Next Events
- International School on Advanced Quantum Materials 13/07/2026 – 17/07/2026 – 00:00
- ICHEP - 2026 - 43rd International Conference in HIgh Energy Physics 30/07/2026 – 05/08/2026 – 00:00
- SEFIS - Physics Week at UNICAMP 04/08/2026 – 08/08/2026 – 00:00
- IMRC - 2026 - 34th International Materials Research Congress 16/08/2026 – 20/08/2026 – 00:00
- VIII SEAFís - Academic Week of Physics at UFV 19/08/2026 – 21/08/2026 – 08:00
- CHIP IN SAMPA 24/08/2026 – 28/08/2026 – 08:00
Blog
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Topological suppression of quantum tunnelling in a lanthanide single-ion molecular magnet
Quantum coherence can be preserved by exploiting topology, encoding information in global geometric properties that resist local perturbations. These properties depend on the trajectory of quantum operations and curvature in parameter space, offering a topology-based route to fault-tolerant quantum computation. While geometric phase interference (Berry phase) is widely studied to probe a system’s topology, its direct detection in 4f-based molecular magnets—promising qudit platforms—has remained elusive. We present a magneto-spectroscopic μSQUID-EPR approach to resolve tunnel splittings in the Gd-based molecular magnet [160GdPcâ‚‚]â» (Pc = phthalocyanine). By irradiating single crystals with microwaves under transverse magnetic fields, we map the spin (S = 7/2) manifold and observe pronounced oscillations in tunnel splitting—a hallmark of quantum phase interference. These oscillations reveal topological quenching and higher-order anisotropy, underscoring the role of topology in 4f systems and opening pathways toward holonomic quantum computation.
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IBM Debuts World’s First Sub-1 Nanometer Chip Technology
Built with revolutionary “nanostack” 3D chip architecture, IBM’s sub-1 nm chip to propel semiconductor industry forward for the next decade
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Ultrathin nanotubes reach 1 nanometer, opening path to smaller electronics
Researchers in Japan have created some of the world's smallest semiconducting nanotubes, structures 100,000 times thinner than a human hair. By growing molybdenum disulfide inside protective tubes of boron nitride, the researchers, including those from the University of Tokyo, produced highly uniform tubes just 1 nanometer wide, a scale at which it's difficult to make stable nanotube structures. The work confirms decades-old theoretical predictions about how these ultrafine materials behave and could also provide a new route toward miniaturized electronic devices.
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