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
High School What's the distance metric for a compactified dimension?
- Paige_Turner
- · Replies 14 ·
Undergrad References for Hamiltonian field theory and Dirac Brackets
- andresB
- · Replies 1 ·
Graduate How can modular forms be used in particle physics mass models?
- mitchell porter
- · Replies 7 ·
High School GR and closeness to a black hole singularity
- Randy Subers
- · Replies 1 ·
Graduate MOND theory research program and alternatives to dark matter
- mitchell porter
- · Replies 11 ·
Graduate Wiesendanger's quantization of an SO(1,3) extension of GR
- dextercioby
- · Replies 2 ·
Undergrad Are all symmetries in physics just approximations?
- kmm
- · Replies 11 ·
Undergrad Can the Principle of Least Action Unify Different Branches of Physics?
- Delta2
- · Replies 5 ·
Graduate What does the equation C = 12 J mean for black holes?
- joemorin
- · Replies 29 ·
Graduate Noether's theorem for finite Hamiltonian systems
- thaalves
- · Replies 3 ·
Graduate What does k represent in the amplituhedron equation Y = CZ^T?
- nrqed
- · Replies 3 ·
High School Supersymetry versus Anti Particles?
- shrey07
- · Replies 4 ·
Graduate The equations of variable mass systems
- wrobel
- · Replies 4 ·
Graduate Proof of Classical Fluctuation-Dissipation Theorem
- Twigg
- · Replies 1 ·
Graduate The long awaited F theory book finally set out
- MathematicalPhysicist
- · Replies 10 ·
High School Could multiple time dimensions allow time travel or interdimensional travel?
- Diego Josephia
- · Replies 4 ·
Graduate Nobel laureates supporting string theory?
- Suekdccia
- · Replies 2 ·
Undergrad Mass spectrum of open bosonic strings
- snypehype46
- · Replies 3 ·
Undergrad The Simulation Theory and the dangers of pop-science
- JamieSalaor
- · Replies 56 ·
Graduate Defining the stress tensor
- wrobel
- · Replies 19 ·
Graduate Higher-dimensional routes to Standard Model bosons and fermions
- mitchell porter
- · Replies 4 ·
Undergrad M-theory and Calabi-Yau compactifications
- dx
- · Replies 40 ·
Graduate BRST operator Q in string theory and string field theory
- dx
- · Replies 1 ·
Graduate Is the Rotating Lepton Model a Valid Approach to Hadron Masses?
- PeterDonis
- · Replies 15 ·
Graduate Just standard model and gravity, up to high energies? An update
- mitchell porter
- · Replies 4 ·
Graduate Mass in motivic quantum gravity
- mitchell porter
- · Replies 2 ·
Undergrad Is gravity action at a distance or is it a local force?
- KurtLudwig
- · Replies 16 ·
Undergrad Which Textbook References Hamiltonian Systems with Equal Orbit Periods?
- wrobel
- · Replies 10 ·
Graduate How to Find Authors' Emails for SU(N) Gauge Theory Paper?
- MathematicalPhysicist
- · Replies 12 ·
Graduate Why Is AdS Space Ideal for Formulating String Theory and Holography?
- dx
- · Replies 0 ·
Undergrad Calculations to prove the non-Euclidean nature of 3-D space
- KedarMhaswade
- · Replies 5 ·
Graduate US Muon-g2 experiment - reading recommendations
- Milsomonk
- · Replies 3 ·
Graduate Octonions and the Standard Model
- john baez
- · Replies 27 ·
Undergrad Basics on types of matter and energy
- trees and plants
- · Replies 8 ·
Undergrad Are There Antimatter Counterparts to Susy Sparticles in Supersymmetry?
- ggitt
- · Replies 1 ·
Undergrad Polarization mode symmetries of massless particles
- lomidrevo
- · Replies 1 ·
Graduate Is supersymmetry a fundamental principle or just a bookkeeping device?
- dx
- · Replies 12 ·
Undergrad Momentum cutoff, Lorentz violation and the vacuum state
- asimov42
- · Replies 7 ·
Undergrad Latest Tau Lepton Measurement Consistent With Koide's Rule
- ohwilleke
- · Replies 12 ·
Undergrad The Ultimate Symmetry of a Mirror Universe
- Quarker
- · Replies 3 ·
Graduate Lagrange with Higher Derivatives (Ostrogradsky instability)
- Arman777
- · Replies 3 ·
Graduate Probing Dark Matter Physics: What Properties Can We Derive?
- Floyd_13
- · Replies 5 ·
High School Is there a formula to obtain the mass of a proton from c?
- TarbalTheLabRat
- · Replies 10 ·
Undergrad Euler, Calculus of Variations and Mast on a ship
- Trying2Learn
- · Replies 4 ·
Graduate Thought Experiment: Aether Medium
- libertyk
- · Replies 6 ·
Graduate How Would MOND Solve the Dark Matter Problem and Affect Quantum Gravity?
- andresB
- · Replies 4 ·
High School Is The Planck Length the smallest length possible?
- VictorMedvil
- · Replies 12 ·
Graduate Is this solution for interstellar travel viable?
- member 641893
- · Replies 3 ·
Graduate What are the recent advancements in quantum gravity?
- ProtonNeutron
- · Replies 7 ·
Undergrad What experiments falsify loop quantum gravity?
- Paul159
- · Replies 5 ·
Undergrad Are Supersymmetry Sparticles Paired with Antimatter Counterparts?
- ggitt
- · Replies 2 ·
Graduate The Langlands program and its connection to physics
- dx
- · Replies 8 ·
High School The building blocks of strings
- Sophrosyne
- · Replies 5 ·
High School Do Quantum Strings Define the Strength of Our Universe's Fabric?
- CallMeDirac
- · Replies 7 ·
Undergrad Why do representations label the edges in LQG?
- Heidi
- · Replies 8 ·
Undergrad Are there other renowned physicists who believe in evolving laws of physics?
- Suekdccia
- · Replies 2 ·
Undergrad Theoretical bounds on dark matter masses
- fresh_42
- · Replies 1 ·
Undergrad Brane cosmology without string theory?
- Suekdccia
- · Replies 1 ·
Graduate Strand conjecture published with testable predictions
- physics8553
- · Replies 3 ·
Undergrad Converting Levi-Civita expression with current distribution to vector form
- user1139
- · Replies 1 ·
High School Problems on the making of a quantum gravity theory
- trees and plants
- · Replies 9 ·
High School Is There a Cosmological Model That Considers All Possible Laws of Physics?
- Suekdccia
- · Replies 1 ·
Undergrad On spherical geometry and its applications in physics
- trees and plants
- · Replies 2 ·
Undergrad What is a good formula for the Laplace operator?
- George Keeling
- · Replies 22 ·
Undergrad Kaluza-Klein Theory and 5D Einstein Equations
- jake jot
- · Replies 5 ·
Undergrad Which physical quantities are invariant versus variant across reference frames?
- fog37
- · Replies 10 ·
High School Change of variables in Hannay angle proof with action-angle coordinates
- etotheipi
- · Replies 11 ·
Graduate Strand model describing particles as rational tangles published
- physics8553
- · Replies 41 ·
Undergrad General Relativistic Quantum Theory?
- jake jot
- · Replies 71 ·
Graduate Can operator theory model spacetime in quantum gravity?
- Physics4Funn
- · Replies 2 ·
Graduate How does LQG describe gravity?
- Heidi
- · Replies 4 ·
Undergrad Models and theories of laws of physics emerging from chaos?
- Suekdccia
- · Replies 1 ·
Undergrad Why are some theories in physics falsifiable?
- trees and plants
- · Replies 12 ·
Graduate String Theory in N dimensions?
- Suekdccia
- · Replies 1 ·
High School The relativistic uncertainty principle
- bayakiv
- · Replies 5 ·
Undergrad Physicists who propose that symmetries are emergent?
- Suekdccia
- · Replies 73 ·
Graduate Holographic principle (I'm looking for a paper that I read)
- Heidi
- · Replies 8 ·
Graduate Parametric Lagrangian is a Homogeneous Form in Parametric Velocities?
- Wizard
- · Replies 1 ·
High School Can Classical Physics Transform into Quantum Physics in Modified Space-Time?
- bayakiv
- · Replies 8 ·
Undergrad Constrains on experimental space and parameters
- jake jot
- · Replies 4 ·
Graduate What is the significance of the Cabibbo Angle Anomaly in particle physics?
- mitchell porter
- · Replies 4 ·
Graduate What happens after a theory of quantum gravity is found?
- trees and plants
- · Replies 6 ·
Undergrad Einstein's purely algebraic physics and "my entire castle in the air"
- jake jot
- · Replies 5 ·
Graduate Will QG leave GR unchanged or QT?
- Sunil
- · Replies 60 ·
Undergrad Evidence of Strong Equivalence Principle Violations?
- ohwilleke
- · Replies 3 ·
Undergrad Symmetry and Finite Coupled Oscillators
- Ibraheem
- · Replies 1 ·
Graduate New ideas about symmetry groups
- mitchell porter
- · Replies 1 ·
High School Variation of the Lagrangian in Noether theorem derivation
- etotheipi
- · Replies 7 ·
Undergrad Why is action considered a scalar in physics?
- Adams2020
- · Replies 8 ·
High School Theory of Loop Quantum Gravity
- Lutz-F
- · Replies 4 ·
Undergrad Photon behaviour across EH threshold
- MSC93
- · Replies 1 ·
Graduate Can Data Travel Faster Than Light Computation?
- Gary101
- · Replies 14 ·
High School Black Hole singularities in Quantum Gravity
- Intrastellar
- · Replies 5 ·
High School Size of strings in string theory
- Ans
- · Replies 11 ·
Graduate How Does Noether's Theorem Extend Beyond Conservation in Hamiltonian Systems?
- wrobel
- · Replies 7 ·
Undergrad What conservation law follows from Noether's theorem applied to time rotations?
- Marty4691
- · Replies 19 ·
High School Is the Concept of Vacuum in Physics Truly Lorentz Invariant?
- jake jot
- · Replies 3 ·
Undergrad Varying dimensional universal constants
- Pnin
- · Replies 9 ·
Undergrad If there are 10^500 solutions to $ Theory, doesn't that make it bunk?
- swampwiz
- · Replies 4 ·
Graduate Ads/cft correspondence and quantum / classical correspondance
- Heidi
- · Replies 18 ·