Nature Physics, Published online: 02 February 2026; doi:10.1038/s41567-025-03138-7
Gallium arsenide photocathodes inside a superconducting radio-frequency gun are a promising source of polarized electrons for future colliders. Now the operation of such a source has been demonstrated.
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- Towards advanced polarized electron sources
- Co-propagating photonic topological interface states with hybridized pseudo-spinsNature Physics, Published online: 02 February 2026; doi:10.1038/s41567-026-03172-z Topological interface states typically support the propagation of a single state in each direction, which limits their applicability. Now, co-propagating states are achieved in a photonic topological insulator system.
- Radiofrequency gun for spin-polarized electron beamsNature Physics, Published online: 02 February 2026; doi:10.1038/s41567-025-03164-5 Spin-polarized electron beams are important for fundamental physics, but they could only be generated using DC electron guns. Now, a radiofrequency electron gun for polarized electrons has been realized, promising to overcome beam quality limitations.
- Lattice surgery realized on two distance-three repetition codes with superconducting qubitsNature Physics, Published online: 30 January 2026; doi:10.1038/s41567-025-03090-6 Quantum error correction codes protect quantum information, but running algorithms also requires the ability to perform gates on logical qubits. A lattice surgery scheme for fault-tolerant gates has now been demonstrated in a quantum repetition code.
- Observation of dissipationless fractional Chern insulatorNature Physics, Published online: 30 January 2026; doi:10.1038/s41567-025-03167-2 Fractional Chern insulators have been observed in moiré MoTe2 at zero magnetic field, but the expected zero longitudinal resistance has not been demonstrated. Now it is shown that improving device quality allows this effect to appear.
- Quantum computing isn’t just about scalingNature Physics, Published online: 30 January 2026; doi:10.1038/s41567-025-03110-5 The race to demonstrate quantum error correction often focuses on making ever-larger devices. A demonstration showing that splitting a surface-code logical qubit into two simpler repetition codes substantially reduces logical gate errors reminds us that advancing quantum computing does not hinge solely on scaling qubit numbers.
- Spontaneous switching in a protein signalling array reveals near-critical cooperativityNature Physics, Published online: 29 January 2026; doi:10.1038/s41567-025-03158-3 Many biological systems appear to organize their dynamics close to a critical point. Now it is shown that the protein array mediating Escherichia coli chemosensing is near-critical, enabling large signal amplification without compromising response speeds.
- Bacterial sensors poised at criticalityNature Physics, Published online: 29 January 2026; doi:10.1038/s41567-025-03160-9 Spontaneous switching between active and inactive states in bacterial chemosensory arrays is shown to operate near a critical point. Through biologically controlled disorder, cells balance high signal gain with fast response.
