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.
Threads
Graduate Dirac notation and conjugate transpose in Sakurai
- Master J
- · Replies 3 ·
Graduate Why the photoelectric cross section decreases with the energy of the photon?
- wdlang
- · Replies 11 ·
Graduate Contextuality and Non-Locality
- audioloop
- · Replies 4 ·
Undergrad Basic question regarding Maxwells distribution
- Rhydo
- · Replies 2 ·
Graduate Relativistic Equation Questions
- CAF123
- · Replies 15 ·
Graduate Is the universe a fermion or a boson?
- bwang8
- · Replies 6 ·
Graduate How is the commutator derived through the general form of expectation value?
- Elekko
- · Replies 17 ·
Graduate Is Degeneracy in Quantum States Equally Probable in Thermodynamic Equilibrium?
- hokhani
- · Replies 3 ·
Graduate Why poles in the propagator correspond to dynamical degrees of freedom
- eoghan
- · Replies 3 ·
Graduate Wave Function Collapse: Observers & Probability in Schrodinger's Cat Experiment
- leonstavros
- · Replies 4 ·
Graduate How do different physics theories describe the nature of time?
- mysearch
- · Replies 19 ·
High School Can anything travel faster than light?
- louisgeorge
- · Replies 6 ·
Graduate Bending Radiation: Heat Pumps and Beating Carnot's Law
- philrainey
- · Replies 4 ·
Graduate The dimensionality of the state space of a quantum system
- jcsd
- · Replies 18 ·
Undergrad What Does Black Light Do to a Blackbody?
- philrainey
- · Replies 4 ·
Graduate Expanding over R and L polarisations
- StevieTNZ
- · Replies 8 ·
Graduate Double slit confusion from observed particle dynamics.
- Sicphys
- · Replies 7 ·
Graduate Do quantum superpositions represent projections from higher dimensions?
- ArtistIC
- · Replies 4 ·
Undergrad General explaination of standard model/particles in general?
- unanimousteen
- · Replies 2 ·
Graduate What is the wave function in the time-independent Schrödinger equation?
- AbsoluteZer0
- · Replies 1 ·
Undergrad Can you measure momentum with a single measurement?
- Fiziqs
- · Replies 14 ·
Graduate Do photons have amplitude or only intensity from photon numbers?
- toneboy1
- · Replies 17 ·
Graduate Time-dependent Schrodinger equation for many particles
- AxiomOfChoice
- · Replies 1 ·
Graduate Solving Schroedinger's equation for Step Potential
- uday1236
- · Replies 2 ·
Graduate A thought experiment (excuse me if I have wrong information, i'm new)
- tracefleeman
- · Replies 9 ·
Graduate Feymman's theory, double slit experiment - Stephen Hawking
- jaumzaum
- · Replies 2 ·
Graduate Trace as a product of operators
- intervoxel
- · Replies 2 ·
Graduate Lasers/lifetime of metastable states on brightness of beam
- CAF123
- · Replies 1 ·
Graduate Eigen functions of momentum operator
- esornep
- · Replies 3 ·
Graduate Phase Factor of Spinors (what they represent)
- lzydesmond
- · Replies 18 ·
Graduate A Pauli and a Dirac electron, momentum density and spin.
- Spinnor
- · Replies 4 ·
Can positive thoughts change water molecules' structure?
- silvercats
- · Replies 2 ·
Graduate Is the radial part of the Laplacian in spherical coordinates Hermitian?
- geoduck
- · Replies 1 ·
Graduate Hyperfine splitting in Hydrogen atom
- DMESONS
- · Replies 1 ·
Graduate Why don't all observables commute in QM?
- San K
- · Replies 6 ·
Graduate HUP and the effects of measuring a particle
- Fiziqs
- · Replies 1 ·
Graduate Applications of Functional Analysis ?
- azari123
- · Replies 1 ·
High School Why do photons have frequency if they're particles?
- madness
- · Replies 20 ·
Graduate What is the Frequency in Einstein's Quantum Expression?
- exmarine
- · Replies 2 ·
Graduate Pair Production: Creating Matter from Light
- LiteHacker
- · Replies 3 ·
Graduate Explanation for uncertainty principal?
- scijeebus
- · Replies 1 ·
Graduate What Are Casimir Operators and Rest Reference Conditions in Particle Physics?
- noamriemer
- · Replies 2 ·
Graduate Why multiply ψ by ψ* to get probability density
- sciboudy
- · Replies 13 ·
Undergrad Plasma Frequency and Work Function
- Bonasa
- · Replies 1 ·
Graduate What is the Nature of Reality?
- Fiziqs
- · Replies 5 ·
Graduate The Multiple Worlds theory- it contradicts itself
- arjunmalhotra
- · Replies 6 ·
Graduate Is the Higgs Field a Key Player in Quantum Decoherence?
- Maui
- · Replies 12 ·
Graduate Newbie question - about Schroedinger's Cat
- studentxlol
- · Replies 10 ·
Graduate Sinha's triple slit experiment and water wave interference
- Fiziqs
- · Replies 2 ·
Graduate Why does the de Broglie equation show λ and v inversely proportional?
- moatasim23
- · Replies 13 ·
Graduate What are topological insulators and the quantum hall effect?
- Ryanzmw
- · Replies 1 ·
Is Our Reality a Simulation?
- silvercats
- · Replies 28 ·
Graduate No need for spooky action at a distance
- Suppaman
- · Replies 31 ·
Graduate Scalar Boson and Quantum Non-locality
- rodsika
- · Replies 1 ·
Undergrad How is the scattering cross section measured?
- wdlang
- · Replies 1 ·
Graduate Existance of ladder operators for a system
- espen180
- · Replies 2 ·
Graduate Do particles interfere with other particles in the double slit experiment?
- Fiziqs
- · Replies 1 ·
Graduate Schrodinger Equation and seperation of variables
- McLaren Rulez
- · Replies 7 ·
Graduate Newbie Question - Double Slit Experiment - 'Interference Patterns'
- SonOfBruze
- · Replies 13 ·
Graduate How do we know it's not some kind of attraction?
- scijeebus
- · Replies 4 ·
Graduate Is double slit experiment the only proof for quantum particles' superposition?
- silvercats
- · Replies 2 ·
Graduate Is quantum gravity a promising field?
- Fizicks1
- · Replies 1 ·
Graduate Problem about quantum environmental decoherence
- rocket123456
- · Replies 13 ·
Graduate Schrödinger and Heisenberg picture
- Kontilera
- · Replies 4 ·
Graduate How did Schrödinger's cat end up neither dead nor alive until observed?
- silvercats
- · Replies 25 ·
Graduate Why is the first type bessel function called first?
- wdlang
- · Replies 1 ·
Graduate How does the Schrödinger equation handle split wave-functions and blocked paths?
- San K
- · Replies 10 ·
Graduate Questions about properties of wave-functions
- San K
- · Replies 21 ·
Graduate What Else Splits in Single Particle Interference Experiments?
- San K
- · Replies 2 ·
Graduate Is any energy required to change the phase of a wave-function?
- San K
- · Replies 1 ·
Graduate 3-fold degeneracy: what is it?
- gioialorusso
- · Replies 2 ·
Graduate What Are Fermions and Bosons in the Meson Quark Model?
- Flavia
- · Replies 4 ·
Graduate Quantum well laser diodes - Operation and design
- manueldois
- · Replies 3 ·
Graduate Superposition principle and continuity
- sciboudy
- · Replies 5 ·
Undergrad Can the Photoelectric Effect Cause Metal Oxidation in a Vacuum?
- mihir23
- · Replies 2 ·
Graduate Renormalizing solutions of the Klein-Gordon equation
- nonequilibrium
- · Replies 2 ·
Graduate Quantum mechanics of hydrogen and many-electron systems
- Mendeleeff
- · Replies 2 ·
Graduate FermiDirac-BoseEinstein-Boltzman derivation
- Morgoth
- · Replies 1 ·
Undergrad How close must the wavelength of a photon be for an atom to absorb it?
- jailbait
- · Replies 2 ·
Graduate Superposition and Pauli's principle
- Mukilab
- · Replies 7 ·
Graduate Answer: What is Atom Spin: Physical or Property?
- Mukilab
- · Replies 7 ·
Graduate Visualisation in Quantum mechanics
- CAF123
- · Replies 5 ·
Graduate Causality in quantum mechanics
- tenchotomic
- · Replies 13 ·
Graduate Eigenfunction vs wave function
- Flavia
- · Replies 4 ·
Graduate Photons emitted by an accelerated charge
- Dickfore
- · Replies 6 ·
Graduate Brain freeze on Dirac EQ v. Dirac Hamiltonian
- jollyredgiant
- · Replies 7 ·
Graduate The Higgs field and the aether
- DaveHump3
- · Replies 3 ·
Graduate Higgs field and General Relativity
- DaveHump3
- · Replies 2 ·
Graduate Principal Quantum number: n to infinity?
- CAF123
- · Replies 4 ·
Graduate Quantum numbers (free particles)
- xz5x
- · Replies 2 ·
Graduate Grassmann variables and functional derivatives
- Einj
- · Replies 2 ·
Graduate Equation 2.33 in Peskin & Schroeder, divergent commutator terms
- aleazk
- · Replies 1 ·
Graduate Position vector r and uncertainty principle
- MHD93
- · Replies 4 ·
Graduate Uncertainty principle accuracy
- kapitan90
- · Replies 10 ·
Graduate Do spin-aligned electrons produce the same diffraction pattern as unpolarised electrons?
- cygnet1
- · Replies 2 ·
Undergrad Does a gamma ray photon have less energy than a radiowave photon?
- MegaDeth
- · Replies 17 ·
Graduate Why does confining a particle to a region give zero position uncertainty?
- CAF123
- · Replies 5 ·
Graduate Why does EPR predict binary polarization outcomes for correlated photons?
- Tomer
- · Replies 13 ·
Undergrad If the bohr model of the atom is correct
- Michio Cuckoo
- · Replies 23 ·
Graduate How to explain determinism and why QM seems counterintuitive
- HJ Farnsworth
- · Replies 25 ·