Join expert and advanced topics on beyond the standard model of physics. This includes professionally researched theories like strings, branes, and LQG. Mainstream physics only.
Threads
Undergrad Lagrangian density of a linearly elastic string under gravity
- pines-demon
- · Replies 6 ·
Graduate Continuity of a quantity in a conical system to determine the velocity
- tworitdash
- · Replies 0 ·
Undergrad Physics equations with the mathematical constant Phi?
- ole cram
- · Replies 4 ·
Undergrad Expanding around 0 for multipole expansion
- deuteron
- · Replies 4 ·
Undergrad What does "transforms covariantly" mean here?
- Hill
- · Replies 4 ·
High School What is the physical significance of mass-time-length equivalences in physics?
- mister i
- · Replies 8 ·
Undergrad Anomalous contribution to galactic rotation curves due to stochastic s
- kodama
- · Replies 2 ·
Graduate Basic Scheme and Fundamental Equations of String Theory
- masteralien
- · Replies 26 ·
High School What is currently known about fields other than gravitation?
- mister i
- · Replies 11 ·
Undergrad Gravitation In Higher Dimensions
- Hornbein
- · Replies 2 ·
Graduate Majorana mass term for the electron
- zaman786
- · Replies 16 ·
High School Vibration Patterns of Strings within Quarks?
- Hatem
- · Replies 1 ·
Undergrad Why are nontrivial loops unavoidable in mathematical models of classical 3D rotations?
- DanCoimbra
- · Replies 6 ·
Graduate Generalizing Einstein field equations for von Neumann W* algebras with fractal dimensions
- Tommolo
- · Replies 20 ·
High School String theory suggests that dark matter is hiding in extra dimension
- pines-demon
- · Replies 10 ·
Graduate Tully-Fisher law from modified Kepler symmetries
- mitchell porter
- · Replies 11 ·
Undergrad Observation of structures at ∼17 and ∼38 MeV/c2 in the γγ invariant mass spectra
- kodama
- · Replies 10 ·
Graduate Does attraction vs repulsion depend on graviton spin?
- Heidi
- · Replies 15 ·
Graduate The no boundary proposal and quantum gravity
- Morbert
- · Replies 7 ·
Undergrad Does the graviton have to exist?
- Jim Kata
- · Replies 6 ·
Graduate Chae Binaries Paper Published + Rebuttal of Banik + OSMU Talk
- strangerep
- · Replies 18 ·
Graduate Does the Universe have a finite number of fundamentals to uncover?
- Maximum7
- · Replies 9 ·
Graduate Has this experiment of "detecting" the quantum foam been conducted?
- DyerMaker
- · Replies 5 ·
Undergrad How did Hamilton derive the characteristic function V in his essay?
- selim
- · Replies 3 ·
Undergrad Is the Near Integer Muon to Electron Mass Ratio a Coincidence or Significant?
- Jonathan Scott
- · Replies 7 ·
Graduate Is Doubly Special Relativity Connected to Variable Light Speed?
- jjzeidner
- · Replies 14 ·
Undergrad Taylor expansion about lagrangian in noether
- gionole
- · Replies 1 ·
Undergrad Do scientific measurements need real numbers or just rationals?
- Dale
- · Replies 85 ·
Undergrad Integrity of matter / space and time
- tuneksan
- · Replies 13 ·
Undergrad Sign of the spatial part of the J.J interaction
- gernos
- · Replies 0 ·
Undergrad Mond - gravity as two separate forces?
- Fred Blame
- · Replies 12 ·
Graduate Milgrom's constant and challenges to dark matter
- strangerep
- · Replies 12 ·
Undergrad Atmospheric Density vs Altitude in an O'Neil Cylinder
- MattRob
- · Replies 1 ·
Graduate Can the Strand Tangle Model Unify General Relativity and the Standard Model?
- physics8553
- · Replies 5 ·
Undergrad Are non-perturbative methods in physics limited to quantum physics?
- ohwilleke
- · Replies 4 ·
Undergrad Active transformation use-case in homogeneity
- gionole
- · Replies 13 ·
Graduate How was this infinite sequence of numbers found? (non-commutative geometry )
- Heidi
- · Replies 4 ·
Undergrad Restoring S.I. units to a Lagrangian in natural units
- Precious Adegbite
- · Replies 1 ·
Undergrad Is loop quantum gravity dual to CFT?
- kodama
- · Replies 13 ·
Undergrad Transformations for isotropy in terms of math
- gionole
- · Replies 1 ·
Undergrad Coordinate transformation for isotropy
- gionole
- · Replies 7 ·
Undergrad About the use of nominal definitions in physics
- cianfa72
- · Replies 28 ·
Graduate Are there any theorems restricting possible QG candidates?
- Kontilera
- · Replies 1 ·
Undergrad Three questions regarding QG theories
- Kontilera
- · Replies 12 ·
Graduate Dark Matter as Superfluid (Khoury)
- haushofer
- · Replies 8 ·
Undergrad Questions about deriving generic equations/laws from specific equations/laws
- Hallucinogen
- · Replies 0 ·
Undergrad Existential problem on Electromagnetism and the combination of Relativity and Quantum Mechanics
- Hak
- · Replies 8 ·
Graduate Lagrangian: kinetic matrix Z_ij and mass matrix k_ij
- GGGGc
- · Replies 1 ·
Undergrad Looking for a unified expression for energy in rotating systems
- GeneralJez
- · Replies 1 ·
High School Proof of the relation between antenna aperture and gain
- alan123hk
- · Replies 14 ·
Undergrad PADME latest Oct 2, 2023 paper, searching for X17 particle
- kodama
- · Replies 11 ·
Graduate Upper indices and lower indices in Einstein notation
- GGGGc
- · Replies 5 ·
Undergrad Questions about submitting papers for peer review
- Enos
- · Replies 32 ·
Graduate Inquiry Regarding Concept in Time and Celestial Motion
- RBP3
- · Replies 2 ·
Undergrad What if unification does not work?
- Randy Subers
- · Replies 28 ·
High School Prediction of McGaugh verified?
- Structure seeker
- · Replies 1 ·
Graduate "Monstrous Higgs and Leech Spacetime"
- mitchell porter
- · Replies 0 ·
Undergrad What is the distinction between invariance and covariance?
- QuarkMaster
- · Replies 10 ·
Graduate Is it possible to obtain excess energy from a Townsend discharge?
- environes
- · Replies 6 ·
Undergrad Alternatives to the Lagrangian?
- Feynstein100
- · Replies 17 ·
Undergrad Open problems in nonlinear dynamics and Chaos
- V9999
- · Replies 1 ·
High School Why doesn't Euler's formula directly give numerical values for cos and sin?
- jaydnul
- · Replies 3 ·
High School Balancing theories and empirical data, especially concerning string theory
- jaketodd
- · Replies 47 ·
Undergrad What is the Limiting Mass at the Final Stages of Black Hole Evaporation?
- dsaun777
- · Replies 9 ·
Undergrad New Preprint on Wide Binaries Supports MOND
- ohwilleke
- · Replies 14 ·
Undergrad Lagrangian total time derivative for the velocity
- gionole
- · Replies 21 ·
Undergrad Landau's inertial frame logic
- gionole
- · Replies 1 ·
Undergrad Requirement of Holonomic Constraints for Deriving Lagrange Equations
- deuteron
- · Replies 1 ·
High School Time travel via many-worlds interpretation and universe branching
- Physics_is_beautiful
- · Replies 8 ·
Graduate Can a single constraint on three fields generate infinitely many gauge transformations?
- Baela
- · Replies 12 ·
Undergrad Having trouble understanding Tensor Contraction
- paperplane
- · Replies 14 ·
Undergrad How experimentally robust is Giant Dipole Resonance in 88Be?
- kodama
- · Replies 4 ·
Graduate F.E.M and Hamilton's Principle (converting differential equations into integral equations)
- Trying2Learn
- · Replies 1 ·
Undergrad All possible QFTs from geometry?
- Suekdccia
- · Replies 3 ·
High School What are complex numbers good for?
- lukephysics
- · Replies 13 ·
Undergrad Lagrangian doesn't change when adding total time derivative
- gionole
- · Replies 19 ·
Graduate Vector spherical harmonics in multipole expansion of vector potential
- kelly0303
- · Replies 4 ·
Graduate If the solution of a field vanishes on-shell does it mean anything?
- Baela
- · Replies 1 ·
Undergrad Does the Hamilton-Jacobi equation exist for chaotic systems?
- andresB
- · Replies 4 ·
Graduate Can position and velocity vary independently in Hamilton's Principle?
- Trying2Learn
- · Replies 2 ·
Undergrad How Does Landau Justify the Additivity of Lagrangians in Isolated Systems?
- gionole
- · Replies 9 ·
Undergrad Status and Prospects of PADME Run 3
- kodama
- · Replies 10 ·
Undergrad Ads/CFT and Ashtekar variables or spinfoam
- kodama
- · Replies 7 ·
Undergrad Does mass conservation correspond to a pseudo-symmetry?
- Feynstein100
- · Replies 6 ·
Graduate Vavryčuk's conformal FLRW metric as an alternative to dark energy and dark matter
- member 673059
- · Replies 8 ·
Undergrad BRST quantization of Ashtekar variables
- kodama
- · Replies 6 ·
High School What is string theory and why was it developed?
- Physics_is_beautiful
- · Replies 10 ·
Graduate NANOGrav waves support string theory?
- apostolosdt
- · Replies 2 ·
Undergrad Can Inhomogeneities in the Higgs Field Accelerate Galaxy Formation?
- nnunn
- · Replies 11 ·
Graduate Can Non-Commutative Geometry Describe Gluons?
- casparov
- · Replies 42 ·
Graduate Thermodynamics/gravity/CFT correspondence
- Demystifier
- · Replies 8 ·
Undergrad What maps are considered in the Polyakov path integral?
- GeniVasc
- · Replies 0 ·
Graduate Modified Gravity against Dark Matter
- Floyd_13
- · Replies 5 ·
Graduate What does it mean when the eom of a field is trivially satisfied?
- Baela
- · Replies 4 ·
Undergrad Proving that the Lagrangian of a free particle is independent of q
- okaythanksbud
- · Replies 1 ·
Undergrad Can Superstring Theory Ever Be Refuted or Confirmed?
- Unique_Engineer
- · Replies 24 ·
Undergrad Deur Gravitational self-interaction Doesn't Explain Galaxy Rotation Curves
- kodama
- · Replies 72 ·
High School What Principles Govern the Emergence of Spacetime According to Renate Loll?
- atyy
- · Replies 2 ·
Undergrad Why isn't the Lagrangian invariant under ##\theta## rotations?
- PhysicsRock
- · Replies 5 ·
Graduate H-Theorem and Lagrange multipliers
- VVS2000
- · Replies 7 ·