Beyond the Standard Models Forum

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 Any application of AdS/CFT to nucleon structure?

  • petergreat
  • · Replies 2 ·
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2

Graduate Particle Physics in Curved Spacetime (Background Independent)

  • rogerl
  • · Replies 37 ·
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37

Graduate A question on the action as a function of the co-ordinates in Landau 1

  • dfj
  • · Replies 4 ·
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4

Graduate Does the nabla operator has a unit?

  • jwillie2000
  • · Replies 6 ·
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6

Graduate How do I know if the Hamiltonian is constant?

  • komodekork
  • · Replies 9 ·
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9

Graduate String Theory State and History

  • Pythagorean
  • · Replies 57 ·
2
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57

Graduate Classical Limit in LQG: Has GR Been Shown?

  • Physics Monkey
  • · Replies 27 ·
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27

Graduate Question on transformation of coordinates.

  • yungman
  • · Replies 29 ·
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29

Graduate Is Quantum Gravity only related to Planck Scale?

  • rogerl
  • · Replies 7 ·
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7

Graduate Closed Strings and Virasoro algebra

  • earth2
  • · Replies 3 ·
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3

Graduate Progress of Bouncing Universe Theory

  • wolram
  • · Replies 16 ·
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16

Graduate Is Physics More About Models Than Reality in Explaining Phenomena Like Gravity?

  • rogerl
  • · Replies 2 ·
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2

Graduate Solving a Lagrangian using an Ansatz

  • bantalon
  • · Replies 1 ·
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1

Graduate Experimental Predictions from String Theories

  • ApplePion
  • · Replies 3 ·
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3

Graduate Clarifying Open String Hamiltonian for Witten's Book

  • cuerdero
  • · Replies 7 ·
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7

Graduate Bogolubov Transformations: How to Normalize the Coefficients?

  • LAHLH
  • · Replies 6 ·
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6

Graduate Solving the Mystery of -1/12 in String Theory

  • zaybu
  • · Replies 26 ·
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26

Graduate Dimensional regularization and Fractals - Is it a crackpot idea?

  • petergreat
  • · Replies 3 ·
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3

Graduate Strings as described in Superstring theory

  • robertroman10
  • · Replies 3 ·
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3

Graduate What is meant by no complete TOE ?

  • curtdbz
  • · Replies 11 ·
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11

Graduate Probability of Inflation in Loop Quantum Cosmology (new Ashtekar Sloan paper)

  • marcus
  • · Replies 8 ·
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8

Graduate A bigger structure than multiverse

  • dhillonv10
  • · Replies 3 ·
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3

Graduate String Theory: Quark/Atom Strings Estimate

  • robertroman10
  • · Replies 4 ·
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4

Undergrad Can't there be no approximation?

  • cometzir
  • · Replies 29 ·
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29

Graduate Foundations of a theory of quantum gravity - Johan Noldus' book.

  • MTd2
  • · Replies 134 ·
5
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134

Graduate Jacobi least time vs. Fermat Hamilton

  • andrewr
  • · Replies 3 ·
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3

Graduate Is there any definitive answer on unitarity in quantum gravity

  • petergreat
  • · Replies 12 ·
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12

Graduate Are Physics Models Truly Simple or Inherently Complex?

  • revo74
  • · Replies 7 ·
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7

Undergrad Verify Integration and differentiation of a vector.

  • yungman
  • · Replies 6 ·
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6

Undergrad Are strings the key to understanding energy in string theory?

  • luan
  • · Replies 2 ·
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2

Graduate Isn't M-theory and the multiverse idea a bit discouraging?

  • reoffender
  • · Replies 4 ·
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4

Graduate How can we find out from the Lagrangian if energy is conserved?

  • czdatka
  • · Replies 2 ·
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2

Graduate Do the fundamental forces continue to break down at lower energies?

  • middistance91
  • · Replies 3 ·
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3

New FQXI essay contest Is Reality Digital or Analog?

  • chronon
  • · Replies 41 ·
2
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41

Graduate Understanding Hamiltonian Field Equations and Their Applications in Field Theory

  • MManuel Abad
  • · Replies 8 ·
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8

Graduate 2-form and dissipative systems

  • homology
  • · Replies 39 ·
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39

Graduate Why is QM incompatible with GR and how does string theory solve this? Or M-Theory?

  • SeventhSigma
  • · Replies 7 ·
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7

Graduate Why point particle interaction has UV divergence,but string interaction does not?

  • ndung200790
  • · Replies 3 ·
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3

Graduate Latest results from the LHC are casting doubt on the theory of supersymmetry

  • J.F.
  • · Replies 27 ·
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27

Graduate Naked singularities: evidence against compactified dimensions?

  • Lievo
  • · Replies 44 ·
2
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44

High School Reason Behind Structure of Equations

  • prosteve037
  • · Replies 13 ·
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13

Graduate Holography and Calabi-Yau compactifications

  • crackjack
  • · Replies 5 ·
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5

Graduate The road to AdS/CFT-Correspondence

  • Hymne
  • · Replies 8 ·
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8

Graduate Best Approach to Quantum Gravity

  • rogerl
  • · Replies 2 ·
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2

Graduate EM Field Lagrangian: What Defines It?

  • snoopies622
  • · Replies 5 ·
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5

Graduate Lectures on Loop Gravity (8 talks on the new version)

  • marcus
  • · Replies 13 ·
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13

Graduate Core lecture abstracts for QG school

  • marcus
  • · Replies 18 ·
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18

Graduate Quantum from classical behavior in higher dimensions?

  • SupremeFunky
  • · Replies 4 ·
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4

Graduate Dimensionless Equations: Understanding the Role of Units in Physical Equations

  • puzzler7
  • · Replies 3 ·
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3

Graduate Interaction energy and gauge invariance

  • arpharazon
  • · Replies 1 ·
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1

Graduate What are gravitons exactly and how will they help us prove string

  • d.smith292
  • · Replies 17 ·
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17

Graduate Information about black branes

  • unih
  • · Replies 2 ·
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2

Graduate The Probing of, Approximation to and Idealization of Structure for Foundations

  • bensprott
  • · Replies 6 ·
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6

Graduate Why is spacetime four-dimensional

  • tom.stoer
  • · Replies 78 ·
3
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Graduate Modular invariance in string theory

  • petergreat
  • · Replies 14 ·
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14

Graduate Hamilton-Jacobi Theory: Why No Time Dependence?

  • Zorba
  • · Replies 5 ·
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5

Graduate Where can I read about the superconformal algebra in 4D?

  • petergreat
  • · Replies 8 ·
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8

Undergrad Book for the application of Calculus in Physics?

  • Ashu2912
  • · Replies 2 ·
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2

Graduate Garett Lisi's 248-dimensional theory?

  • Matthewkind
  • · Replies 12 ·
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12

Graduate Is String Theory the Key to Unifying Quantum Physics and Gravity?

  • whatisreality
  • · Replies 8 ·
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8

Graduate Is Verlinde's Gravity Theory Based on Relativistic Assumptions?

  • Pengwuino
  • · Replies 104 ·
4
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104

Graduate Ontology of AdS/CFT classical on the bulk?

  • SupremeFunky
  • · Replies 1 ·
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1

Graduate Can Loop Gravity and String Theory be Compared Fairly?

  • marcus
  • · Replies 1 ·
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1

Graduate LQC and string theory combined in one theory

  • dhillonv10
  • · Replies 51 ·
2
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51

Graduate What is the physical significance of the iFactor?

  • purrcy
  • · Replies 7 ·
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7

Graduate Is Complexity in the Universe Emergent from Simpler Systems?

  • BruceNakagawa
  • · Replies 3 ·
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3

Graduate Semiclassical Limit of Causal Dynamical Triangulations (Ambjorn, Loll et al)

  • marcus
  • · Replies 2 ·
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2

Graduate How could spacetime become discretised at the Planck scale?

  • DJsTeLF
  • · Replies 27 ·
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27

Graduate What is the physical interpretation of this calculus of variations problem?

  • catpants
  • · Replies 2 ·
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2

Graduate AdS/CFT correspondence and the cosmological constant

  • dhillonv10
  • · Replies 3 ·
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3
  • Poll Poll

Graduate Theoretical Physics: Most Precise & Powerful Science

  • raam86
  • · Replies 16 ·
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16

Graduate Is the Creation of Our Universe from Nothing Truly Viable and Consistent?

  • haushofer
  • · Replies 84 ·
3
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84

Graduate Century interons and quantum flux

  • jonnke123
  • · Replies 1 ·
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1

Graduate Do gravitons interact with photons?

  • johne1618
  • · Replies 6 ·
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6

Graduate Is speculation in multiverses as immoral as speculation in subprime mortgages?

  • D H
  • · Replies 17 ·
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17

Graduate Why did the other dimensions stay small in M-theory?

  • cansay27
  • · Replies 2 ·
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2

Graduate QG five principles: superpos. locality diff-inv. cross-sym. Lorentz-inv.

  • marcus
  • · Replies 139 ·
5
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139

Graduate Can Multiple Infinite Quantum Fields Coexist in Spacetime?

  • sci-guy
  • · Replies 10 ·
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10

Graduate Counting Ghost Numbers in String Theory | Beltrami Parametrization

  • christodouloum
  • · Replies 6 ·
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6

Graduate Joe Henson rediscovers Rovelli Smerlak (dropping ontic definiteness assumption)

  • marcus
  • · Replies 6 ·
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6

Graduate A question about graviton self-interactions in QFT

  • ensabah6
  • · Replies 13 ·
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13

Graduate New Limits on Planck Scale Lorentz Violation (Floyd Stecker)

  • marcus
  • · Replies 0 ·
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0

Graduate Signs LQG has the right redefinition (or wrong?)

  • marcus
  • · Replies 140 ·
5
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140

Graduate How will we know a true T.O.E. when we see it?

  • mrspeedybob
  • · Replies 1 ·
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1

Graduate Nonlinear, nonrelative wavefunction

  • Loren Booda
  • · Replies 3 ·
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3

Graduate Unraveling the Mystery of Super Symmetry

  • Lazernugget
  • · Replies 14 ·
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14

Graduate Clarification: relation spin network/spinfoam and Wen's Qbit lattice

  • ensabah6
  • · Replies 10 ·
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10

Graduate Suppose gravitons and Higgs were quasiparticles like phonons

  • ensabah6
  • · Replies 7 ·
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7

Graduate Relationship between Lagrangian and Energy

  • theneedtoknow
  • · Replies 2 ·
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2

Graduate What is the center of SU(3) group

  • sufive
  • · Replies 1 ·
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1

Graduate How to mobilize solid molecules

  • anwerfz
  • · Replies 4 ·
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4

Graduate If LQG now satisfactory, how to add matter?

  • marcus
  • · Replies 82 ·
3
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82

Graduate Gravity as a Zitterbewegung Interaction

  • Dcase
  • · Replies 2 ·
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2

Graduate State Sums and (Quantum) Geometry: Frank Hellmann's PhD thesis

  • marcus
  • · Replies 1 ·
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1

Graduate How Much Info for Building a Universe?

  • wolram
  • · Replies 9 ·
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9

Graduate Lecture of Edward Witten and 2nd Dutch-IFT School (BRAZIL)

  • ccdantas
  • · Replies 1 ·
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1

Graduate An Exceptionally Simple Theory of Everything

  • marcus
  • · Replies 208 ·
7
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208

Graduate String Theory vs. Superstring theory

  • Swapnil
  • · Replies 5 ·
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5

Graduate EM Lagrangian in terms of E and B

  • Rocky Raccoon
  • · Replies 8 ·
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8

Graduate Noether's Theorem Explained: Symmetric Quantity & Conservation Laws

  • unchained1978
  • · Replies 1 ·
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1