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• ### One for all

Predicting collapses of a complex system is notoriously hard. Finding ways to pull a collapsed system back to normal is even harder. A theoretical study now shows how reviving a single unit of a failed network might restore its whole functionality.

• Patrick Desrosiers
• Xavier Roy-Pomerleau
News & Views
• ### Realizing discontinuous quantum phase transitions in a strongly correlated driven optical lattice

Studies of first-order phase transitions in quantum simulators have so far been restricted to the weakly interacting regime. A tunable discontinuous phase transition has now been realized with strongly correlated atoms in a driven optical lattice.

• Bo Song
• Shovan Dutta
• Ulrich Schneider
Letter
• ### Reviving a failed network through microscopic interventions

Perturbations and disturbances can bring complex networks into undesirable states in which global functionality is suppressed. Now, a recovery scheme explains how to revive a damaged network by controlling only a small number of nodes.

• Hillel Sanhedrai
• Jianxi Gao
• Baruch Barzel
Article
• ### Rotation symmetry breaking in the normal state of a kagome superconductor KV3Sb5

The precise nature of the charge-density-wave state in kagome superconductors remains unclear. Now, local spectroscopy shows that rotational symmetry in real space is broken, with one direction being distinct from the other two.

• Hong Li
• He Zhao
• Ilija Zeljkovic
Letter

• Bart Verberck
News & Views
• ### Freeform fabrication

• Nina Meinzer
News & Views
• ### Pinning down the proton

• Mark Buchanan
Thesis
• ### A year of Guided OA

The Guided Open Access pilot we are trialling with five other journals in the Nature Portfolio will continue into 2022. We highlight some of the main lessons we’ve learned so far.

Editorial
• ### The heat of the moment

To celebrate the International Year of Basic Sciences for Sustainable Development, James Gallagher tells the story of the British thermal unit, a unit for heat.

• James Gallagher
Measure for Measure
• ### Twofold van Hove singularity and origin of charge order in topological kagome superconductor CsV3Sb5

Spectroscopic measurements show how the features of the band structure related to the kagome lattice in CsV3Sb5 contribute to the observed strongly correlated phases.

• Mingu Kang
• Shiang Fang
• Riccardo Comin
Article
• ### Forbidden by symmetry

The physics of large systems is often understood as the outcome of the local operations among its components. Now, it is shown that this picture may be incomplete in quantum systems whose interactions are constrained by symmetries.

• Álvaro M. Alhambra
News & Views
• ### From storms to cyclones at Jupiter’s poles

The atmospheres of most planets in our Solar System have a single large cyclonic vortex at each of their poles. Jupiter with its polygonal cyclones surrounding a single one, however, falls out of line, owing to an energy transfer to larger scales.

• Agustín Sánchez-Lavega
News & Views
• ### Ciliary beating patterns map onto a low-dimensional behavioural space

The beating of motile cilia arises from the collective action of hundreds of proteins. A study of the dynamics of cilia under different environmental and genetic conditions shows that the space of beating variations is low-dimensional.

• Veikko F. Geyer
• Jonathon Howard
• Pablo Sartori
Article Open Access
• ### Moist convection drives an upscale energy transfer at Jovian high latitudes

Infrared images of Jupiter taken by the Juno spacecraft reveal an energy transfer driven by moist convection. This mechanism is expected to enhance heat transfer, which might also be relevant to Earth’s atmosphere.

• Lia Siegelman
• Patrice Klein
• Giuseppe Sindoni
Article Open Access
• ### Observation of a reduced-turbulence regime with boron powder injection in a stellarator

In stellarators, turbulence is detrimental for the confinement of the plasma. In the Large Helical Device, a confinement regime with reduced turbulence and improved confinement is observed.

• F. Nespoli
• S. Masuzaki
• T. Morisaki
Article Open Access
• ### Restrictions on realizable unitary operations imposed by symmetry and locality

In systems with no symmetry, local operations can combine to make any unitary transformation across a whole quantum system, but if symmetries limit the allowed operations, they cannot all be generated using local transformations.

• Iman Marvian
Article
• ### Publisher Correction: Engineering crystal structures with light

• Ankit S. Disa
• Tobia F. Nova
• Andrea Cavalleri
Publisher Correction
• ### Precise determination of the $$B_{\mathrm{s}}^0$$–$$\overline B_{\mathrm{s}}^0$$ oscillation frequency

The LHCb collaboration reports an improved measurement of the oscillation frequency of mesons consisting of a bottom quark and strange quark, which is then combined with previous results.

• R. Aaij
• C. Abellán Beteta
• G. Zunica
Article Open Access
• ### Information dissemination

The dynamics of quantum information and entanglement is closely linked to the physics of thermalization. A quantum simulator comprised of superconducting qubits has measured the spread of quantum information in a many-body system.

• A. Safavi-Naini
News & Views
• ### The preferred direction

Observations of an electronic state where rotational symmetry is broken show that this could be a generic feature of moiré materials.

• Benjamin E. Feldman
News & Views