#theoretical-physics — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #theoretical-physics, aggregated by home.social.
-
Noether’s Theorem: Symmetry→Conservation Law.
Symmetries of the action imply conserved quantities per Noether's theorem.
A path q(t) is shifted by δq = φ but smoothed in transition layers τ wide at t0 and t1, where Δq̇ ≈ φ/τ. Action changes there approximate ΔS ≈ (∂L/∂q̇) Δq̇ τ ≈ −(∂L/∂q̇ φ)(t1) and ≈ +(∂L/∂q̇ φ)(t0).
Symmetry sets total ΔS = 0, hence (∂L/∂q̇ φ) is conserved from t0 to t1.Momentum conservation's derivation from space translation symmetry and energy conservation from time translation symmetry in mechanics and physics is done by it.
#NoethersTheorem #Physics #TheoreticalPhysics #ClassicalMechanics #AnalyticalMechanics #LagrangianMechanics #Symmetry #ConservationLaws #ActionPrinciple #CalculusOfVariations #Mathematics #STEM #Science #PhysicsEducation #LearnPhysics #QuantumPhysics #FieldTheory #GeneralizedCoordinates #MomentumConservation #EnergyConservation #AngularMomentum #TheoreticalScience #PhysicsNotes #Infographic #ScienceCommunication #EducationalContent #EMNoether #MathPhysics #PhysicsStudents #STEMEducation
-
Noether’s Theorem: Symmetry→Conservation Law.
Symmetries of the action imply conserved quantities per Noether's theorem.
A path q(t) is shifted by δq = φ but smoothed in transition layers τ wide at t0 and t1, where Δq̇ ≈ φ/τ. Action changes there approximate ΔS ≈ (∂L/∂q̇) Δq̇ τ ≈ −(∂L/∂q̇ φ)(t1) and ≈ +(∂L/∂q̇ φ)(t0).
Symmetry sets total ΔS = 0, hence (∂L/∂q̇ φ) is conserved from t0 to t1.Momentum conservation's derivation from space translation symmetry and energy conservation from time translation symmetry in mechanics and physics is done by it.
#NoethersTheorem #Physics #TheoreticalPhysics #ClassicalMechanics #AnalyticalMechanics #LagrangianMechanics #Symmetry #ConservationLaws #ActionPrinciple #CalculusOfVariations #Mathematics #STEM #Science #PhysicsEducation #LearnPhysics #QuantumPhysics #FieldTheory #GeneralizedCoordinates #MomentumConservation #EnergyConservation #AngularMomentum #TheoreticalScience #PhysicsNotes #Infographic #ScienceCommunication #EducationalContent #EMNoether #MathPhysics #PhysicsStudents #STEMEducation
-
Quantum mechanics, the physical theory describing the behavior of atomic and subatomic particles, can be successfully formulated using solely real numbers. This mathematically rigorous alternative challenges the traditional reliance on complex numbers, which incorporate both real and imaginary components, to describe quantum states.
#QuantumMechanics #TheoreticalPhysics #QuantumInformationScience #sflorg
https://www.sflorg.com/2026/06/qs06222601.html -
Quantum mechanics, the physical theory describing the behavior of atomic and subatomic particles, can be successfully formulated using solely real numbers. This mathematically rigorous alternative challenges the traditional reliance on complex numbers, which incorporate both real and imaginary components, to describe quantum states.
#QuantumMechanics #TheoreticalPhysics #QuantumInformationScience #sflorg
https://www.sflorg.com/2026/06/qs06222601.html -
Light-induced quantum friction is an unexpected phenomenon in which irradiating nanoscale particles—specifically fluorescent carbon nanotubes in aqueous solutions—with visible light decelerates their movement rather than accelerating or heating them.
#PhysicalChemistry #TheoreticalPhysics #QuantumPhysics #Nanotechnology #MaterialsScience #sflorg
https://www.sflorg.com/2026/06/chm06142601.html -
Light-induced quantum friction is an unexpected phenomenon in which irradiating nanoscale particles—specifically fluorescent carbon nanotubes in aqueous solutions—with visible light decelerates their movement rather than accelerating or heating them.
#PhysicalChemistry #TheoreticalPhysics #QuantumPhysics #Nanotechnology #MaterialsScience #sflorg
https://www.sflorg.com/2026/06/chm06142601.html -
Everything's wrong! Back to the trees!
https://www.youtube.com/watch?v=kTcytKVP66k
I don't mean that remark in a derogatory way. There's definitely a lot of truth to what he says.
#science #physics #theoreticalphysics -
Everything's wrong! Back to the trees!
https://www.youtube.com/watch?v=kTcytKVP66k
I don't mean that remark in a derogatory way. There's definitely a lot of truth to what he says.
#science #physics #theoreticalphysics -
RE: https://mathstodon.xyz/@johncarlosbaez/116662332807347504
In memory of Ivan Todorov (1933–2025).
His publications:
<https://scholar.google.com/citations?user=wZiNNXoAAAAJ>
(INRNE is Institute for Nuclear Research and Nuclear Energy.)After expanding to show all 433 articles, "octonion[ic]" appears in five titles.
The most cited of the latter is a 2018 paper with Svetla Drenska,
"Octonions, exceptional Jordan algebra and the role of the group F₄ in particle physics".#Algebra
#MathematicalPhysics
#Octonions
#ParticlePhysics
#TheoreticalPhysics -
RE: https://mathstodon.xyz/@johncarlosbaez/116662332807347504
In memory of Ivan Todorov (1933–2025).
His publications:
<https://scholar.google.com/citations?user=wZiNNXoAAAAJ>
(INRNE is Institute for Nuclear Research and Nuclear Energy.)After expanding to show all 433 articles, "octonion[ic]" appears in five titles.
The most cited of the latter is a 2018 paper with Svetla Drenska,
"Octonions, exceptional Jordan algebra and the role of the group F₄ in particle physics".#Algebra
#MathematicalPhysics
#Octonions
#ParticlePhysics
#TheoreticalPhysics -
Researchers have developed an exact mathematical formula describing how arbitrarily small, microscopic black holes can spontaneously form from highly ordered, unstable states known as spacetime crystals.
#TheoreticalPhysics #Astrophysics #Cosmology #sflorg
https://www.sflorg.com/2026/05/phy05212601.html -
Researchers have developed an exact mathematical formula describing how arbitrarily small, microscopic black holes can spontaneously form from highly ordered, unstable states known as spacetime crystals.
#TheoreticalPhysics #Astrophysics #Cosmology #sflorg
https://www.sflorg.com/2026/05/phy05212601.html -
Observing and Experiencing our Own Reality:
A detailed 3D geometric model of a 600-cell tetrahedral complex. 1.) Dimensions 1D can be a line - something with length only, no width, no height, no thickness, no depth. 2D can be a square - a flat plane figure with only two measurements - length and width, no thickness, no depth. 3D can be a cube - a solid geometric figure with three spatial dimensions of length, width and height (or depth), occupying space and having volume. 4D can be a tesseract - with four spatial dimensions, […]https://aethoes.com/2026/05/14/observing-and-experiencing-our-own-reality/
-
Observing and Experiencing our Own Reality:
A detailed 3D geometric model of a 600-cell tetrahedral complex. 1.) Dimensions 1D can be a line - something with length only, no width, no height, no thickness, no depth. 2D can be a square - a flat plane figure with only two measurements - length and width, no thickness, no depth. 3D can be a cube - a solid geometric figure with three spatial dimensions of length, width and height (or depth), occupying space and having volume. 4D can be a tesseract - with four spatial dimensions, […]https://aethoes.com/2026/05/14/observing-and-experiencing-our-own-reality/
-
Researchers have developed a novel mathematical model that treats biological tissue as a fluid composed of elongated, aligned particles to explain how surrounding cellular forces influence the speed and shape of wound closure. The model demonstrates that the structural orientation of cells around a wound actively dictates healing dynamics.
#TheoreticalPhysics #AppliedMathematics #Biomechanics #Mechanobiology #sflorg
https://www.sflorg.com/2026/04/phy04272601.html -
Researchers have developed a novel mathematical model that treats biological tissue as a fluid composed of elongated, aligned particles to explain how surrounding cellular forces influence the speed and shape of wound closure. The model demonstrates that the structural orientation of cells around a wound actively dictates healing dynamics.
#TheoreticalPhysics #AppliedMathematics #Biomechanics #Mechanobiology #sflorg
https://www.sflorg.com/2026/04/phy04272601.html -
Eventually, cats will break everything #theoreticalphysics
-
Eventually, cats will break everything #theoreticalphysics
-
Postdoctoral Researcher in Gravity-Quantum Interface at Kyushu University
Kyushu UniversitySee the full job description on jobRxiv: https://jobrxiv.org/job/kyushu-university-27778-postdoctoral-researcher-in-gravity-quantum-interface-at-kyushu-university/
#AMOphysics #quantuminformation #theoreticalphysics #ScienceJobs #hiring #research
https://jobrxiv.org/job/kyushu-university-27778-postdoctoral-researcher-in-gravity-quantum-interface-at-kyushu-university/?fsp_sid=11449 -
Postdoctoral Researcher in Gravity-Quantum Interface at Kyushu University
Kyushu UniversitySee the full job description on jobRxiv: https://jobrxiv.org/job/kyushu-university-27778-postdoctoral-researcher-in-gravity-quantum-interface-at-kyushu-university/
#AMOphysics #quantuminformation #theoreticalphysics #ScienceJobs #hiring #research
https://jobrxiv.org/job/kyushu-university-27778-postdoctoral-researcher-in-gravity-quantum-interface-at-kyushu-university/?fsp_sid=11449 -
Well that takes a load of my mind - I'm glad we got to the bottom of this!
Researchers @ University of Pennsylvania have confirmed that gravity's strength weakens with distance almost exactly as predicted by the equations developed by Newton and later incorporated into Einstein's theory of general relativity. https://phys.org/news/2026-04-gravity-newton-einstein-cosmic-scales.html #Gravity #Newton #Einstein #GeneralRelativity #TheoreticalPhysics #Physics #Astrophysics #Universe #Galaxies #UniversityofPennsylvania
-
Well that takes a load of my mind - I'm glad we got to the bottom of this!
Researchers @ University of Pennsylvania have confirmed that gravity's strength weakens with distance almost exactly as predicted by the equations developed by Newton and later incorporated into Einstein's theory of general relativity. https://phys.org/news/2026-04-gravity-newton-einstein-cosmic-scales.html #Gravity #Newton #Einstein #GeneralRelativity #TheoreticalPhysics #Physics #Astrophysics #Universe #Galaxies #UniversityofPennsylvania
-
"The Blob" is a pioneering experimental setup in which a perfect, stationary ball of turbulence is generated at the center of a water tank by firing synchronized water jets. This configuration isolates the chaotic swirling of fluids from boundary interactions, allowing scientists to study turbulence in its purest, undisturbed form.
#ExperimentalPhysics #FluidDynamics #TheoreticalPhysics #Physics #sflorg
https://www.sflorg.com/2026/04/phy04132601.html -
"The Blob" is a pioneering experimental setup in which a perfect, stationary ball of turbulence is generated at the center of a water tank by firing synchronized water jets. This configuration isolates the chaotic swirling of fluids from boundary interactions, allowing scientists to study turbulence in its purest, undisturbed form.
#ExperimentalPhysics #FluidDynamics #TheoreticalPhysics #Physics #sflorg
https://www.sflorg.com/2026/04/phy04132601.html -
Just discovered a hep-th article on #arXiv that is very likely AI-generated.
The items in bibliography are basically made-up. -
Just discovered a hep-th article on #arXiv that is very likely AI-generated.
The items in bibliography are basically made-up. -
Postdoctoral Researcher in Gravity-Quantum Interface at Kyushu University
Kyushu UniversitySee the full job description on jobRxiv: https://jobrxiv.org/job/kyushu-university-27778-postdoctoral-researcher-in-gravity-quantum-interface-at-kyushu-university/
#AMOphysics #quantuminformation #theoreticalphysics #ScienceJobs #hiring #research
https://jobrxiv.org/job/kyushu-university-27778-postdoctoral-researcher-in-gravity-quantum-interface-at-kyushu-university/?fsp_sid=10057 -
Postdoctoral Researcher in Gravity-Quantum Interface at Kyushu University
Kyushu UniversitySee the full job description on jobRxiv: https://jobrxiv.org/job/kyushu-university-27778-postdoctoral-researcher-in-gravity-quantum-interface-at-kyushu-university/
#AMOphysics #quantuminformation #theoreticalphysics #ScienceJobs #hiring #research
https://jobrxiv.org/job/kyushu-university-27778-postdoctoral-researcher-in-gravity-quantum-interface-at-kyushu-university/?fsp_sid=10057 -
Extending single-minus amplitudes to gravitons
https://openai.com/index/extending-single-minus-amplitudes-to-gravitons/
#HackerNews #ExtendingSingleMinusAmplitudes #Gravitons #QuantumPhysics #TheoreticalPhysics #Research #ScienceNews
-
Extending single-minus amplitudes to gravitons
https://openai.com/index/extending-single-minus-amplitudes-to-gravitons/
#HackerNews #ExtendingSingleMinusAmplitudes #Gravitons #QuantumPhysics #TheoreticalPhysics #Research #ScienceNews
-
Weekly thought: How universes may begin
In Bubbleverse, universes don’t start with a Big Bang.
They emerge when physical thresholds are crossed.
Energy accumulates in a real void.
At a critical point, spacetime activates.
Expansion follows — no inflation, no fine-tuning.
The question shifts from
“What exploded?”
to
“What conditions were met?”
Less magic. More mechanism.
🔗 https://bubbleverse.dk
#Cosmology #Bubbleverse #TheoreticalPhysics #NoBigBang -
1/n Notes on #UAP Discussions : It will always be challenging to tie ideas in advanced #TheoreticalPhysics and #Cosmology to UAP observables in a way the general public understands. When we start at an applied level by asking questions about how something we can observe but don’t understand works…well that sometimes requires a reset in thinking even by the folks doing the advanced work. If we surmise…
Inflation assumes vacuum energy couples to gravity…but it doesn’t
https://youtu.be/hufUGc0vY2w?si=zm2JrdBWTHvu1wWU -
Time isn’t universal.
In the Bubbleverse framework, time is activated.
Inside a universe, it runs fast and physics unfolds.
Outside, in the void, time is almost frozen — but not zero.
That single difference explains: • universe lifetimes
• late-time acceleration
• cosmic foam structure
• energy drift without dark energy
Mechanics, not metaphysics.
Read the full article:
https://bubbleverse.medium.com/parametric-time-why-the-universe-runs-faster-than-the-void-42f64594197a
#cosmology #theoreticalphysics #Bubbleverse #science #fediverse -
🎉✨Breaking news: String Theory finally manages to describe a universe with dark energy—because regular energy was just too mainstream! 🌌😜 Who knew a cocktail of buzzwords could make theoretical physics sound like a cosmic smoothie? 🚀🥤
https://www.quantamagazine.org/string-theory-can-now-describe-a-universe-that-has-dark-energy-20260114/ #StringTheory #DarkEnergy #TheoreticalPhysics #CosmicSmoothie #ScienceNews #HackerNews #ngated -
Mass isn't fundamental - it's momentum you can't see in a fifth dimension.
New paper: particles are massless 5D objects. Mass = ℏk_W/c (momentum along W-axis).
Time dilation? Reduced W-oscillation when 3D velocity increases.
Entanglement? Particle-antiparticle pairs are opposite ends of a single 5D spinor.
E² = p²c² + m²c⁴ emerges automatically.
🔗 https://zenodo.org/records/17922219
#physics #QuantumMechanics #SpecialRelativity #TheoreticalPhysics #openscience #preprint
