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
Graduate Virial theorem and translational invariance
- gjk
- · Replies 2 ·
Undergrad Why must the variation be small in the Euler-Lagrange equation?
- Reuben_Leib
- · Replies 5 ·
Undergrad Why does ##u## need to be small to represent the Taylor expansion
- Reuben_Leib
- · Replies 3 ·
Undergrad Modified Newtonian Dynamics + dark matter sterile neutrinos or PBH?
- kodama
- · Replies 7 ·
Graduate Covariant derivative of Weyl spinor
- Baela
- · Replies 3 ·
Graduate Finding a suitable form factor for a given set of conditions
- codebpr
- · Replies 1 ·
Undergrad Is Information a conserved quantity or not?
- Pythagorean
- · Replies 3 ·
Undergrad Mercury as a plasma at 150 Kelvin
- gary808
- · Replies 5 ·
Undergrad Understanding Physical Processes: EM, Gravitational, Mechanical & Entropic
- Hallucinogen
- · Replies 1 ·
Undergrad Spin networks: what exactly is a trivalent node?
- Heidi
- · Replies 1 ·
Undergrad Zero-Point Energy and Gravitational Influence
- frankinstien
- · Replies 14 ·
Undergrad What is time in string/M-theory and Four-dimensionalism?
- kodama
- · Replies 1 ·
Undergrad Theoretical pressure decay of a pressurised vessel
- DSOTM
- · Replies 11 ·
Undergrad What Does Falsifiability Mean in the Context of Science?
- Chenkel
- · Replies 26 ·
Undergrad I made an N-body simulation program
- Random Physics Fan
- · Replies 2 ·
High School Shouldn't quantum gravity be an interaction between mass and spacetime?
- TerranIV
- · Replies 40 ·
Graduate What could a reversal of UV-IR imply?
- lwjjack
- · Replies 1 ·
Graduate UV-IR correspondence in AdS-CFT and non-AdS theories
- lwjjack
- · Replies 1 ·
Undergrad Momentum and Action: Understanding Lagrangian Mechanics
- happyparticle
- · Replies 5 ·
Graduate Stretching Coordinates System/Reductive perturbation theory
- Ahmer ali
- · Replies 2 ·
Undergrad Canonical quantization of Ashtekar's new variables
- kodama
- · Replies 2 ·
Graduate Do two distant small masses orbit faster in MOND than in Newtonian dynamics?
- accdd
- · Replies 22 ·
Undergrad What is the significance of the T - V Lagrangian of a system?
- James1238765
- · Replies 30 ·
Graduate Where Can I Find Up-to-Date Resources for Studying MOND Theory?
- accdd
- · Replies 1 ·
Graduate Could a CPL parametrization be included into Brans-Dicke model?
- fab13
- · Replies 2 ·
Undergrad At which point is gravity inconsistent with quantum mechanics?
- Gerenuk
- · Replies 24 ·
Graduate What does Rovelli mean with "oriented and ordered graph"?
- Heidi
- · Replies 4 ·
Graduate Inference from fine-tuning to a multiverse
- haushofer
- · Replies 5 ·
Undergrad Does Superfluid Dark Matter provide a successful explanation for MOND?
- haushofer
- · Replies 13 ·
Undergrad Is Connes' Model of the Higgs Field a Wormhole?
- arivero
- · Replies 5 ·
Graduate What do you think of this definition of Spin Networks?
- Heidi
- · Replies 2 ·
Graduate Solving this non-holonomic system using Dirac-Bergmann theory
- andresB
- · Replies 4 ·
Undergrad How do I check if the canonical angular momentum is conserved?
- phos19
- · Replies 4 ·
Undergrad SO(3) -- What is the advantage of knowing something is in a group?
- Trying2Learn
- · Replies 8 ·
Undergrad The Possibility of Faster-Than-Light Communication?
- TerranIV
- · Replies 44 ·
Undergrad Comparison of Deur's universe vs. L-CDM
- timmdeeg
- · Replies 3 ·
Graduate The kinetic term of the Hamiltonian is not positive definite
- codebpr
- · Replies 3 ·
Graduate Why parameterise the Nambu-Goto string world-sheet by proper time
- wam_mi
- · Replies 5 ·
Graduate Finding paper on loops in oriented spinfoams
- Heidi
- · Replies 11 ·
Undergrad MOND from MacDowell-Mansouri geometrical formulation
- kodama
- · Replies 19 ·
Undergrad Primordial neutron star -- a new candidate for dark matter
- kodama
- · Replies 3 ·
Graduate Why are Euler's angles picked exactly that way?
- illidan4426
- · Replies 1 ·
Graduate Double copies and the black hole electron
- mitchell porter
- · Replies 7 ·
High School How many electrons to make a stable gravitational object?
- Feynstein100
- · Replies 5 ·
Undergrad Trouble for physical collapse models?
- atyy
- · Replies 3 ·
Graduate Does the theory of information have anything to offer for physics?
- SVN
- · Replies 2 ·
Graduate Current status of Tom Banks' Holographic space time?
- AAAdrian
- · Replies 2 ·
Undergrad The logical impossibility of proving that indeterminism is true?
- tade
- · Replies 1 ·
High School Why is Maldacena's paper published in two journals?
- Demystifier
- · Replies 12 ·
High School Tangran, Inertial Mass and Gravitational Mass
- dom_quixote
- · Replies 8 ·
Graduate Spectrum of the Liouville Operator
- andresB
- · Replies 2 ·
Graduate How do we derive the number of string excitation modes for large N?
- Eugene Chen
- · Replies 1 ·
Undergrad New anomaly observed in 12C X17
- kodama
- · Replies 16 ·
Undergrad Hamilton's Principle (HP), Lagrangian
- Trying2Learn
- · Replies 20 ·
Graduate Contravariance, Covariance, stress and position vector
- Trying2Learn
- · Replies 24 ·
Undergrad Multiple (Non-Interacting) Universes?
- Suekdccia
- · Replies 11 ·
High School Could electrons and photons be made of smaller fundamental particles?
- nescient
- · Replies 15 ·
Graduate A Proposed Black Hole Entropy Calculation
- PeterDonis
- · Replies 21 ·
High School Can we detect a 4D universe containing our 3D one?
- KiloTango
- · Replies 10 ·
Graduate Independence of generalized coordinates and generalized velocities
- VVS2000
- · Replies 5 ·
Graduate Deriving dilaton monopole interaction in Gibbons-Maeda formalism
- user1139
- · Replies 3 ·
Undergrad Is "nondimensionalization" a misnomer?
- Grefus
- · Replies 19 ·
Undergrad How can energy eigenstates be different if all fast variables are in their ground state?
- asimov42
- · Replies 1 ·
Graduate Subjectively deterministic-looking features of scatter plots
- Swamp Thing
- · Replies 2 ·
Graduate The force from the energy gradient
- user1139
- · Replies 1 ·
High School What if there are infinite theories of everything?
- fractalzen
- · Replies 3 ·
Graduate How are the intertwiners related to Schur's lemma?
- Heidi
- · Replies 23 ·
Undergrad Graviweak Unification and Coleman-Mandula theorem
- kodama
- · Replies 7 ·
Undergrad Carlo Rovelli, loop quantum gravity and point particles
- TheHeraclitus
- · Replies 4 ·
Graduate Non-unitary gauge transformation
- DuckAmuck
- · Replies 3 ·
High School What if we cut out the Big Bang and inflation?
- Cody Livengood
- · Replies 20 ·
Undergrad Noncommutative geometry and asymptotic safe gravity and MOND
- kodama
- · Replies 3 ·
Undergrad Trying To Conceptualize Two Dimensions Of Time
- ohwilleke
- · Replies 2 ·
Undergrad Can Core Theory Be Derived From Nine Lines?
- ohwilleke
- · Replies 6 ·
Graduate Loop quantum gravity and General relativity
- Heidi
- · Replies 9 ·
Undergrad Can AI discover alternate physics from the double pendulum?
- Joseph M. Zias
- · Replies 2 ·
Undergrad Laplace equation with irregular boundaries
- physwiz222
- · Replies 4 ·
Undergrad Is the Continuum Limit of Spin Foam Dynamics Equivalent to Massless Gravitons?
- ohwilleke
- · Replies 2 ·
Undergrad Axion Mass Acquisition: Do Axions Acquire Mass?
- Ranku
- · Replies 7 ·
Undergrad Has anyone done a PPN formalism on Dark Matter? Or other non-GR?
- mollwollfumble
- · Replies 4 ·
Graduate Three generations of Fermions from octonions Clifford alegbras
- kodama
- · Replies 61 ·
Undergrad Does field coupling strength determine particle speed and mass?
- Stevexyz
- · Replies 16 ·
Undergrad Current theory of composite quarks and leptons
- LCSphysicist
- · Replies 6 ·
Undergrad The different generators of canonical transformations
- andresB
- · Replies 3 ·
Undergrad Gravitational potential of an ellipsoid
- ergospherical
- · Replies 3 ·
Undergrad Hamiltonian formalism and partition function
- Simobartz
- · Replies 1 ·
Undergrad Would infinite entropy break all symmetries?
- Suekdccia
- · Replies 3 ·
Undergrad Designing an Invariant Lagrangian: Rules and Considerations
- accdd
- · Replies 2 ·
Undergrad Can Shape Dynamics Be Tested Against Quantum Mechanics?
- lindberg
- · Replies 3 ·
Graduate Why do we need a quantum correction for black hole entropy?
- somok
- · Replies 9 ·
High School Algebraic Operations on Energy-Momentum Relationships
- alan123hk
- · Replies 3 ·
Undergrad Can all fields be components of a single unified field?
- Delta2
- · Replies 6 ·
Undergrad Could the Lorentz symmetry be theoretically broken in vacuum?
- Suekdccia
- · Replies 3 ·
Graduate Why Can't We Detect Cosmic Rays Beyond the GZK Limit?
- Zuzana
- · Replies 3 ·
Undergrad Alternative ways to quantize Ashtekar variables
- kodama
- · Replies 2 ·
Graduate Cross section-temperature equivalence
- karmion
- · Replies 2 ·
Graduate Vacuum Transitions and Lorentz Symmetry Breaking
- Suekdccia
- · Replies 8 ·
Graduate Roughly how many people in this world actually know about string theory?
- alan123hk
- · Replies 10 ·
Undergrad Davis-Onoochin critique of conventional field momentum interpretation
- coquelicot
- · Replies 12 ·
Undergrad Higher Dimensional Time Implications?
- LightningInAJar
- · Replies 8 ·