects the quantum-optical nature of the driving field. Now signatures of strong-field photoemission appear in electron energy spectra when driving with non-classical light. https://t.co/5jptlQaDJS

Nonlinear thermoelectric transport arising from inversion-symmetry breaking has been predicted theoretically. Now, the nonlinear chiral thermoelectric Hall effect has been experimentally demonstrated for tellurium at room temperature. https://t.co/zBEmEWecEI

Photonic quasiparticles are neutral, so controlling them by coupling with external fields is generally impossible. Now, by synthesizing a two-level photonic system, coupling with an electric field becomes possible and enables electrical control. https://t.co/uBtojI9yEZ

The hunt for a quantum spin liquid has involved many different material families and models. Now, Zn-barlowite has been found to have similar behaviour to another candidate material, herbertsmithite, hinting there may be universal physical behaviour. https://t.co/3b9n194qgI

Direct coupling between electrons, photons and phonons is challenging due to energy and momentum mismatches. Now, it is possible to achieve steady-state electron–phonon–photon excitation through nonlinear lasing by suppressing spontaneous emission. https://t.co/OxSUoBCoXD

Propagation of membrane tension mediates communication on the membrane surface. It is now shown that membrane-bound obstacles can obstruct tension propagation, which helps to localize signalling. https://t.co/z4xCVAWPpo