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 Strings can be seen? Surely not
- james gander
- · Replies 8 ·
Graduate What is Lee Smolin's Maximal Variety Principle in Quantum Mechanics?
- Jimster41
- · Replies 10 ·
Can a Person Escape an Endless Fall Through Two Facing Portals?
- Toby N
- · Replies 3 ·
Graduate How do you express 3D charge distributions using the Dirac Delta function?
- ZetaX
- · Replies 2 ·
Graduate What is the quantized form of the strings lagrangian?
- Topolfractal
- · Replies 10 ·
Graduate Conformal gravity vs loop quantum gravity
- kodama
- · Replies 2 ·
Graduate Can string theory be formulated without quantizing a classical Lagrangian?
- Topolfractal
- · Replies 9 ·
Graduate Phlip Mannheim's conformal theory of everything
- mitchell porter
- · Replies 4 ·
Graduate Noether's Theorem and the real world
- sweet springs
- · Replies 3 ·
Undergrad Are There Ever Multiple Theories That Fully Explain the Same Phenomenon?
- xaratustra
- · Replies 4 ·
Graduate Is there a reversed GKPW for AdS/CFT?
- Demystifier
- · Replies 5 ·
Graduate Generating functions and Legendre transforms
- Coffee_
- · Replies 17 ·
Graduate Why is Supersymmetry Necessary in String Theory?
- "pi"mp
- · Replies 1 ·
Graduate Lagrangian without K.E and any anthromorophic answer
- bronxman
- · Replies 7 ·
Graduate What is the recommended resource for learning the basics of AdS/CFT?
- Maybe_Memorie
- · Replies 7 ·
Graduate Why is it called least action if the stationary point could be a maximum or saddle?
- Nick.
- · Replies 2 ·
Graduate Analytical continuation free energy
- muzialis
- · Replies 2 ·
Graduate Experimental Limits on Spin-Foam Effects From Quasars
- ohwilleke
- · Replies 2 ·
Graduate Seesaw mass matrix and neutrino masses
- rruben
- · Replies 2 ·
Graduate Confirm my reasoning on a generating function proof
- Coffee_
- · Replies 2 ·
Graduate Is there a scientific hypothesis for spiral-shaped time?
- awakeandalive
- · Replies 1 ·
Graduate Is Isospin Conversation Required In The Standard Model?
- ohwilleke
- · Replies 4 ·
Graduate Exact solutions of the Wheeler–DeWitt equation with Yamabe construction
- Mar3que
- · Replies 1 ·
Graduate Condition for Phase transition
- JorisL
- · Replies 1 ·
Undergrad Which Books Focus on the Formulation of Differential Equations?
- avarmaavarma
- · Replies 3 ·
Undergrad Building intuition for rank 2 tensors from vectors
- stabu
- · Replies 8 ·
Graduate Poisson equation with a dirac delta source.
- Coffee_
- · Replies 6 ·
Graduate What is the meaning of local field theory in classical field theory?
- spaghetti3451
- · Replies 2 ·
Graduate New properties of "standard model effective field theory"
- mitchell porter
- · Replies 7 ·
Graduate What does it mean to "minimise" an action ?
- Cluemore
- · Replies 6 ·
Graduate Causality of the wave equation
- Coffee_
- · Replies 4 ·
Graduate Volume elements of phase space
- terra
- · Replies 2 ·
Graduate The Role of Hamiltonian Time Dependence in Energy Conservation
- Wminus
- · Replies 7 ·
Graduate Marginal stabilty in s domain
- FrankJ777
- · Replies 1 ·
Graduate Magnetic monopoles and Noether theorem
- tom.stoer
- · Replies 12 ·
Graduate Is imaginary time scientifically serious in quantum gravity and relativity?
- kodama
- · Replies 19 ·
Graduate New first order Lagrangian for General Relativity
- MTd2
- · Replies 2 ·
Graduate Has Witten announced his new geometry?
- "pi"mp
- · Replies 2 ·
Graduate Is Quantum foam a part of string theory?
- Pjpic
- · Replies 3 ·
Graduate What would it take to fully simulate a physical system?
- JamesN
- · Replies 4 ·
Graduate What is the physical significance of Poisson brackets?
- "Don't panic!"
- · Replies 3 ·
Graduate What is the value of theoretical physics without experimental data?
- davisthomas
- · Replies 2 ·
Graduate Is the Einstein–Cartan theory renormalizable?
- itssilva
- · Replies 1 ·
Graduate Physics Mathematics and Analogies
- jimmylegss
- · Replies 4 ·
Graduate What is the most *Fundamental* theory in physics?
- Arkadeep
- · Replies 1 ·
Graduate Multi-scale entanglement renormalization ansatz Tensor network
- kodama
- · Replies 1 ·
Graduate The naturalness of the zeon length scale
- marcus
- · Replies 5 ·
Graduate NS sector and the Numberoperator
- moriheru
- · Replies 5 ·
Graduate What makes phase space special?
- thegreenlaser
- · Replies 1 ·
Graduate Action integral: Just a constant?
- Wminus
- · Replies 8 ·
Graduate Why can't we perceive extra dimensions?
- Happiness
- · Replies 3 ·
Graduate The 'time oriented coarse graining' hypothesis -- "Rovelli"
- John86
- · Replies 41 ·
Graduate Has B-L some role in the mass matrix?
- arivero
- · Replies 7 ·
Graduate Why Don't SUSY Leptons and Quarks Exist Alongside Standard Model Bosons?
- orricl
- · Replies 9 ·
Graduate Is gravity deterministic or probabilistic in String Theory?
- Gerinski
- · Replies 2 ·
Graduate Does Ads/CFT correspondence apply to LQG Kodama state?
- kodama
- · Replies 2 ·
Graduate Scalar field energy density and pressure in hot universe
- karlzr
- · Replies 1 ·
Graduate Why Do String Theory and Fermions Require Different Treatments?
- moriheru
- · Replies 1 ·
Graduate Before Vectors, was it Components, and Quaternions?
- sponsoredwalk
- · Replies 2 ·
Graduate Unpacking the Controversial EmDrive: Explanations and Implications
- newjerseyrunner
- · Replies 1 ·
Graduate Hypothetical Shape of a Spacetime and Time Travel
- HuskyNamedNala
- · Replies 12 ·
Graduate Meaning of "Bundle Connection" in String Theory?
- "pi"mp
- · Replies 5 ·
Graduate Is the boundary of a spinfoam a spin network?
- naima
- · Replies 5 ·
Graduate Solving Trivial SUSY Questions: Adel Bidal Introduction to SUSY
- the_pulp
- · Replies 3 ·
Graduate What Is Loschmidt's Paradox and Its Implications for Quantum Mechanics?
- Jimster41
- · Replies 5 ·
Graduate Is a warp drive possible? How long until we develop one?
- GiantSheeps
- · Replies 1 ·
Graduate Alain homers with Ali and Slava on base : further thoughts
- Jimster41
- · Replies 5 ·
Graduate Why is supersymmetry studied if experiments haven't found evidence for it?
- itssilva
- · Replies 29 ·
Graduate In what way is M-Theory different from Loop Quantum Gravity?
- nuclearhead
- · Replies 1 ·
Graduate Relating Behaviour of a Driven System to the Undriven Modes
- PGPhys
- · Replies 1 ·
Graduate If Superstring theory is not a TOE what is it?
- nuclearhead
- · Replies 11 ·
Graduate Is there a holographic principle in loop quantum gravity?
- kodama
- · Replies 5 ·
Graduate Local measurement of the Vacuum Energy?
- friend
- · Replies 3 ·
Graduate Prerequisites for studying conformal field theory
- Fedecart
- · Replies 3 ·
Graduate LQG is not proved to be locally lorentz invariant. (Bee)
- MTd2
- · Replies 4 ·
Graduate What does it mean for a scalar field to be constant on a surface?
- whatisreality
- · Replies 1 ·
Graduate Does h-bar change in gravitational waves?
- friend
- · Replies 18 ·
Graduate Why can the Jacobian represent transformations?
- Coffee_
- · Replies 2 ·
Graduate If SUSY is found, is String Theory the expected why?
- Jimster41
- · Replies 8 ·
Graduate Four-Dimensional Entropy from Three-Dimensional Gravity
- kodama
- · Replies 11 ·
Graduate Smolin's Octopus: Bridging the Standard Model and LQG?
- MTd2
- · Replies 1 ·
Graduate Does the Planck Unit of Time Support Julian Barbour's Theory on the End of Time?
- Rajkovic
- · Replies 2 ·
Graduate Evidence Against String Theory? Paper
- Psip
- · Replies 22 ·
Graduate Got asked, "Why does there 'need' to be a UFT"
- Cake
- · Replies 35 ·
Graduate How did the Poisson brackets get derived, and from what.
- houlahound
- · Replies 1 ·
Graduate How to drop terms in a Lagrangian?
- Dixanadu
- · Replies 16 ·
Graduate What is String Theory? | Stringtheory
- wilson
- · Replies 1 ·
Graduate Is Goldstein's Classical Mechanics suitable for self-study?
- harman
- · Replies 1 ·
Graduate A Physical Situation Which Physics Rules Collapse
- Quarlep
- · Replies 6 ·
Graduate Is Loop Quntuam gravity plausible formulation of quantum gravity
- kodama
- · Replies 27 ·
Graduate Why Does the Lagrangian Depend on Time and Position?
- acegikmoqsuwy
- · Replies 5 ·
Graduate Why isn't Landau credited as an author in Vol 4?
- Maurice7510
- · Replies 6 ·
Graduate Green's function + method of images
- MMS
- · Replies 3 ·
Graduate Why must the boundary term in the Euler-Lagrange derivation vanish?
- TimeRip496
- · Replies 4 ·
Graduate A firewall confusion related to disentangling the vacuum
- S.Daedalus
- · Replies 2 ·
Graduate How many orthogonal spins can an object have?
- onethatyawns
- · Replies 7 ·
Graduate How quantizable matter gravitates
- friend
- · Replies 8 ·
Graduate Born-Oppenheimer applied to quantum geometry
- marcus
- · Replies 2 ·
Graduate Are Constraints Necessary in Hamiltonian Dynamics?
- oldspice1212
- · Replies 2 ·
Graduate Lagrangian invariance, short question
- Coffee_
- · Replies 16 ·