Beyond the Standard Models Forum

Post thread
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.
Graduate Vacuum energy in the Wess-Zumino model
  • · Replies 1 ·
Replies
1
Views
4K
Undergrad What is the relationship between the Hamiltonian and Lorentz invariance?
  • · Replies 6 ·
Replies
6
Views
3K
Undergrad When should we take numerology seriously?
  • · Replies 19 ·
Replies
19
Views
7K
Undergrad Spacetime as emergent quantum phenomenon
  • · Replies 10 ·
Replies
10
Views
4K
Graduate Charge in a Lie Group.... is it always a projection?
  • · Replies 4 ·
Replies
4
Views
3K
High School Significance of the Planck Particle
  • · Replies 5 ·
Replies
5
Views
4K
Undergrad Do Classical Physics Still Have Unsolved Problems?
  • · Replies 3 ·
Replies
3
Views
3K
Undergrad Example of a theory that was right after 20 years of failures?
  • · Replies 19 ·
Replies
19
Views
16K
Graduate De Sitter Vacua in String Theory and KKLT
  • · Replies 1 ·
Replies
1
Views
4K
Graduate Current Status of Loop Quantum Gravity: Successes, Failures & Open Questions
  • · Replies 10 ·
Replies
10
Views
7K
Undergrad Is something wrong with my understanding of Liouville's Theorem?
  • · Replies 4 ·
Replies
4
Views
2K
High School Does a field with 0 value "exist"?
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad Noether's theorem for discrete symmetry
  • · Replies 5 ·
Replies
5
Views
20K
High School Taming Infinities: Examining Quantum Theory and Spacetime with Penrose
  • · Replies 14 ·
Replies
14
Views
30K
Undergrad Back to Muller's 'Now and the Flow of Time'
  • · Replies 11 ·
Replies
11
Views
4K
Undergrad The Lagrangian and the second derivative?
  • · Replies 1 ·
Replies
1
Views
1K
Graduate On the Refined Index of BPS states
  • · Replies 1 ·
Replies
1
Views
3K
Graduate On non-perturbative renormalization and gravity
  • · Replies 2 ·
Replies
2
Views
3K
Graduate Quantization isn't fundamental
  • · Replies 163 ·
6
Replies
163
Views
27K
Undergrad Understanding the definition of a soliton
  • · Replies 3 ·
Replies
3
Views
1K
High School Tensor Conventions: V^*⊗V^*⊗V (1,2) vs (2,1)
  • · Replies 2 ·
Replies
2
Views
17K
Graduate PDE: Between Physics and Mathematics
  • · Replies 6 ·
Replies
6
Views
5K
Graduate Lagrange Densities: Intuitive Understanding
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad What can we gain/learn by knowing the Higg boson completely?
  • · Replies 30 ·
2
Replies
30
Views
5K
Undergrad How to derive Nielsen equation from Lagrange equation?
  • · Replies 4 ·
Replies
4
Views
14K
Undergrad Information Paradox in Black Holes and BSM
  • · Replies 9 ·
Replies
9
Views
3K
High School Why are we trying to unify all the physical forces?
  • · Replies 2 ·
Replies
2
Views
9K
Graduate Fine structure and fixed points
  • · Replies 16 ·
Replies
16
Views
6K
Graduate Non-locality: sheaf cohomology
  • · Replies 3 ·
Replies
3
Views
4K
Graduate Can String Theory Explain Fundamental Particles Through Standing Waves?
  • · Replies 3 ·
Replies
3
Views
3K
Undergrad Help me understand convolutions and Green's functions
  • · Replies 10 ·
Replies
10
Views
3K
Undergrad Understanding the stress-energy tensor
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad Volume in phase space- Louviles theorem
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Foundation of the laws of physics
  • · Replies 12 ·
Replies
12
Views
8K
Graduate Is GR fundamentally different from QM's interpretations?
  • · Replies 15 ·
Replies
15
Views
4K
Undergrad ER=EPR baby steps: causation or not?
  • · Replies 3 ·
Replies
3
Views
3K
Undergrad What is the 'formal' definition for Total Derivative?
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Simulating Quantum Loop Theory: Can S-Knots Be Represented Numerically?
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Different gauge coupling constants
  • · Replies 8 ·
Replies
8
Views
3K
Graduate Taxonomy of Theories in Theoretical Physics
  • · Replies 6 ·
Replies
6
Views
3K
Undergrad Intuition for why d<p>/dt = -dV(<x>)/dx
  • · Replies 2 ·
Replies
2
Views
6K
Graduate A question about the amplituhedron
  • · Replies 6 ·
Replies
6
Views
3K
Graduate Rund_Trautman Identity for fields
  • · Replies 8 ·
Replies
8
Views
2K
Undergrad Is there any theoretical basis for laws being 2nd order
  • · Replies 16 ·
Replies
16
Views
7K
High School Looking for a citation of Nima Arkani-Hamed
  • · Replies 2 ·
Replies
2
Views
2K
High School What is the fundamental nature of matter and energy?
  • · Replies 4 ·
Replies
4
Views
7K
High School Is it possible to stop the graviton?
  • · Replies 19 ·
Replies
19
Views
4K
Graduate Quantum Gravity Research Group -- any standing in mainstream Physics?
  • · Replies 2 ·
Replies
2
Views
3K
Graduate What Are Examples of Lagrangians in Various Disciplines?
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Fundamental equation in string theory
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Is the composite Higgs still a thing?
  • · Replies 6 ·
Replies
6
Views
3K
Undergrad Limits of the variatonal principle
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Is there new LHC data on coupling constant running?
  • · Replies 1 ·
Replies
1
Views
3K
Undergrad Compatibility of Physics and Abstract Algebra
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Dark Matter and Baryon Asymmetry: Is It Possible?
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Does the unforced quartic oscillator behave chaotically?
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad Lattice standard model (Wang & Wen)
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Publish a Theory: An Alternative Gravity & Dark Matter Explained
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Numerology from Vafa and Visser
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Status of large higher dimensions
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Boltzmann equation and Hamiltonian
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad SUSY and GUTs all but eliminated by latest ACME experiment
  • · Replies 5 ·
Replies
5
Views
3K
Graduate Summation Index Notation in the Transformation Equations
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Mathematical series in physics - Why and when do we need them?
  • · Replies 13 ·
Replies
13
Views
4K
Undergrad Does the Principle of Least Action Have a Physical Meaning?
  • · Replies 90 ·
4
Replies
90
Views
12K
Graduate No metastable type IIB de Sitter vacua
  • · Replies 73 ·
3
Replies
73
Views
18K
Graduate Chain Rule in Lagrangian Transformation
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Quantum Gravity -- intro papers for 2nd year MSc student?
  • · Replies 4 ·
Replies
4
Views
3K
Graduate Does it make sense to break T duality at fundamental level?
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Do gravitons have frequency, like photons?
  • · Replies 3 ·
Replies
3
Views
3K
Undergrad Why Is Energy Defined as E=mc^2 and Not Another Dimension?
  • · Replies 5 ·
Replies
5
Views
2K
Graduate Baroque neutrinos and Zee-Babu model
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Theories without Fundamental Space and Time
  • · Replies 50 ·
2
Replies
50
Views
10K
Undergrad How credible are CKM matrix limits on new physics?
  • · Replies 4 ·
Replies
4
Views
3K
Undergrad General definition of spatial dimension?
  • · Replies 11 ·
Replies
11
Views
5K
Undergrad Is each path in a phase portrait unique?
  • · Replies 2 ·
Replies
2
Views
981
Undergrad Summation convention with expressions containing parentheses
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Why do the signs alternate when using Gauss' law for gravity?
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Nuclear Processes in Other Universes: Varying the Strength of the Weak Force
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad A Question about the Lagrangian
  • · Replies 8 ·
Replies
8
Views
2K
Graduate Hardy's approach to quantum gravity and QM interpretation
  • · Replies 37 ·
2
Replies
37
Views
8K
Undergrad How do we justify "Natural" Units
  • · Replies 9 ·
Replies
9
Views
3K
Graduate What Constitutes a Natural Completion of a Physical Theory?
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad Deriving Geodesic Equation from Lagrangian
  • · Replies 7 ·
Replies
7
Views
4K
Undergrad Masses of Fermions, string theory, Higgs mechanism
  • · Replies 3 ·
Replies
3
Views
2K
Graduate What exactly is the string theory landscape?
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Question about the associahedron/amplituhedron
  • · Replies 5 ·
Replies
5
Views
3K
Undergrad Implications of Nishida's mass/CKM observation
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Swampland Conjecture: Explained, Implications & Incompatibility
  • · Replies 14 ·
Replies
14
Views
6K
Undergrad Time reversal symmetry in physics
  • · Replies 11 ·
Replies
11
Views
4K
Graduate Difference between configuration space and phase space
  • · Replies 1 ·
Replies
1
Views
7K
High School Justification for emergent anything
  • · Replies 7 ·
Replies
7
Views
2K
High School Is string theory a deterministic hidden variable theory?
  • · Replies 22 ·
Replies
22
Views
6K
High School Help with a string theory equation
  • · Replies 6 ·
Replies
6
Views
4K
Undergrad Is Non-Commutative Geometry the Key to a Discrete Model of Spacetime?
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad Derivation of the Euler-Lagrangian
  • · Replies 12 ·
Replies
12
Views
5K
Graduate Has Theoretical Physics met a bit of a roadblock?
  • · Replies 31 ·
2
Replies
31
Views
4K
High School Simple thought experiment merging GR and QT
  • · Replies 16 ·
Replies
16
Views
3K
Graduate Emergent Property: Usefulness in Physics
  • · Replies 1 ·
Replies
1
Views
1K
High School Graphene Spinning Speed: Theoretical Max RPM of 1m Radius
  • · Replies 3 ·
Replies
3
Views
1K