Beyond the Standard Models Forum

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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.
Undergrad Help with Euler Lagrange equations: neighboring curves of the extremum
  • Reuben_Leib
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Undergrad Why does ##u## need to be small to represent the Taylor expansion
  • Reuben_Leib
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Undergrad Modified Newtonian Dynamics + dark matter sterile neutrinos or PBH?
  • kodama
  • · Replies 7 ·
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Graduate Covariant derivative of Weyl spinor
  • Baela
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Graduate Finding a suitable form factor for a given set of conditions
  • codebpr
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Undergrad Is Information a conserved quantity or not?
  • Pythagorean
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Undergrad Mercury as a plasma at 150 Kelvin
  • gary808
  • · Replies 5 ·
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Undergrad Understanding Physical Processes: EM, Gravitational, Mechanical & Entropic
  • Hallucinogen
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Undergrad Spin networks: what exactly is a trivalent node?
  • Heidi
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Undergrad Zero-Point Energy and Gravitational Influence
  • frankinstien
  • · Replies 14 ·
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Undergrad What is time in string/M-theory and Four-dimensionalism?
  • kodama
  • · Replies 1 ·
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Undergrad Theoretical pressure decay of a pressurised vessel
  • DSOTM
  • · Replies 11 ·
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Undergrad What Does Falsifiability Mean in the Context of Science?
  • Chenkel
  • · Replies 26 ·
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Undergrad I made an N-body simulation program
  • Random Physics Fan
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High School Shouldn't quantum gravity be an interaction between mass and spacetime?
  • TerranIV
  • · Replies 40 ·
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Graduate What could a reversal of UV-IR imply?
  • lwjjack
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Graduate UV-IR Corresp: AdS-CFT & Non-AdS Differences
  • lwjjack
  • · Replies 1 ·
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Undergrad Momentum and Action: Understanding Lagrangian Mechanics
  • happyparticle
  • · Replies 5 ·
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Graduate Stretching Coordinates System/Reductive perturbation theory
  • Ahmer ali
  • · Replies 2 ·
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Undergrad Canonical quantization of Ashtekar's new variables
  • kodama
  • · Replies 2 ·
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Graduate MOND: Two Small Masses at Great Distance - Orbit Speed
  • accdd
  • · Replies 22 ·
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Undergrad What is the significance of the T - V Lagrangian of a system?
  • James1238765
  • · Replies 30 ·
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Graduate Where Can I Find Up-to-Date Resources for Studying MOND Theory?
  • accdd
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Graduate Could a CPL parametrization be included into Brans-Dicke model?
  • fab13
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Undergrad At which point is gravity inconsistent with quantum mechanics?
  • Gerenuk
  • · Replies 24 ·
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Graduate What does Rovelli mean with "oriented and ordered graph"?
  • Heidi
  • · Replies 4 ·
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Graduate Inference from fine-tuning to a multiverse
  • haushofer
  • · Replies 5 ·
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Undergrad Does Superfluid Dark Matter provide a successful explanation for MOND?
  • haushofer
  • · Replies 13 ·
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Undergrad Is Connes' Model of the Higgs Field a Wormhole?
  • arivero
  • · Replies 5 ·
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Graduate What do you think of this definition of Spin Networks?
  • Heidi
  • · Replies 2 ·
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Graduate Solving this non-holonomic system using Dirac-Bergmann theory
  • andresB
  • · Replies 4 ·
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Undergrad How do I check if the canonical angular momentum is conserved?
  • phos19
  • · Replies 4 ·
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Undergrad SO(3) -- What is the advantage of knowing something is in a group?
  • Trying2Learn
  • · Replies 8 ·
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Undergrad The Possibility of Faster-Than-Light Communication?
  • TerranIV
  • · Replies 44 ·
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Undergrad Comparison of Deur's universe vs. L-CDM
  • timmdeeg
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Graduate The kinetic term of the Hamiltonian is not positive definite
  • codebpr
  • · Replies 3 ·
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Graduate The Nambu-Goto Action - Questions & Answers
  • wam_mi
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Graduate Retrieving the loops on spinfoams
  • Heidi
  • · Replies 11 ·
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Undergrad MOND from MacDowell-Mansouri geometrical formulation
  • kodama
  • · Replies 19 ·
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Undergrad Primordial neutron star -- a new candidate for dark matter
  • kodama
  • · Replies 3 ·
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Graduate Why are Euler's angles picked exactly that way?
  • illidan4426
  • · Replies 1 ·
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Graduate Double copies and the black hole electron
  • mitchell porter
  • · Replies 7 ·
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High School How many electrons to make a stable gravitational object?
  • Feynstein100
  • · Replies 5 ·
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Undergrad Trouble for physical collapse models?
  • atyy
  • · Replies 3 ·
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Graduate Does the theory of information have anything to offer for physics?
  • SVN
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Graduate Current status of Tom Banks' Holographic space time?
  • AAAdrian
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Undergrad The logical impossibility of proving that indeterminism is true?
  • tade
  • · Replies 1 ·
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High School Why is Maldacena's paper published in two journals?
  • Demystifier
  • · Replies 12 ·
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High School Tangran, Inertial Mass and Gravitational Mass
  • dom_quixote
  • · Replies 8 ·
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Graduate Spectrum of the Liouville Operator
  • andresB
  • · Replies 2 ·
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Graduate How do we derive the number of string excitation modes for large N?
  • Eugene Chen
  • · Replies 1 ·
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Undergrad New anomaly observed in 12C X17
  • kodama
  • · Replies 16 ·
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Undergrad Hamilton's Principle (HP), Lagrangian
  • Trying2Learn
  • · Replies 20 ·
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Graduate Contravariance, Covariance, stress and position vector
  • Trying2Learn
  • · Replies 24 ·
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Undergrad Multiple (Non-Interacting) Universes?
  • Suekdccia
  • · Replies 11 ·
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High School Electrons & Photons: Are They Tiny Gaseous Planets?
  • nescient
  • · Replies 15 ·
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Graduate A Proposed Black Hole Entropy Calculation
  • PeterDonis
  • · Replies 21 ·
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High School The 3D Universe: A Speck in the 4D Universe
  • KiloTango
  • · Replies 10 ·
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Graduate Independence of generalized coordinates and generalized velocities
  • VVS2000
  • · Replies 5 ·
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Graduate Question about dilaton monopole interaction derivation
  • user1139
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Undergrad Is "nondimensionalization" a misnomer?
  • Grefus
  • · Replies 19 ·
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Undergrad "Different" energy eigenstates - clarification of meaning?
  • asimov42
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Graduate Subjectively deterministic-looking features of scatter plots
  • Swamp Thing
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Graduate The force from the energy gradient
  • user1139
  • · Replies 1 ·
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High School The Many TOE's Theory: Examining the Possibilities
  • fractalzen
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Graduate How are the intertwiners related to Schur's lemma?
  • Heidi
  • · Replies 23 ·
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Undergrad Graviweak Unification and Coleman-Mandula theorem
  • kodama
  • · Replies 7 ·
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Undergrad Carlo Rovelli, loop quantum gravity and point particles
  • TheHeraclitus
  • · Replies 4 ·
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Graduate Non-unitary gauge transformation
  • DuckAmuck
  • · Replies 3 ·
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High School What if we cut out the Big Bang and inflation?
  • Cody Livengood
  • · Replies 20 ·
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Undergrad Noncommutative geometry and asymptotic safe gravity and MOND
  • kodama
  • · Replies 3 ·
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Undergrad Trying To Conceptualize Two Dimensions Of Time
  • ohwilleke
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Undergrad Can Core Theory Be Derived From Nine Lines?
  • ohwilleke
  • · Replies 6 ·
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Graduate Loop quantum gravity and General relativity
  • Heidi
  • · Replies 9 ·
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Undergrad AI Discovers Alternate Physics - What Do You Think?
  • Joseph M. Zias
  • · Replies 2 ·
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Undergrad Laplace equation with irregular boundaries
  • physwiz222
  • · Replies 4 ·
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Undergrad Is the Continuum Limit of Spin Foam Dynamics Equivalent to Massless Gravitons?
  • ohwilleke
  • · Replies 2 ·
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Undergrad Axion Mass Acquisition: Do Axions Acquire Mass?
  • Ranku
  • · Replies 7 ·
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Undergrad Has anyone done a PPN formalism on Dark Matter? Or other non-GR?
  • mollwollfumble
  • · Replies 4 ·
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Graduate Three generations of Fermions from octonions Clifford alegbras
  • kodama
  • · Replies 61 ·
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Undergrad Explaining how the Higgs fields gives particles mass
  • Stevexyz
  • · Replies 16 ·
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Undergrad Current theory of composite quarks and leptons
  • LCSphysicist
  • · Replies 6 ·
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Undergrad The different generators of canonical transformations
  • andresB
  • · Replies 3 ·
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Undergrad Gravitational potential of an ellipsoid
  • ergospherical
  • · Replies 3 ·
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Undergrad Hamiltonian formalism and partition function
  • Simobartz
  • · Replies 1 ·
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Undergrad Would infinite entropy break all symmetries?
  • Suekdccia
  • · Replies 3 ·
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Undergrad Designing an Invariant Lagrangian: Rules and Considerations
  • accdd
  • · Replies 2 ·
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Undergrad Can Shape Dynamics Be Tested Against Quantum Mechanics?
  • lindberg
  • · Replies 3 ·
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Graduate Why do we need a quantum correction for black hole entropy?
  • somok
  • · Replies 9 ·
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High School Algebraic Operations on Energy-Momentum Relationships
  • alan123hk
  • · Replies 3 ·
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Undergrad Is a Unified Field Theory the Key to Understanding the Universe?
  • Delta2
  • · Replies 6 ·
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Undergrad Could the Lorentz symmetry be theoretically broken in vacuum?
  • Suekdccia
  • · Replies 3 ·
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Graduate Why Can't We Detect Cosmic Rays Beyond the GZK Limit?
  • Zuzana
  • · Replies 3 ·
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Undergrad Alternative ways to quantize Ashtekar variables
  • kodama
  • · Replies 2 ·
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Graduate Cross section-temperature equivalence
  • karmion
  • · Replies 2 ·
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Graduate Vacuum Transitions and Lorentz Symmetry Breaking
  • Suekdccia
  • · Replies 8 ·
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Graduate Roughly how many people in this world actually know about string theory?
  • alan123hk
  • · Replies 10 ·
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Undergrad Understanding the critic of this author for conventional S field
  • coquelicot
  • · Replies 12 ·
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Undergrad Higher Dimensional Time Implications?
  • LightningInAJar
  • · Replies 8 ·
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Graduate Volovik vs Witten vs Wen, etc.
  • lucas_
  • · Replies 71 ·
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