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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.

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Quantum Interpretations and Foundations

Particle vs Wave Interpretations of QM
1.3K threads
Undergrad Particle vs Wave Interpretations of QM
Graduate Hidden variables, Bell's theorem, etc
  • DeShark
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Graduate Two electrons in a potential well
  • conway
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Graduate Angular momentum (L) in z-axis of hydroxyl radical
  • Nezva
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Graduate Do physicists agree that unified field exists ?
  • PatentLawyer
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Graduate Eigenvalues of Hydrogen Atom & Uncertainty Principle
  • rtal
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Graduate Matrix Elements: J_+*J_- = J^2 - J_z^2+hbarJ_z?
  • Nusc
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Graduate A Quantum Mechanical model of measurement
  • peteratcam
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Graduate What Does a Complex Momentum Value Indicate in Quantum Mechanics?
  • intervoxel
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Graduate Semiclassical Approach & Langer's Modification of Quantization Rules
  • funduk89
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Graduate Do Point-Particles Truly Lack Spatial Extension?
  • FredMadison
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Graduate Why Did We Shift from Electron Orbitals to Electron Clouds?
  • alan.b
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Graduate Can Electron Spin Affect Current Flow?
  • DrMarioworld1
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Graduate Can the Stern-Gerlach experiment accurately measure electron spin?
  • cragar
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Graduate Solving Antisymmetric Part of Grassman Numbers Sum
  • LAHLH
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Graduate 2d Wavepacket in relativistic QM
  • pitfall
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Graduate Notation question: partial derivative with arrow
  • redrzewski
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Undergrad Particle physics and quantum physics
  • shreaks4u
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Graduate Pseudospectral method vs spectral method
  • Winzer
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Graduate Defining Direct Products in Exponents
  • Nusc
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Graduate Definition of time-ordered product for Dirac spinors
  • sith
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Graduate Is light really a particle or a wave?
  • JK423
  • · Replies 10 ·
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Graduate What Are Mesoscopic Cat States and Their Superpositions?
  • kexue
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Graduate Where can I find perturbation theory formulas up to fourth order?
  • jeffreydk
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Graduate Understanding Energy and Spin Interactions in the Ising Model
  • iking
  • · Replies 4 ·
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Graduate Understanding Dipole Neutrality, Wave Functions & Dipole Moment
  • Godwin Kessy
  • · Replies 5 ·
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Graduate Point symmetry group matrix representations
  • torehan
  • · Replies 5 ·
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Graduate Finding the Result of (a+a#)^n
  • mkbh_10
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Graduate What happens to Entangled Photons after a polarizing beamsplitter (PBS)?
  • DrChinese
  • · Replies 23 ·
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Graduate Galilean Algebra in the low velocity limit of Poincare Algebra (Weinberg vol 1)
  • maverick280857
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Graduate Perturbations to all orders (Srednicki ch19)
  • LAHLH
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Graduate What's the (Electron) Frequency, Kenneth?
  • gareththegeek
  • · Replies 33 ·
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Graduate How Do Photons Carry Electromagnetic Force?
  • Sgt. Pasteur
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Graduate Quantum teleportation implications
  • GeorgCantor
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Graduate What Energy is Released at the Moment of Death?
  • crazygoodvibe
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Graduate Degeneracy of the 3d harmonic oscillator
  • mavyn
  • · Replies 12 ·
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Graduate Quantum Physics and Black holes
  • fcb
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Graduate Sakurai 3.5.37: Formula for Matrix Element <j m | S^2_+ |j m >
  • Nusc
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Graduate No info transferred means SR and Entanglement do not conflict
  • thenewmans
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Graduate Quantum Entanglement - electron spins
  • rt_c
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Graduate Why take FINITE time for an electron to observe a photon?
  • luxiaolei
  • · Replies 13 ·
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Graduate What Happens When Electrons Collide with Photons and Lasers?
  • titanseas
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Graduate Degenerate Fermi Gas: Why is it Called Degenerate?
  • mkbh_10
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Graduate Why do particles travel along smooth paths in quantum mechanics?
  • LukeD
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Graduate How is superfluidity in liquid helium explained by quantum mechanics?
  • superpaul3000
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Graduate Uncertainty Principle and Fourier Transform
  • gareththegeek
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Graduate Average energy of atoms in the Stern–Gerlach experiment
  • Keky
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Graduate Quantum information/symmetry/group theory.
  • barnflakes
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Graduate Why is superposition prinple a first principle in QM
  • kof9595995
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Graduate What does not normalizable ential
  • amrhima
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Graduate Why is Orbital Angular Momentum Quantized in Quantum Mechanics?
  • Amith2006
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Undergrad Electrons Settling to Lower Energy State: How Long Does Light Last?
  • robfrias
  • · Replies 5 ·
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Graduate Central charge and Lorentz Algebra
  • LAHLH
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Graduate Can BEC experiments shed light on the mysteries of quantum gravity?
  • lark
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Graduate Information travel faster than c ?
  • luxiaolei
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Graduate Can we do double slit experiment using quasiparticles?
  • kof9595995
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Graduate Energy of Measurement - Quantum Mechanics
  • Evertje
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Graduate Srednicki Equation 7.7: Explained
  • vaibhavtewari
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Graduate SU(2) symmetric/antisymmetric combination using young tableaux
  • hjlim
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Graduate Can We Model Chess Pieces as Quantum Particles?
  • Bob3141592
  • · Replies 11 ·
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Graduate Double slit experiment, observer effect
  • khkwang
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Graduate Is the Scattering Matrix in Quantum Field Theory Inherently Unitary?
  • RedX
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Graduate Quantum Entanglement: Does Normalisation Matter?
  • pnaj
  • · Replies 8 ·
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Graduate Causality in quantum mechanics and relativity
  • ensabah6
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Graduate Is Every Hermitian Operator Observable?
  • sweet springs
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Graduate Does the Heisenberg Uncertainty Principle make human teleportation impossible?
  • hammertime
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Graduate Dimensionless equation schrodinger with field magnetic
  • pirulito.king
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Graduate Photon propagator in an arbitrary gauge
  • kryshen
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Undergrad Can Two Protons Exist in an Atom's Nucleus Without Neutrons?
  • Mighty_Tesla
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Graduate BRS: The Weyl Vacuums. I. Definition, Geometrical Properties, Symmetries
  • Chris Hillman
  • · Replies 11 ·
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Graduate Srednicki 2.17. How does metric act on Levi Cevita symbol?
  • LAHLH
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Graduate Radiation from free electron with small acceleration
  • DaTario
  • · Replies 18 ·
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Graduate Instantanious Communication possible?
  • Rob060870
  • · Replies 9 ·
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Graduate Waveform produced by an atomic transition
  • hempyelmo
  • · Replies 3 ·
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Graduate Quantum Immortality: Implications of MWI on Death?
  • blah_blah
  • · Replies 6 ·
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Graduate Symmetry factors in Feyman Diagrams
  • vertices
  • · Replies 7 ·
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Graduate Local density of number of photons
  • paweld
  • · Replies 1 ·
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Graduate Sommerfeld quantisation:relation between energy and potential
  • krishna mohan
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Graduate S-orbitals, angular momentum and Heisenberg uncertainty
  • Scraping Rust
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Graduate How can I solve for Equation 2.16 in Srednicki?
  • LAHLH
  • · Replies 3 ·
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Graduate Simplifying Feynman Diagram for Nasty 10 Point Green's Function?
  • vertices
  • · Replies 1 ·
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Graduate The expectation of an expection (relating to Wick's Theorem)
  • vertices
  • · Replies 4 ·
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Graduate Understanding Normalization in Spin Sum: Peskin vs. Kaku and Zee's Approach"
  • nklohit
  • · Replies 1 ·
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Graduate Photon absorption via changing EM field
  • Edi
  • · Replies 1 ·
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Graduate Thought Experiment: Weight of Electrons & Positrons in a Container
  • Raekwon
  • · Replies 13 ·
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Graduate S-Matrix in non-relativistic limit
  • nklohit
  • · Replies 2 ·
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Graduate How Do We Calculate the Composite Spin of a System with Three or More Particles?
  • Xian
  • · Replies 3 ·
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Graduate Quantum Entanglement: Explained with an Example
  • tell_me_why
  • · Replies 4 ·
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Graduate Is there an equivalent of the HUP for spins?
  • nomadreid
  • · Replies 19 ·
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Graduate Electrodynamics question and maybe quantum/classical misunderstanding
  • jfy4
  • · Replies 4 ·
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Undergrad Does a laser experience recoil due to photon momentum?
  • ssope
  • · Replies 46 ·
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Undergrad How is it then when you colide 2 protons
  • clm321
  • · Replies 19 ·
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Graduate Integral involving exponentials and the Time ordering operator
  • vertices
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Undergrad Quantization of Length: Can You Achieve Every Length Between 1" and 2"?
  • Axuality
  • · Replies 7 ·
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Graduate Quantum Mechanical Acceleration Operator: Help Needed
  • jfy4
  • · Replies 9 ·
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Graduate Understanding Spin: Share Your Ideas!
  • luxiaolei
  • · Replies 5 ·
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Graduate Perturbation Theory: Deciphering Missing Lines of Explanation
  • vertices
  • · Replies 5 ·
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Graduate Solving radial wavefunction in odd central potential
  • FunkyDwarf
  • · Replies 2 ·
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Graduate Understanding S-Wave and P-Wave Annihilation
  • fliptomato
  • · Replies 4 ·
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Graduate Bound states of Yukawa potential
  • drummerguy
  • · Replies 1 ·
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Graduate Energy Uncertainty Less For High-Energy Particles?
  • LarryS
  • · Replies 2 ·
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