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
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 Determining Electron Dipole: Experiments & Results
- LitleBang
- · Replies 3 ·
Undergrad Molecular Hamiltonian - Ammonia
- Konte
- · Replies 2 ·
Undergrad Quantum Mechanics is not a description of reality?
- Clever Penguin
- · Replies 2 ·
Undergrad What destroys interference: Possibility or actual measurment?
- 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 Understanding Spin Basis & Representation in Modern Physics | Explained
- yeezyseason3
- · Replies 2 ·
Undergrad Unruh effect, temperature and particle density....
- 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 Question about the deBroglie hypothesis
- 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 QFT as pilot-wave theory - one more time....
- asimov42
- · Replies 2 ·
Undergrad What Events Create Spooky Electrons in Quantum Mechanics?
- Passionate Eng
- · Replies 8 ·
Insights Interview with a Physicist: David Hestenes - Comments
- 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 existence of 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 Meter Defined by Speed of Light: Uncertainty of Measurement
- RaduAndrei
- · Replies 12 ·
Undergrad Is quantum weirdness really weird?
- Dadface
- · Replies 244 ·
Undergrad Determining if an operator is degenerate
- Physgeek64
- · Replies 4 ·
High School De Broglie Wavelength & Classical EM Wavelength Comparison
- 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 Doubt regarding Rutherford's Alpha Scattering Experiment and Impact Parameter
- Bloopy
- · Replies 4 ·
Undergrad Murray Gell-Mann on Entanglement
- Thecla
- · Replies 421 ·
Undergrad Is the QFT field real or just a mathematical tool?
- 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 Unraveling the Quantum Eraser Mystery
- 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 What Is Surprising About Wave Function Collapse?
- abrogard
- · Replies 153 ·
High School Photon-Wave Duality: Why can't they be separated?
- 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 ·
Graduate EPFL's claim about wave particle duality
- Ranvir
- · Replies 4 ·
Undergrad Explanation for the Quantum Measurement Problem?
- pittsburghjoe
- · Replies 10 ·
High School Re-Preparing vs Perturbing Quantum States: Understanding the Difference
- bluecap
- · Replies 3 ·
Undergrad Can particles exist without duality?
- pittsburghjoe
- · Replies 10 ·
High School Double slit question, rotating polarizers...
- mister mishka
- · Replies 4 ·
Undergrad Why Is the Probability of Finding a Particle in a Position Eigenstate Zero?
- bluecap
- · Replies 38 ·
Graduate Does an infinitesimal generator of acceleration exist?
- quickAndLucky
- · Replies 3 ·
Graduate What is the Lorentz Transformation for Spinor Indices of the Weyl Operator?
- spaghetti3451
- · Replies 4 ·
Graduate Lorentz transformation of field with components
- ChrisVer
- · Replies 2 ·
Graduate What is faster, Gravity or "Spooky Action" at a distance?
- fieldofforce
- · Replies 3 ·
Undergrad Gauge invariance of momentum of charged particle
- spaghetti3451
- · Replies 5 ·
Graduate Adiabatic process - quantum mechanics and thermodynamics
- spaghetti3451
- · Replies 14 ·
Undergrad Phase factors of eigenstates in time-dependent Hamiltonians
- spaghetti3451
- · Replies 1 ·