3 ms·

The space changes, so GR and the speed of light are preserved. "Slow and fast light in plasma using optical wave mixing" (2021) https://journals.aps.org/prl/ab

The space changes, so GR and the speed of light are preserved. "Slow and fast light in plasma using optical wave mixing" (2021) https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.126.205001 https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.12... .. https://scholar.google.com/scholar?cluster=9479750199684683164&hl=en&as_sdt=5,43&sciodt=0,43 https://scholar.google.com/scholar?cluster=94797501996846831... : > We show the first experimental demonstration of slow and fast light in a plasma, measuring group velocities between 0.12⁢c and −0.34⁢c . Also, photons can be FTL (relative to an outside observer) in dielectrics; > LightSlinger antennae are FTL within the dielectric, but the EMR is not FTL; from https://news.ycombinator.com/item?id=37342016 https://news.ycombinator.com/item?id=37342016 Also, do these findings apply to this post-Fourier model of thermal spreading limits at material interfaces given phase ? From https://news.ycombinator.com/item?id=45921309 https://news.ycombinator.com/item?id=45921309 : > ScholarlyArticle: "Time-domain theory of transient heat conduction in the local limit" (2025) https://journals.aps.org/prb/abstract/10.1103/p8wg-p1j3 https://journals.aps.org/prb/abstract/10.1103/p8wg-p1j3 > NewsArticle: "From engines to nanochips: Physicists redefine how heat really moves" (2025-10) https://phys.org/news/2025-10-nanochips-physicists-redefine.html https://phys.org/news/2025-10-nanochips-physicists-redefine....

westurner 1y ago
But specifically on velocity in superfluids or superfluids aka BEC Bose-Einstein Condensates, This model predicts the multi body gravitational motions of the planets including the perihelion of Mercury and also vortices in superfluids: "Physical vacuum as a dilatant fluid yields exact solutions to Pioneer anomaly and Mercury’s perihelion precession" (2019) https://cdnsciencepub.com/doi/10.1139/cjp-2018-0744 https://cdnsciencepub.com/doi/10.1139/cjp-2018-0744 .. https://news.ycombinator.com/item?id=45220585 https://news.ycombinator.com/item?id=45220585 This model derives gravity from the Standard Model of particle physics: "Perihelion precession of planetary orbits solved from quantum field theory" (2025) https://arxiv.org/abs/2506.14447 https://arxiv.org/abs/2506.14447 .. https://news.ycombinator.com/item?id=45220460 https://news.ycombinator.com/item?id=45220460 And this model describes all in terms of consistency maximization > "The Self-Consistent Coherence-Maximizing Universe: Complete Derivation of the Standard Model and General Relativity from Mathematical Self-Consistency" (2025) https://www.academia.edu/144466150/The_Self_Consistent_Coherence_Maximizing_Universe_Complete_Derivation_of_the_Standard_Model_and_General_Relativity_from_Mathematical_Self_Consistency https://www.academia.edu/144466150/The_Self_Consistent_Coher... : > Abstract: We derive the complete structure of fundamental physics from a single principle: Quantum coherence maximization under self-consistency constraints. [...] And this model describes all terms in terms of Consistency Functional K; https://news.ycombinator.com/item?id=45909513 https://news.ycombinator.com/item?id=45909513 : "The Consistency Functional K: Variational Unification of Quantum Mechanics, Thermodynamics, and General Relativity" (2025) https://doi.org/10.5281/zenodo.17405041 https://doi.org/10.5281/zenodo.17405041 \delta\mathcal{K}(\rho, g) = 0 And Wolfram has a unified theory, too What are the limits to model unification?

westurner 1y ago

But specifically on velocity in superfluids or superfluids aka BEC Bose-Einstein Condensates, This model predicts the multi body gravitational motions of the planets including the perihelion of Mercury and also vortices in superfluids: "Physical vacuum as a dilatant fluid yields exact solutions to Pioneer anomaly and Mercury’s perihelion precession" (2019) https://cdnsciencepub.com/doi/10.1139/cjp-2018-0744 https://cdnsciencepub.com/doi/10.1139/cjp-2018-0744 .. https://news.ycombinator.com/item?id=45220585 https://news.ycombinator.com/item?id=45220585 This model derives gravity from the Standard Model of particle physics: "Perihelion precession of planetary orbits solved from quantum field theory" (2025) https://arxiv.org/abs/2506.14447 https://arxiv.org/abs/2506.14447 .. https://news.ycombinator.com/item?id=45220460 https://news.ycombinator.com/item?id=45220460 And this model describes all in terms of consistency maximization > "The Self-Consistent Coherence-Maximizing Universe: Complete Derivation of the Standard Model and General Relativity from Mathematical Self-Consistency" (2025) https://www.academia.edu/144466150/The_Self_Consistent_Coherence_Maximizing_Universe_Complete_Derivation_of_the_Standard_Model_and_General_Relativity_from_Mathematical_Self_Consistency https://www.academia.edu/144466150/The_Self_Consistent_Coher... : > Abstract: We derive the complete structure of fundamental physics from a single principle: Quantum coherence maximization under self-consistency constraints. [...] And this model describes all terms in terms of Consistency Functional K; https://news.ycombinator.com/item?id=45909513 https://news.ycombinator.com/item?id=45909513 : "The Consistency Functional K: Variational Unification of Quantum Mechanics, Thermodynamics, and General Relativity" (2025) https://doi.org/10.5281/zenodo.17405041 https://doi.org/10.5281/zenodo.17405041 \delta\mathcal{K}(\rho, g) = 0 And Wolfram has a unified theory, too What are the limits to model unification?