Review EN
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Where Does the Quantum World End? An Operational FBA View on Nanoparticle Interference (MUSCLE)
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5 min read
In 2026, a Vienna team demonstrated quantum interference of sodium nanoparticles with more than 7,000 atoms (masses >170,000 Da) in the MUSCLE interferometer—setting a new size record for matter-wave interference. “Where does the quantum world end?” can thus be sharpened experimentally: How large may an object become, and how “classical” may its environment be, before…
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In a new CMS analysis at the CERN LHC, Z bosons are used as a “tag” in PbPb heavy-ion collisions, and in Z–hadron correlations a soft depletion/wake signature is found on the away-side. If a “cosmic primordial soup” truly responds like a fluid, then exactly such a pattern should show up as a precise, repeatable…
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Ekpyrotic Universe from an FBA Perspective: A Good Early-Cosmology Idea, but Only with Hard Channel Separation
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6 min read
The Spektrum podcast picks up a real primary line: in https://arxiv.org/abs/hep-th/0103239 the hot Big Bang is described as the result of a brane collision in an extra-dimensional setting; the model starts from a cold, nearly static state and claims to address the horizon, flatness, and monopole problems without a standard inflationary phase. At the same…
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In the Spektrum podcast on warm inflation (discussed since 1995), the focus is on a new PRL/preprint model (2025) that contrasts the standard assumption of cold inflation (near-vacuum during inflation, reheating afterwards) with a sustained thermal bath throughout the inflationary phase. This shifts the emphasis: not only how fast space expands, but whether particle production/dissipation…
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The work by Koch, Riahinia & Rincon (Phys. Rev. D 112, 084056, 2025 / arXiv:2510.00117) introduces “q-desics” as quantum-corrected analogues of geodesics and derives an equation of motion based on expectation values of operators such as the affine connection (not only on ⟨g⟩). In the example of static, spherically symmetric quantum-gravity backgrounds, the authors report…
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The WinFuture article popularizes an optics result whose primary source is Yessenov et al. (arXiv 2025; Optica 2026): a direct observation of a spatially structured Montgomery effect (lensless self-imaging) that generalizes the Talbot effect to aperiodic structures and is claimed to show repeated strongly focused spots (~10 µm) in free space. According to the abstract, a dynamic…
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In https://arxiv.org/abs/2510.13124 (Ghalekohneh & Zhao, preprint 2025), a decomposition of non-reciprocal, far-field radiative heat transfer in multi-body emitter networks is described: the heat current is split into an equilibrium contribution with persistent internal circulation and a non-equilibrium contribution for exchange with the environment; the latter is claimed to be engineerable such that “perfect” thermal rectification…
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Starting point is https://www.fr.de/wissen/wie-ein-mysterioeser-neutrino-fund-drei-mysterien-der-physik-loesen-koennte-94157428.html (context); in https://arxiv.org/abs/2505.22722 (preprint, v2 2026), Baker et al. argue that a population of quasi-extremal primordial black holes with “dark U(1)” charge can make the PeV neutrino fluxes of KM3NeT (around 100 PeV) and IceCube (above 1 PeV) simultaneously compatible with gamma-background constraints and LHAASO non-observations—and may even constitute all of the dark…
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In Crespi et al. (Monthly Notices of the Royal Astronomical Society, 2026; arXiv 2025), Sgr A* is modeled as a fermionic dark-matter core plus halo; the authors report that the orbital parameters derived for S2 and five G sources differ from a BH-potential variant by less than one percent. Pelle et al. (MNRAS, 2024) ray-trace such fermion cores…
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In https://arxiv.org/abs/2504.15495 (preprint; PRL 136 (2026) 057201), Morrell, Elliott & Grier show that two acoustically levitated EPS spheres can enter emergent active stationary states without periodic driving; in one regime, these states break spatiotemporal symmetry and form a continuous classical time crystal. The authors also provide data and analysis code as an OSF repository (https://dx.doi.org/10.17605/OSF.IO/SX7UG).…