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 Why is the Pauli Exclusion Principle not a force?
- dsanz
- · Replies 101 ·
Undergrad Why do different Lagrangians related by a total derivative give different quantum systems?
- klpskp
- · Replies 10 ·
High School Bose Condensate: The Repulsive Nature and Inability to Penetrate Ceramic
- fanieh
- · Replies 3 ·
Undergrad One Way vs. Entangled Cryptography
- Zafa Pi
- · Replies 5 ·
Undergrad Commutator Properties: [A,B]C+B[A,C]=[A,B](C+B)?
- Kyle Nemeth
- · Replies 2 ·
Undergrad Peres-Horodecki criterion for a 3-qubit system
- MMS
- · Replies 2 ·
Undergrad Proving The Church-Turing-Deutsch Principle
- n01
- · Replies 39 ·
Graduate Why doesn't electron self-energy diverge if photons can be absorbed by other electrons?
- feld
- · Replies 3 ·
High School Build a "full" wave function without data in simple problems
- DoobleD
- · Replies 7 ·
Insights Interview with physicist David J. Griffiths
- Greg Bernhardt
- · Replies 15 ·
High School Is the Heisenberg Uncertainty Principle Equivalent to One Bit of Information?
- Nicky665
- · Replies 5 ·
Undergrad Does the electron field carry information about its charge
- ftr
- · Replies 3 ·
Undergrad Physical significance of nodes?
- Sheldon Cooper
- · Replies 4 ·
Undergrad Will the kinetic energy operator change with a variable shift?
- Konte
- · Replies 3 ·
Graduate How to calculate the Wigner function for an entangled state
- khfrekek92
- · Replies 4 ·
Undergrad How are quantum bits implememted?
- JohnsonJohnson
- · Replies 1 ·
Undergrad Why do we need perturbation theory
- LSMOG
- · Replies 2 ·
Undergrad Qubits: Can We Store Information Again After Read?
- bzt
- · Replies 4 ·
Undergrad Double slit experiment with electrons
- Davephaelon
- · Replies 3 ·
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 ·