Nature Physics, Published online: 24 January 2025; doi:10.1038/s41567-024-02727-2
Quantum error correction is essential for reliable quantum computing, but no single code supports all required fault-tolerant gates. The demonstration of switching between two codes now enables universal quantum computation with reduced overhead.
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- Experimental fault-tolerant code switching
- Time-hidden magnetic order in a multi-orbital Mott insulatorNature Physics, Published online: 23 January 2025; doi:10.1038/s41567-024-02752-1 Searches for metastable states with properties not found in thermal equilibrium have been restricted to either ultrafast or slow timescales. A metastable state in an intermediate time window has now been identified in a photo-doped Mott insulator.
- Gauge theories on a quantum computerNature Physics, Published online: 23 January 2025; doi:10.1038/s41567-024-02758-9 Many important models in theoretical physics — including the standard model of particle physics — are governed by local ‘gauge’ symmetries. Now, a quantum computer has successfully simulated a lattice gauge theory by leveraging this rich symmetry structure.
- Free-electron quantum opticsNature Physics, Published online: 22 January 2025; doi:10.1038/s41567-024-02743-2 Free-electron quantum optics is an emerging field that requires a quantum-mechanical description of both the electronic and the optical contributions. This Perspective summarizes recent developments and discusses challenges and opportunities.
- Programmable simulations of molecules and materials with reconfigurable quantum processorsNature Physics, Published online: 22 January 2025; doi:10.1038/s41567-024-02738-z Quantum simulations of chemistry and materials are challenging due to the complexity of correlated systems. A framework based on reconfigurable qubit architectures and digital–analogue simulations provides a hardware-efficient path forwards.
- Where analogue and digital meetNature Physics, Published online: 22 January 2025; doi:10.1038/s41567-024-02755-y Realizing a useful quantum advantage on noisy intermediate-scale quantum hardware is challenging. A proposal now suggests a hybrid digital–analogue hardware-efficient approach for reconfigurable qubit platforms to simulate strongly interacting matter.
- Tissue wrinkles foreshadow cancerNature Physics, Published online: 22 January 2025; doi:10.1038/s41567-024-02763-y In a cancer mouse model, wrinkling patterns in bladder-lining tissue differ from their healthy counterparts. Changes in tissue-mechanical properties that alter elastic buckling instabilities explain this observation.
- Antihydrogen’s more than fine spectrumNature Physics, Published online: 21 January 2025; doi:10.1038/s41567-024-02733-4 Antihydrogen is the simplest atom of pure antimatter. Measurements of a pair of ultraviolet spectral lines with laser spectroscopy provide stringent bounds on the magnitude by which a symmetry between matter and antimatter may be violated.
