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Nature Physics, Published online: 09 January 2024; doi:10.1038/s41567-023-02359-y

A promising pathway towards the laser cooling of a molecule containing a radioactive atom has been identified. The unique structure of such a molecule means that it can act as a magnifying lens to probe fundamental physics.

Nature Physics, Published online: 09 January 2024; doi:10.1038/s41567-023-02296-w

Measurements of the rovibronic structure of radium monofluoride molecules allow the identification of a laser cooling scheme. This will enable precise tests of fundamental physics, such as searches for parity or time-reversal symmetry violation.

Nature Physics, Published online: 09 January 2024; doi:10.1038/s41567-023-02301-2

Experiments with active colloidal fluids in large-scale hydraulic networks reveal a connection between emergent flows and dynamical spin-ice patterns.

Nature Physics, Published online: 09 January 2024; doi:10.1038/s41567-023-02302-1

Friction forces at the interface between tissues play a key role in tissue morphogenesis. Now friction at the cellular scale is shown to influence cell shape and cell rearrangements.

Nature Physics, Published online: 08 January 2024; doi:10.1038/s41567-023-02314-x

Orderly or coherent multicellular flows are fundamental in biology, but their triggers are not understood. In epithelial tissues, the tug-of-war between cells is now shown to lead to intrinsic asymmetric distributions in cell polarities that drive such flows.

Nature Physics, Published online: 08 January 2024; doi:10.1038/s41567-023-02293-z

The key to enhance the output of a thermoelectric device is to be able to regulate the thermoelectric voltage generation. Topological magnet Co3Sn2S2-based devices show the way to achieve that goal.

Nature Physics, Published online: 08 January 2024; doi:10.1038/s41567-023-02295-x

Coherent motion of cells plays an important role in morphogenesis. Experiments with cellular rings, supported by numerical simulations, suggest that cell polarity and acto-myosin cables are important factors in the onset of coherence.

Nature Physics, Published online: 05 January 2024; doi:10.1038/s41567-023-02282-2

An error detecting code running on a trapped-ion quantum computer protects expressive circuits of eight logical qubits with a high-fidelity and partially fault-tolerant implementation of a universal gate set.

Nature Physics, Published online: 05 January 2024; doi:10.1038/s41567-023-02284-0

The Haldane model is a paradigmatic example of topological behaviour but has not previously been implemented in condensed-matter experiments. Now a moiré bilayer is shown to realize this model with the accompanying quantized transport response.

Nature Physics, Published online: 05 January 2024; doi:10.1038/s41567-023-02291-1

Thermoelectric measurements show an unusual form of critical behaviour at the superconducting quantum phase transition in monolayer WTe2.

Nature Physics, Published online: 04 January 2024; doi:10.1038/s41567-023-02285-z

The ability to extract information from diffuse background signals in ultrafast electron diffraction experiments now enables a direct view of the formation of topological defects during a light-induced phase transition.

Nature Physics, Published online: 04 January 2024; doi:10.1038/s41567-023-02290-2

Subwavelength photonic gratings can host long-lived, negative-effective-mass photonic modes that couple strongly to electron transitions in constituent active materials. The resulting bosonic hybrid light–matter modes, or exciton-polaritons, can be optically configured to accumulate into various macroscopic artificial complexes and lattices of coherent quantum fluids.

Nature Physics, Published online: 04 January 2024; doi:10.1038/s41567-023-02281-3

Bound states in the continuum are topological states with useful symmetry protection properties. An experiment now shows how to use them to form macroscopically coherent complexes of polariton condensates.

Nature Physics, Published online: 04 January 2024; doi:10.1038/s41567-023-02272-4

Metallic kagome compounds are known to host several different electronic phases. Now, evidence for a form of nematic order that breaks time-reversal symmetry and is odd under a parity transformation is found in CsV3Sb5.

Nature Physics, Published online: 04 January 2024; doi:10.1038/s41567-023-02279-x

Topological defects play a crucial role in the behaviour of strongly correlated materials out of equilibrium. Now, ultrafast electron diffraction measurements on 1T-TiSe2 shed light on the defect formation process at sub-picosecond timescales.