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.
Sub-forums
Threads
Graduate Classical wavelength versus wavefunction
- idea2000
- · Replies 1 ·
Graduate Exotic particles from Casimir?
- nomadreid
- · Replies 1 ·
Graduate Linear superposition. Measurments.
- LagrangeEuler
- · Replies 3 ·
Graduate Why does excited population scale linearly with laser intensity in spectroscopy?
- photon stew
- · Replies 7 ·
Graduate How do you rotate an electron 360 degrees?
- dsoodak
- · Replies 14 ·
Graduate How Does the Second Quantized Field Operator Act on a Two-Fermion Wave Function?
- Einj
- · Replies 2 ·
Graduate Casimir plates prevent photon existence only perpendicular to them?
- Edi
- · Replies 6 ·
Graduate Classic Oscillator: Understanding Matrix Form with Shankar
- chimay
- · Replies 3 ·
Graduate Quantum States and ladder operator
- kashokjayaram
- · Replies 13 ·
Graduate Entangled photons in double slit experiment
- 0xDEAD BEEF
- · Replies 5 ·
Graduate Are coordinate operators Hermitian?
- Heisenberg
- · Replies 3 ·
Graduate Commutation relation to find Sx, Sy
- M. next
- · Replies 7 ·
Graduate Acceleration. Infinite potential well.
- LagrangeEuler
- · Replies 4 ·
Graduate Why Do We Need Complex Wavefunction in Quantum Mechanics?
- wasi-uz-zaman
- · Replies 6 ·
Graduate Hydrogen probability distribution
- unscientific
- · Replies 4 ·
Graduate Expand ψ(o) in terms of eignestates
- M. next
- · Replies 1 ·
Graduate Trouble replicating a calculation in Silicon Nanoelectronics
- Achmed
- · Replies 6 ·
Graduate Why does Re(iλ⟨ø|ψ⟩) = Im(⟨ø|ψ⟩) for unitary operators?
- M. next
- · Replies 2 ·
Graduate What are the matrix elements of the angular momentum operator?
- CrimsonFlash
- · Replies 5 ·
Graduate Bra and Ket Representation in Dual Hilbert Space
- wasi-uz-zaman
- · Replies 3 ·
Graduate Is a state space with indistinguishable particles a quotient? Of what?
- andrewkirk
- · Replies 7 ·
Undergrad Recreating double slit experiment without laser
- Commando Spaz
- · Replies 4 ·
Graduate Uncertainties in Srednicki's Book
- JILIN
- · Replies 9 ·
Graduate Uncertainty principle leads to superlumina ?
- for_Higgs
- · Replies 2 ·
Graduate The uncertainty operator and Heisenberg
- dyn
- · Replies 3 ·
Undergrad Why do some nuclear spins align against the external magnetic field in NMR?
- nickypoo
- · Replies 12 ·
Graduate Understanding Angular Momentum States and Clebsh-Gordan Coefficients
- spookyfish
- · Replies 4 ·
Graduate Matrix of the force on a two-level atom
- Carnot
- · Replies 2 ·
Graduate Interpreting Wavefunction in Quantum Mechanics
- wasi-uz-zaman
- · Replies 2 ·
Graduate Can a photon detected at emission be treated as real rather than virtual?
- johne1618
- · Replies 6 ·
Graduate Does a pulsed laser in a Casimir cavity trigger the dynamic Casimir effect?
- jaiii
- · Replies 1 ·
Graduate Time independent wave function vs the initial wave function
- iScience
- · Replies 1 ·
Graduate Are all selfadjoint operators in quantum mechanics bounded?
- hitche
- · Replies 6 ·
Undergrad What does combining mean in second harmonic generation?
- eliotsbowe
- · Replies 5 ·
Undergrad Is Schrodinger's cat experiment a paradox?
- rede96
- · Replies 72 ·
Graduate Wave function simplification in relativistic coordinates?
- sciencegem
- · Replies 4 ·
Graduate Harmonic oscillator Hamiltonian.
- Catflap
- · Replies 13 ·
Graduate Asymptotic properties of Hydrogen atom wave function
- andrewkirk
- · Replies 3 ·
Graduate Does this equality have a name?
- M. next
- · Replies 2 ·
Graduate Expanding delta variations in Euler-Lagrange field theory derivation
- chuchi
- · Replies 2 ·
Graduate Delayed Choice Eraser with dispersion pattern controlled detectors
- Devedander
- · Replies 2 ·
Graduate Entanglement and interference effects
- ddd123
- · Replies 20 ·
Graduate Joint Number state switching operator?
- Gwinterz
- · Replies 4 ·
High School Uncertainty principle and momentum
- shreder
- · Replies 66 ·
Graduate Finding Hydrogen eigenfunction u(2,0)
- unscientific
- · Replies 4 ·
Graduate Are photons the antiparticle of itself?
- PhotonicBoom
- · Replies 11 ·
Graduate To get the complete Radial Wavefunction, why do we multiply by Y(l,m)?
- unscientific
- · Replies 5 ·
Graduate Klein Gordon ret. Greens function on closed form
- center o bass
- · Replies 1 ·
Graduate Peskin and Schroeder derivation of Klein-Gordon propagator
- chern
- · Replies 2 ·
Graduate Is the real world mostly collapsed?
- batmanandjoker
- · Replies 7 ·
Graduate Helicity and the Uncertainity Principle
- Trifis
- · Replies 10 ·
Graduate Preferred Basis and Superposition
- Cp3
- · Replies 69 ·
Graduate Drawing a Feynman Diagram: Lagrangian Basics
- daymio
- · Replies 2 ·
Graduate Physical meaning of probability density
- Absentee
- · Replies 3 ·
Graduate Hydrogen atom: potential well and orbit radii
- shallowbay
- · Replies 2 ·
Graduate Why does ψ have a ghost number of -1 in BRST symmetry?
- ndung200790
- · Replies 9 ·
Graduate Trace of the spin matrix of spin-1
- Chenkb
- · Replies 4 ·
Undergrad Conceptual Question regarding Uncertainty Principle
- lee_sarah76
- · Replies 1 ·
Graduate Why can we divide by zero in separation of variables for PDEs?
- ChrisVer
- · Replies 6 ·
Graduate HUP and Rest Mass of Electrons
- anorlunda
- · Replies 4 ·
Undergrad Why doesn't Bohr assume electrons are stationary instead of orbiting?
- adoion
- · Replies 14 ·
Graduate Why anyons can't be described by a wave function
- wdlang
- · Replies 2 ·
Graduate Why are Microwaves Better for Quantum Info Stability?
- Hazzattack
- · Replies 8 ·
Graduate How are quantum gates physically implemented in hardware?
- nomadreid
- · Replies 8 ·
Graduate When can the exchange interaction be neglected?
- wdlang
- · Replies 1 ·
Graduate Probability and probability amplitude
- phyky
- · Replies 5 ·
Graduate Why do we use normalization twice in quantum mechanics?
- fuserofworlds
- · Replies 3 ·
Graduate Easy way to get the expectation value of momentum squared?
- chi-young
- · Replies 1 ·
Graduate Do the quantum effects we observe in visible light occur in all wave
- llstanfield
- · Replies 6 ·
Graduate Probability of an entanglement state
- phyky
- · Replies 2 ·
Graduate Problem on Heisenberg's Uncertainty Principle
- acme036
- · Replies 14 ·
Graduate Physical observables, locality, and a preferred basis
- electroweak
- · Replies 12 ·
Graduate Why is electron spin treated as fundamentally non-classical?
- MadRocketSci2
- · Replies 3 ·
Graduate Orthonormality of a complete set of eigenvectors
- burakumin
- · Replies 21 ·
Graduate Does Heisenberg apply to a collapsed wavefunction?
- T'Pau
- · Replies 32 ·
Graduate Electromagnetic waves with regard to photons
- kmm
- · Replies 15 ·
Graduate Relationship between a field and its quanta
- wotanub
- · Replies 2 ·
Graduate Does decay of particles give evidence of time being real?
- skeleton
- · Replies 9 ·
Graduate Coupling of spin to an electric field
- Asaba E
- · Replies 5 ·
Graduate Could a Type-1 and Type-2 Superconductor Oscillator Work?
- goran d
- · Replies 1 ·
Undergrad Excitation to higher energy levels
- Chemist@
- · Replies 7 ·
Graduate How is the electron wavefunction determined?
- Saado
- · Replies 5 ·
Graduate Solving the Shroedinger equation for a harmonic oscillator potential
- user3
- · Replies 5 ·
Graduate Why transition rate independent of time in perturbation theory?
- geoduck
- · Replies 10 ·
Graduate Dividing line between QM and CM?
- protoplast3r
- · Replies 20 ·
Graduate Brian Cox and the Pauli Exclusion Principle
- Morberticus
- · Replies 82 ·
Graduate How is spin measured experimentally ?
- xortdsc
- · Replies 3 ·
High School The uncertainty when measuring time
- Quarlep
- · Replies 4 ·
Graduate How are transistors and QM tied
- batmanandjoker
- · Replies 5 ·
Graduate Calculating Probability Current for Free Particles
- petera88
- · Replies 1 ·
Graduate Does Dirac Notation Determine Quantum States Uniquely?
- mkarydas
- · Replies 1 ·
Undergrad Sommerfeld model and fine spectral lines
- Absentee
- · Replies 3 ·
Graduate Spin angular momentum of a spin-1 particle
- liometopum
- · Replies 4 ·
Graduate Entanglement, entropy and photon energy
- San K
- · Replies 7 ·
Graduate Can a Wavefunction Change State After Collapse with Disturbance?
- andrewthorn
- · Replies 1 ·
Graduate Quantum levitation and quantum locking applications
- Moogroo
- · Replies 3 ·
Graduate Can Single Photons Bend When They Hit a Material?
- Choisai
- · Replies 2 ·
Graduate Why doesn't Wick's theorem allow mixed boson-fermion propagators?
- ndung200790
- · Replies 1 ·
Graduate Do atoms generally exhibit superposition when not isolated?
- batmanandjoker
- · Replies 20 ·
Graduate Completeness relation in degenerate perturbation theory equations 658-661
- xdrgnh
- · Replies 2 ·