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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Undergrad Name of Circular Standing Wave in Geometry
- dm164
- · Replies 1 ·
Undergrad Most basic double slit experiment question
- rasp
- · Replies 17 ·
Graduate How do you solve bound state problems in quantum field theory?
- Prathyush
- · Replies 1 ·
Graduate Invariance of Pauli-matrices under rotation
- NewGuy
- · Replies 3 ·
Graduate Coordinate transformation and conformal transformation?
- ismaili
- · Replies 7 ·
Graduate Expectation Values and Operators
- Nezva
- · Replies 9 ·
Graduate Significance of Commutation Relations
- ian2012
- · Replies 6 ·
Graduate Why doesn't Hydrogen have the same wave functions as Helium
- conway
- · Replies 33 ·
Graduate What does force constant mean for each vibrational mode in polyatomic molecules?
- Rajini
- · Replies 5 ·
Graduate Uncertainity Principle , particles and antiparticles
- bpm_vns19
- · Replies 6 ·
Graduate On-shell renormalization (Srednicki ch31)
- LAHLH
- · Replies 2 ·
Graduate Analogy of casimir effect with moving boats
- meichenl
- · Replies 2 ·
Graduate Why does cavity energy density equal emitted black body radiation?
- ibc
- · Replies 7 ·
Graduate Is There a Calculation Error in Wikipedia's Helium Atom Energy Formula?
- conway
- · Replies 2 ·
Graduate Understanding Ladder Operators
- Nezva
- · Replies 8 ·
Graduate Can a single light wave be split multiple times using quantum mechanics?
- Sea Cow
- · Replies 7 ·
Graduate Atomic Interactions with External EM Fields
- Qubix
- · Replies 3 ·
Graduate Can electrons cross radial nodes in hydrogen orbitals?
- justsof
- · Replies 5 ·
Undergrad Classical Physcics VS Quantum Physics
- TheAkuma
- · Replies 7 ·
Graduate Hidden variables, Bell's theorem, etc
- DeShark
- · Replies 5 ·
Graduate Two electrons in a potential well
- conway
- · Replies 20 ·
Graduate Angular momentum (L) in z-axis of hydroxyl radical
- Nezva
- · Replies 16 ·
Graduate Do physicists agree that unified field exists ?
- PatentLawyer
- · Replies 2 ·
Graduate Why do precise hydrogen atom energy eigenvalues not violate the uncertainty principle?
- rtal
- · Replies 17 ·
Graduate Why doesn't J_+J_-J_+ simplify by cancellation?
- Nusc
- · Replies 15 ·
Graduate A Quantum Mechanical model of measurement
- peteratcam
- · Replies 26 ·
Graduate What Does a Complex Momentum Value Indicate in Quantum Mechanics?
- intervoxel
- · Replies 7 ·
Graduate Semiclassical quantization rules and Langer's modification
- funduk89
- · Replies 1 ·
Graduate Do Point-Particles Truly Lack Spatial Extension?
- FredMadison
- · Replies 7 ·
Graduate Why Did We Shift from Electron Orbitals to Electron Clouds?
- alan.b
- · Replies 57 ·
Graduate Can Electron Spin Affect Current Flow?
- DrMarioworld1
- · Replies 1 ·
Graduate Can the Stern-Gerlach experiment accurately measure electron spin?
- cragar
- · Replies 18 ·
Graduate Solving Antisymmetric Part of Grassman Numbers Sum
- LAHLH
- · Replies 1 ·
Graduate 2d Wavepacket in relativistic QM
- pitfall
- · Replies 3 ·
Graduate Notation question: partial derivative with arrow
- redrzewski
- · Replies 3 ·
Undergrad Difference between particle physics and quantum physics
- shreaks4u
- · Replies 8 ·
Graduate Pseudospectral method vs spectral method
- Winzer
- · Replies 2 ·
Graduate What does it mean when a direct product appears in an exponent?
- Nusc
- · Replies 10 ·
Graduate Definition of time-ordered product for Dirac spinors
- sith
- · Replies 1 ·
Graduate Is light really a particle or a wave?
- JK423
- · Replies 10 ·
Graduate What Are Mesoscopic Cat States and Their Superpositions?
- kexue
- · Replies 1 ·
Graduate Where can I find perturbation theory formulas up to fourth order?
- jeffreydk
- · Replies 3 ·
Graduate Understanding Energy and Spin Interactions in the Ising Model
- iking
- · Replies 4 ·
Graduate Why is a dipole neutral if it has two charges?
- Godwin Kessy
- · Replies 5 ·
Graduate Point symmetry group matrix representations
- torehan
- · Replies 5 ·
Graduate Finding the Result of (a+a#)^n
- mkbh_10
- · Replies 1 ·
Graduate What happens to Entangled Photons after a polarizing beamsplitter (PBS)?
- DrChinese
- · Replies 23 ·
Graduate Galilean Algebra in the low velocity limit of Poincare Algebra (Weinberg vol 1)
- maverick280857
- · Replies 5 ·
Graduate Perturbations to all orders (Srednicki ch19)
- LAHLH
- · Replies 2 ·
Graduate What's the (Electron) Frequency, Kenneth?
- gareththegeek
- · Replies 33 ·
Graduate How Do Photons Carry Electromagnetic Force?
- Sgt. Pasteur
- · Replies 6 ·
Graduate Quantum teleportation implications
- GeorgCantor
- · Replies 2 ·
Graduate What Energy is Released at the Moment of Death?
- crazygoodvibe
- · Replies 2 ·
Graduate Degeneracy of the 3d harmonic oscillator
- mavyn
- · Replies 12 ·
Graduate Quantum Physics and Black holes
- fcb
- · Replies 2 ·
Graduate Matrix element <j m | S²₊ |j m > in Sakurai 3.5.37
- Nusc
- · Replies 3 ·
Graduate No info transferred means SR and Entanglement do not conflict
- thenewmans
- · Replies 3 ·
Graduate Quantum Entanglement - electron spins
- rt_c
- · Replies 2 ·
Graduate Why take FINITE time for an electron to observe a photon?
- luxiaolei
- · Replies 13 ·
Graduate What happens if two electrons collide?
- titanseas
- · Replies 1 ·
Graduate Degenerate Fermi Gas: Why is it Called Degenerate?
- mkbh_10
- · Replies 3 ·
Graduate Why do particles travel along smooth paths in quantum mechanics?
- LukeD
- · Replies 3 ·
Graduate How can superfluid helium have zero and non-zero viscosity simultaneously?
- superpaul3000
- · Replies 2 ·
Graduate Uncertainty Principle and Fourier Transform
- gareththegeek
- · Replies 2 ·
Graduate Average energy of atoms in the Stern–Gerlach experiment
- Keky
- · Replies 2 ·
Graduate Quantum information/symmetry/group theory.
- barnflakes
- · Replies 5 ·
Graduate Why is superposition prinple a first principle in QM
- kof9595995
- · Replies 16 ·
Graduate What does not normalizable ential
- amrhima
- · Replies 5 ·
Graduate Why is Orbital Angular Momentum Quantized in Quantum Mechanics?
- Amith2006
- · Replies 1 ·
Undergrad Electrons Settling to Lower Energy State: How Long Does Light Last?
- robfrias
- · Replies 5 ·
Graduate Central charge and Lorentz Algebra
- LAHLH
- · Replies 4 ·
Graduate Can BEC experiments give insight into quantum gravity?
- lark
- · Replies 4 ·
Graduate Information travel faster than c ?
- luxiaolei
- · Replies 5 ·
Graduate Can we do double slit experiment using quasiparticles?
- kof9595995
- · Replies 10 ·
Graduate Energy of Measurement - Quantum Mechanics
- Evertje
- · Replies 2 ·
Graduate How is Srednicki equation 7.7 a shift by constant?
- vaibhavtewari
- · Replies 7 ·
Graduate SU(2) symmetric/antisymmetric combination using young tableaux
- hjlim
- · Replies 3 ·
Graduate Can We Model Chess Pieces as Quantum Particles?
- Bob3141592
- · Replies 11 ·
Graduate Double slit experiment, observer effect
- khkwang
- · Replies 2 ·
Graduate Is the Scattering Matrix in Quantum Field Theory Inherently Unitary?
- RedX
- · Replies 8 ·
Graduate Quantum Entanglement: Does Normalisation Matter?
- pnaj
- · Replies 8 ·
Graduate Causality in quantum mechanics and relativity
- ensabah6
- · Replies 7 ·
Graduate Is Every Hermitian Operator Observable?
- sweet springs
- · Replies 58 ·
Graduate Does the Heisenberg Uncertainty Principle make human teleportation impossible?
- hammertime
- · Replies 31 ·
Graduate Dimensionless equation schrodinger with field magnetic
- pirulito.king
- · Replies 3 ·
Graduate Photon propagator in an arbitrary gauge
- kryshen
- · Replies 5 ·
Undergrad Can Two Protons Exist in an Atom's Nucleus Without Neutrons?
- Mighty_Tesla
- · Replies 1 ·
Graduate Weyl vacuums: definition, geometric properties and symmetries
- Chris Hillman
- · Replies 11 ·
Graduate Srednicki 2.17. How does metric act on Levi Cevita symbol?
- LAHLH
- · Replies 4 ·
Graduate Radiation from free electron with small acceleration
- DaTario
- · Replies 18 ·
Graduate Instantanious Communication possible?
- Rob060870
- · Replies 9 ·
Graduate Waveform produced by an atomic transition
- hempyelmo
- · Replies 3 ·
Graduate Quantum Immortality: Implications of MWI on Death?
- blah_blah
- · Replies 6 ·
Graduate Symmetry factors in Feyman Diagrams
- vertices
- · Replies 7 ·
Graduate Local density of number of photons
- paweld
- · Replies 1 ·
Graduate Sommerfeld quantisation:relation between energy and potential
- krishna mohan
- · Replies 2 ·
Graduate S-orbitals, angular momentum and Heisenberg uncertainty
- Scraping Rust
- · Replies 5 ·
Graduate How can I solve for Equation 2.16 in Srednicki?
- LAHLH
- · Replies 3 ·
Graduate Simplifying Feynman Diagram for Nasty 10 Point Green's Function?
- vertices
- · Replies 1 ·
Graduate The expectation of an expection (relating to Wick's Theorem)
- vertices
- · Replies 4 ·