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Join in expert discussion on quantum physics. Quantum physics is the mathematical description of the motion and interaction of subatomic particles. Quantum Mechanics and Field Theory.

Quantum Interpretations and Foundations

Undergrad On computing quantum waves exactly from classical action
Undergrad Particle physics and quantum physics
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Graduate Pseudospectral method vs spectral method
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Graduate Defining Direct Products in Exponents
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Graduate Definition of time-ordered product for Dirac spinors
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Graduate Is light really a particle or a wave?
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Graduate What Are Mesoscopic Cat States and Their Superpositions?
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Graduate Where can I find perturbation theory formulas up to fourth order?
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Graduate Understanding Energy and Spin Interactions in the Ising Model
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Graduate Understanding Dipole Neutrality, Wave Functions & Dipole Moment
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Graduate Point symmetry group matrix representations
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Graduate Finding the Result of (a+a#)^n
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Graduate What happens to Entangled Photons after a polarizing beamsplitter (PBS)?
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Graduate Galilean Algebra in the low velocity limit of Poincare Algebra (Weinberg vol 1)
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Graduate Perturbations to all orders (Srednicki ch19)
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Graduate What's the (Electron) Frequency, Kenneth?
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Graduate How Do Photons Carry Electromagnetic Force?
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Graduate Quantum teleportation implications
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Graduate What Energy is Released at the Moment of Death?
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Graduate Degeneracy of the 3d harmonic oscillator
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Graduate Quantum Physics and Black holes
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Graduate Sakurai 3.5.37: Formula for Matrix Element <j m | S^2_+ |j m >
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Graduate No info transferred means SR and Entanglement do not conflict
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Graduate Quantum Entanglement - electron spins
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Graduate Why take FINITE time for an electron to observe a photon?
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Graduate What Happens When Electrons Collide with Photons and Lasers?
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Graduate Degenerate Fermi Gas: Why is it Called Degenerate?
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Graduate Why do particles travel along smooth paths in quantum mechanics?
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Graduate How is superfluidity in liquid helium explained by quantum mechanics?
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Graduate Uncertainty Principle and Fourier Transform
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Graduate Average energy of atoms in the Stern–Gerlach experiment
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Graduate Quantum information/symmetry/group theory.
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Graduate Why is superposition prinple a first principle in QM
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Graduate What does not normalizable ential
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Graduate Why is Orbital Angular Momentum Quantized in Quantum Mechanics?
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Undergrad Electrons Settling to Lower Energy State: How Long Does Light Last?
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Graduate Central charge and Lorentz Algebra
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Graduate Can BEC experiments shed light on the mysteries of quantum gravity?
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Graduate Information travel faster than c ?
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Graduate Can we do double slit experiment using quasiparticles?
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Graduate Energy of Measurement - Quantum Mechanics
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Graduate Srednicki Equation 7.7: Explained
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Graduate SU(2) symmetric/antisymmetric combination using young tableaux
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Graduate Can We Model Chess Pieces as Quantum Particles?
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Graduate Double slit experiment, observer effect
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Graduate Is the Scattering Matrix in Quantum Field Theory Inherently Unitary?
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Graduate Quantum Entanglement: Does Normalisation Matter?
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Graduate Causality in quantum mechanics and relativity
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Graduate Is Every Hermitian Operator Observable?
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Graduate Does the Heisenberg Uncertainty Principle make human teleportation impossible?
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Graduate Dimensionless equation schrodinger with field magnetic
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Graduate Photon propagator in an arbitrary gauge
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Undergrad Can Two Protons Exist in an Atom's Nucleus Without Neutrons?
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Graduate BRS: The Weyl Vacuums. I. Definition, Geometrical Properties, Symmetries
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Graduate Srednicki 2.17. How does metric act on Levi Cevita symbol?
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Graduate Radiation from free electron with small acceleration
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Graduate Instantanious Communication possible?
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Graduate Waveform produced by an atomic transition
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Graduate Quantum Immortality: Implications of MWI on Death?
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Graduate Symmetry factors in Feyman Diagrams
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Graduate Local density of number of photons
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Graduate Sommerfeld quantisation:relation between energy and potential
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Graduate S-orbitals, angular momentum and Heisenberg uncertainty
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Graduate How can I solve for Equation 2.16 in Srednicki?
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Graduate Simplifying Feynman Diagram for Nasty 10 Point Green's Function?
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Graduate The expectation of an expection (relating to Wick's Theorem)
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Graduate Understanding Normalization in Spin Sum: Peskin vs. Kaku and Zee's Approach"
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Graduate Photon absorption via changing EM field
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Graduate Thought Experiment: Weight of Electrons & Positrons in a Container
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Graduate S-Matrix in non-relativistic limit
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Graduate How Do We Calculate the Composite Spin of a System with Three or More Particles?
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Graduate Quantum Entanglement: Explained with an Example
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Graduate Is there an equivalent of the HUP for spins?
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Graduate Electrodynamics question and maybe quantum/classical misunderstanding
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Undergrad Does a laser experience recoil due to photon momentum?
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Undergrad How is it then when you colide 2 protons
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Graduate Integral involving exponentials and the Time ordering operator
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Undergrad Quantization of Length: Can You Achieve Every Length Between 1" and 2"?
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Graduate Quantum Mechanical Acceleration Operator: Help Needed
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Graduate Understanding Spin: Share Your Ideas!
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Graduate Perturbation Theory: Deciphering Missing Lines of Explanation
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Graduate Solving radial wavefunction in odd central potential
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Graduate Understanding S-Wave and P-Wave Annihilation
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Graduate Bound states of Yukawa potential
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Graduate Energy Uncertainty Less For High-Energy Particles?
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Graduate Does instantaneous communication implies a preferrred Lorentz frame?
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Graduate What is semi-classical level counting?
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Graduate What Are the Implications of Srednicki's \langle 0 \mid \phi(x) \mid 0 \rangle?
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Graduate Sol'n of Schrodinger's Eq: A e^{kx-wt} & A Sin(kx-wt)
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Undergrad Laymans question about observational effect
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Graduate Representations and change of basis
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Graduate Behaviour of electron as wave and Particle
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Graduate BRS: Cellular homology with Macaulay2
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Graduate Disproving Shankar's PQM Equations: Example 1.8.6 | Farside Physics
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Graduate Oscillation frequency of probability density P(x,t)
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Graduate Hydrogen spin-orbit interaction
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Undergrad How gravity can be bent if its just a messender particle.
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Graduate Lorentz Invariant Majorana Neutrinos
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Graduate Writing a matrix as an outer product expansion.
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Graduate Solution for Dirac equation with zero mass.
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Graduate Orthochronous Lorentz Transformations
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