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> general relativistic magnetohydrodynamical (GRMHD) Magnetohydrodynamics; fluids and electricity: https://en.wikipedia.org/wiki/Magnetohydrodynamics https://

> general relativistic magnetohydrodynamical (GRMHD) Magnetohydrodynamics; fluids and electricity: https://en.wikipedia.org/wiki/Magnetohydrodynamics https://en.wikipedia.org/wiki/Magnetohydrodynamics Magnetorotational instability: https://en.wikipedia.org/wiki/Magnetorotational_instability https://en.wikipedia.org/wiki/Magnetorotational_instability SPH: 1970s QHD: Quantum Hydrodynamics SQS: Superfluid Quantum Space SQG: Superfluid Quantum Gravity and SQR: Superfluid Quantum Relativity Fedi's > Schwarzschild radius Does this image help to confirm or reject the Shwarzschild radius, or whether black holes have hair or turbulence at the boundary we've been calling the event horizon though Hawking radiation permeates through all such boundaries in at least some directions? > which may be due to a Doppler boost from the rapid rotation of the accretion disc. How much does the thermal energy vary within the (already physically distributed) matter surrounding the black hole? Isn't there reason to believe that things are in a different phase of matter at those darker temperatures ? Are there superfluid states at those thermal ranges? Are our phase transition diagrams complete? Standard phase transition diagrams do not describe the Mpemba effect, for example. TODOcite. Does fusion plasma research have insight into the phases of matter at higher temperatures? What are the temperatures around the disturbance? Does M87a show a similar Doppler effect as this analysis suggests affects the 2017 EHT Sgr A* image?

westurner 2y ago
> Mpemba effect, phase transitions And whether that matters for imaging of an accretion disc > From "Exploring Quantum Mpemba Effects" (2024) https://physics.aps.org/articles/v17/10 https://physics.aps.org/articles/v17/10 : > Similar processes, in which a system relaxes to equilibrium more quickly if it is initially further away from equilibrium, are being intensely explored in the microscopic world. Now three research teams provide distinct perspectives on quantum versions of Mpemba-like effects, emphasizing the impact of strong interparticle correlations, minuscule quantum fluctuations, and initial conditions on these relaxation processes [3–5]. The teams’ findings advance quantum thermodynamics Is quantum thermodynamics modeled in the (GRMHD) magnetohydrodynamics applied? From https://news.ycombinator.com/item?id=42369294#42371946 https://news.ycombinator.com/item?id=42369294#42371946 https://westurner.github.io/hnlog/#comment-42371946 https://westurner.github.io/hnlog/#comment-42371946 : > Dark fluid: https://en.wikipedia.org/wiki/Dark_fluid https://en.wikipedia.org/wiki/Dark_fluid : >> Dark fluid goes beyond dark matter and dark energy in that it predicts a continuous range of attractive and repulsive qualities under various matter density cases. Indeed, special cases of various other gravitational theories are reproduced by dark fluid, e.g. inflation, quintessence, k-essence, f(R), Generalized Einstein-Aether f(K), MOND, TeVeS, BSTV, etc. Dark fluid theory also suggests new models, such as a certain f(K+R) model that suggests interesting corrections to MOND that depend on redshift and density

westurner 2y ago

> Mpemba effect, phase transitions And whether that matters for imaging of an accretion disc > From "Exploring Quantum Mpemba Effects" (2024) https://physics.aps.org/articles/v17/10 https://physics.aps.org/articles/v17/10 : > Similar processes, in which a system relaxes to equilibrium more quickly if it is initially further away from equilibrium, are being intensely explored in the microscopic world. Now three research teams provide distinct perspectives on quantum versions of Mpemba-like effects, emphasizing the impact of strong interparticle correlations, minuscule quantum fluctuations, and initial conditions on these relaxation processes [3–5]. The teams’ findings advance quantum thermodynamics Is quantum thermodynamics modeled in the (GRMHD) magnetohydrodynamics applied? From https://news.ycombinator.com/item?id=42369294#42371946 https://news.ycombinator.com/item?id=42369294#42371946 https://westurner.github.io/hnlog/#comment-42371946 https://westurner.github.io/hnlog/#comment-42371946 : > Dark fluid: https://en.wikipedia.org/wiki/Dark_fluid https://en.wikipedia.org/wiki/Dark_fluid : >> Dark fluid goes beyond dark matter and dark energy in that it predicts a continuous range of attractive and repulsive qualities under various matter density cases. Indeed, special cases of various other gravitational theories are reproduced by dark fluid, e.g. inflation, quintessence, k-essence, f(R), Generalized Einstein-Aether f(K), MOND, TeVeS, BSTV, etc. Dark fluid theory also suggests new models, such as a certain f(K+R) model that suggests interesting corrections to MOND that depend on redshift and density