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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Graduate Are all wave functions with a continuum basis non-normalizable?
- TheCanadian
- · Replies 9 ·
High School Simple proof of Bell's theorem
- jeremyfiennes
- · Replies 95 ·
Undergrad Can delayed choice quantum eraser experiments predict future events?
- eyeseefan
- · Replies 2 ·
Undergrad How Does Environmental Interaction Affect Quantum Decoherence and Localization?
- durant35
- · Replies 2 ·
Graduate Overlap of Ground States in Quantum Field Theory
- hilbert2
- · Replies 5 ·
High School Electron diffraction experiment puzzle
- Glenn G
- · Replies 7 ·
High School Photoelectric effect and metal's delocalised electrons
- Glenn G
- · Replies 6 ·
Graduate Standing wave ridges in photoresist and the nature of photon absorption
- James T Clemens
- · Replies 8 ·
Undergrad Finite difference method with mode-dependent boundary conditions for Schrödinger equation
- aaaa202
- · Replies 1 ·
Undergrad Does the double-slit experiment create path-entangled states
- sciencejournalist00
- · Replies 12 ·
Graduate What is the most general mathematical framework for quantum
- lfqm
- · Replies 5 ·
Undergrad Lorentz invariant phase space measure normalization in QFT
- "Don't panic!"
- · Replies 10 ·
Undergrad Understanding Coherence in Quantum Mechanics
- Sheldon Cooper
- · Replies 3 ·
Undergrad What does it mean -- polarization of a single photon?
- Uriel
- · Replies 22 ·
High School What is the Mass of Photons According to QFT?
- FallenApple
- · Replies 2 ·
High School So Schrodinger's cat is a gambler
- farolero
- · Replies 2 ·
Graduate Spontaneous symmetry breaking - potential minima
- spaghetti3451
- · Replies 2 ·
Undergrad Obtaining Spherical Harmonics to Normalized Angular Wave Functions
- TimeRip496
- · Replies 6 ·
Undergrad Do photons of all energies exist?
- Vibin Narayanan
- · Replies 10 ·
Graduate Quantum Field Theory - Why quantise fields?
- "Don't panic!"
- · Replies 13 ·
High School Gauge Boson Exchange: Do Particles Influence Each Other?
- Vibin Narayanan
- · Replies 3 ·
Undergrad What experiment determined the electron is a dipole?
- LitleBang
- · Replies 3 ·
Undergrad Molecular Hamiltonian - Ammonia
- Konte
- · Replies 2 ·
Undergrad Quantum Mechanics is not a description of reality?
- Clever Penguin
- · Replies 2 ·
Undergrad Does interference require actual measurement or just possibility of measuring?
- greypilgrim
- · Replies 33 ·
Undergrad What is the mechanism behind Hawking radiation?
- Grinkle
- · Replies 26 ·
Graduate What is the true definition of the covariant gamma matrix ##\gamma_{5}##?
- spaghetti3451
- · Replies 7 ·
Undergrad Laser Beam through Calcite crystal = Photon Entanglement?
- fizixfan
- · Replies 2 ·
Graduate Identification of particle and antiparticle in lagrangian
- spaghetti3451
- · Replies 1 ·
Graduate Value of Mexican hat potential
- spaghetti3451
- · Replies 4 ·
Graduate Why Can We Drop Constant Terms in Quantum Field Theory Lagrangians?
- spaghetti3451
- · Replies 1 ·
Undergrad Can spin states be expressed in different bases and what does superposition mean here?
- yeezyseason3
- · Replies 2 ·
Undergrad Particle density in the Unruh effect for an accelerated observer
- asimov42
- · Replies 12 ·
Graduate What are the failed experiments to determine electron's position?
- Shailesh Pincha
- · Replies 7 ·
Undergrad Can Bell's theorem contradict PBR ?
- jk22
- · Replies 3 ·
High School Why is the uncertainty in position equal to the wavelength?
- HermitOfThebes
- · Replies 18 ·
Undergrad Difference between measurement and passing through a gate
- nashed
- · Replies 18 ·
Undergrad Classical vs. Quantum Defintion of Energy in Field Theory
- LarryS
- · Replies 3 ·
Undergrad Why did de Broglie propose that electrons have wave properties?
- Haizreff
- · Replies 2 ·
High School Local teleportation using classical entanglement
- Nicky665
- · Replies 2 ·
High School A non-physicist's question on the double-slit experiment
- Quotidian
- · Replies 20 ·
Graduate Quantum obstacle course changes material from superconductor to insulator
- Electron Spin
- · Replies 1 ·
Undergrad Harmonic oscillator ladder operators
- spaghetti3451
- · Replies 10 ·
Undergrad Why is measure not an accurate term for determining the location of a particle?
- FallenApple
- · Replies 10 ·
High School Teleportation of large objects?
- Emilie0tec
- · Replies 1 ·
Undergrad Higgs Boson, Electrons and Spin
- kent davidge
- · Replies 2 ·
Graduate Do vacuum particles interact with real particles in pilot-wave QFT?
- asimov42
- · Replies 2 ·
Undergrad What Events Create Spooky Electrons in Quantum Mechanics?
- Passionate Eng
- · Replies 8 ·
Insights Interview with physicist David Hestenes
- micromass
- · Replies 13 ·
Graduate What is the purpose of applying a Dirichlet boundary condition?
- bluejay27
- · Replies 1 ·
High School What happens if the observer dies?
- Nektar
- · Replies 3 ·
Undergrad How many orbits are in the hydrogen atom?
- LSMOG
- · Replies 4 ·
Undergrad The Berry Connection and Gauge Invariance in Quantum Systems
- spaghetti3451
- · Replies 4 ·
High School Can you change a quantum particle's spin?
- cj20x2
- · Replies 7 ·
High School Possible for a particle to diffract around a barrier
- rictor
- · Replies 4 ·
Undergrad Is the Concept of a Continuous Real Line Contradicted by Quantum Physics?
- FallenApple
- · Replies 6 ·
Undergrad Commutator of Parity operator and angular momentum
- dyn
- · Replies 6 ·
High School Is the Universe grainy below the Planck Scale?
- CrackerMcGinger
- · Replies 17 ·
Undergrad Integrating imaginary units and operators
- Dean Navels
- · Replies 2 ·
Undergrad SQM vs Pilot Waves - Potential issue with Pilot Waves?
- tomdodd4598
- · Replies 12 ·
Undergrad Why does the Higgs field require a Higgs particle?
- imsmooth
- · Replies 5 ·
Undergrad QFT Feynman Propagator Algebra
- binbagsss
- · Replies 13 ·
Undergrad Exchange of photons inside atoms
- CassiopeiaA
- · Replies 1 ·
Graduate Determining molecular resonance frequencies
- Cloud Wolf
- · Replies 2 ·
Undergrad Virtual Particles and Charge Screening
- David Neves
- · Replies 2 ·
High School Does an electron turn into a positron when hit by a photon?
- Jovian_Dsouza
- · Replies 6 ·
High School Does defining the meter by light speed shift uncertainty to meter measurements?
- RaduAndrei
- · Replies 12 ·
Undergrad Is quantum weirdness really weird?
- Dadface
- · Replies 244 ·
Undergrad Determining if an operator is degenerate
- Physgeek64
- · Replies 4 ·
High School When would a particle's de Broglie wavelength equal the classical EM wavelength?
- rictor
- · Replies 1 ·
Graduate Are All Electrons Created Equal? The Implications of Quantum Field Theory
- catamongpigeon
- · Replies 40 ·
Undergrad Meaning of "c number equations"?
- TheCanadian
- · Replies 2 ·
High School Why does large impact parameter cause small scattering angles in Rutherford scattering?
- Bloopy
- · Replies 4 ·
Undergrad Murray Gell-Mann on Entanglement
- Thecla
- · Replies 421 ·
Undergrad Can a single point in space carry values for all quantum fields simultaneously?
- ftr
- · Replies 37 ·
High School Why does this term always approach 4?
- houlahound
- · Replies 3 ·
Undergrad Eigenstate of two observable operators
- Kavorka
- · Replies 5 ·
Undergrad Berry phase without a magnetic field
- spaghetti3451
- · Replies 2 ·
Undergrad Cosmic Bell Test: 600 yr Old "Freedom of Choice" Loophole
- DrChinese
- · Replies 8 ·
High School Einstein's Photoelectric Equation and its graph
- Bloopy
- · Replies 8 ·
High School Double Slit detectors question
- jacobassett
- · Replies 30 ·
Undergrad Can the expectation of an operator be imaginary?
- Tspirit
- · Replies 2 ·
Undergrad SO(3) rotation of eigenvectors
- spaghetti3451
- · Replies 8 ·
Graduate Feynman diagrams for ##e^{+}e^{-}\rightarrow \mu^{+}\mu^{-}##
- spaghetti3451
- · Replies 10 ·
Undergrad Study for Feynman Diagrams: Beyond Shankar, etc?
- kent davidge
- · Replies 2 ·
Undergrad How do we know which photons are twins in the quantum eraser experiment?
- Tonyant
- · Replies 5 ·
Undergrad Entanglement in QM - Understanding Instant Correlation & Randomness
- GiuseppeP
- · Replies 38 ·
Graduate Spinor Lorentz Transform via Vectors - Cross Product Issue
- bolbteppa
- · Replies 6 ·
Graduate Why General Relativity is non-renormalizable quantum theory?
- tatanacevedo
- · Replies 2 ·
High School Operators 'act on' the wavefunction
- says
- · Replies 4 ·
High School Why is wave function collapse considered surprising or weird?
- abrogard
- · Replies 153 ·
High School Can photons be particles that emit waves rather than both particle and wave?
- MittyWalter
- · Replies 34 ·
Undergrad Confused about emission/absorbtion of photons
- tadasbar
- · Replies 2 ·
Graduate NASA confirms(?) EmDrive - can pilot wave carry momentum?
- jarekduda
- · Replies 1 ·
Undergrad Measuring Spin in the Stern Gerlach Experiment
- klen
- · Replies 3 ·
Undergrad Hermitian Operators in QM
- john t
- · Replies 3 ·
Graduate Why can the ##1##-point correlation function be made to vanish?
- spaghetti3451
- · Replies 6 ·
Undergrad Correlation functions and correlation length
- Frank Castle
- · Replies 15 ·
High School How does Partcle Symmetry affect the way a Particle Behaves?
- ChrisisC
- · Replies 5 ·
Graduate Hermitian properties of the gamma matrices
- spaghetti3451
- · Replies 1 ·