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 Finding Simplicity in Summation Expressions
- Final
- · Replies 3 ·
Graduate Why do we describe electron wave functions in 3n-dimensional phase space?
- Marty
- · Replies 9 ·
Graduate Why shift energy by i epsilon in the Feynman propagator
- haushofer
- · Replies 4 ·
Graduate Simple QM Question: Eigenfunctions and Eigenvalues
- h0dgey84bc
- · Replies 9 ·
Graduate Exclusion principle in quantum gasses
- Quant ummm?
- · Replies 1 ·
Undergrad Differing formulae for power emission
- PatF
- · Replies 1 ·
Graduate Eigen function, eigen value, eigen vector
- jason.bourne
- · Replies 2 ·
Graduate Schrodinger Equation and Energy Quantization
- quantumlaser
- · Replies 39 ·
Graduate Question on Time Reversal and Degeneracy
- RedX
- · Replies 1 ·
Undergrad Electron interference in double-slit experiment
- markoX
- · Replies 3 ·
Graduate Can a Pulse Be Shorter Than One Wavelength?
- fisico30
- · Replies 12 ·
Graduate Transpose of Grassmanian variables
- ismaili
- · Replies 1 ·
Graduate QED Lagrangian lead to self-interaction?
- per.sundqvist
- · Replies 138 ·
Graduate Antimatter from time-traveling electrons
- mcmagicman530
- · Replies 3 ·
Graduate Coexistence of QT and Relativity
- dkgolfer16
- · Replies 35 ·
Graduate What do the different l values in D^l(θ) rotation matrices represent?
- Phymath
- · Replies 1 ·
Graduate Why is the helicity of a neutrino unchanged by the weak interaction?
- Final
- · Replies 4 ·
Graduate Why does the Schrödinger equation diverge for wrong energy values?
- arroy_0205
- · Replies 2 ·
Graduate Wave collapse vs. Friis transmission equation
- Antenna Guy
- · Replies 5 ·
Graduate What Is the Significance of Electron Spin in Quantum Mechanics?
- foobar
- · Replies 8 ·
Graduate Quantum Optics: Fock State and Its Meaning for Light
- fisico30
- · Replies 9 ·
Graduate Delta function of a function with multiple zeros
- maverick280857
- · Replies 2 ·
Graduate Applying Riemann-Hilbert Space Curvature to Quantum Mechanics
- Loren Booda
- · Replies 1 ·
Graduate Can Pinholes Alter Photon Path Deduction in Quantum Mechanics Experiments?
- RandallB
- · Replies 29 ·
Graduate Find Min Copies Needed for Certainty of Permuted Qubits w/ General State
- Dragonfall
- · Replies 2 ·
Graduate What are the main areas and problems in current QCD research?
- Bobhawke
- · Replies 2 ·
Graduate Come One, Come All, and Cast Your Vote
- bluestar
- · Replies 3 ·
Graduate Time delay for evanescent wave to spread (photon tunnelling)
- EE.PHY.
- · Replies 1 ·
Graduate Double slit experiment - QM or wave?
- Hydr0matic
- · Replies 45 ·
Graduate Changing the spin of a Quantum particle
- Ikirak
- · Replies 6 ·
Graduate Relation between potential and bound states in Schrodinger equation.
- arroy_0205
- · Replies 1 ·
Graduate How does Wien's Scaling Law unify experimental data in blackbody radiation?
- Narcol2000
- · Replies 1 ·
Graduate Goldstone bosons 1st order phase transition
- Sunset
- · Replies 13 ·
Graduate Quantum Data:Theoretical Requirements
- CJames
- · Replies 3 ·
Undergrad Can effects occur before their causes in quantum experiments?
- BioCore
- · Replies 17 ·
Graduate Why do normalized harmonic oscillator wavefunctions differ between references?
- bluestar
- · Replies 2 ·
Graduate How do Bell inequality tests rule out local hidden variables?
- ScottArizona
- · Replies 5 ·
Graduate What is the main assumption of quantum physics?
- mohamed2020
- · Replies 1 ·
Undergrad How Do Electrons Create an Interference Pattern in the Double Slit Experiment?
- kkapalk
- · Replies 14 ·
Graduate Obama has chosen his VP, the universe has decohered/collapsed
- Count Iblis
- · Replies 3 ·
Graduate Continuing entanglement after first measurement
- Degeneration
- · Replies 1 ·
Undergrad How can light interfere without a medium?
- OwenMc
- · Replies 15 ·
Graduate What is a positive definite Hamiltonian?
- arroy_0205
- · Replies 7 ·
Graduate Conservation of momentum and how to entangle
- thenewmans
- · Replies 1 ·
Graduate References for quantum chromodynamics
- physman88
- · Replies 6 ·
Undergrad Why do physicists need to quantize photons?
- Chaste
- · Replies 4 ·
Graduate Kinetic lagrangian for non-abelian gauge theories
- patrice
- · Replies 7 ·
Graduate How to convert m meter into recoils
- texophist
- · Replies 4 ·
Graduate Can Quantum Entanglement Enable Superluminal Communication?
- Jon_Trevathan
- · Replies 15 ·
Graduate Spontaneous Breaking Local Gauge Symmetry: Hamiltonian Formalism?
- weejee
- · Replies 3 ·
Graduate Best possible test which differentiates qubits
- Dragonfall
- · Replies 3 ·
Graduate If I fire one photon at two slits, what pattern appears on the detector?
- student85
- · Replies 31 ·
Graduate Is the Correct Delta Function for a QED Vertex \(\delta(p+q-k)\)?
- kilokhan
- · Replies 1 ·
Graduate Distribution of speeds in a molecular beam.
- Narcol2000
- · Replies 1 ·
Graduate Uncollapsing a wavefunction (demo in low temp cond matter lab)
- marcus
- · Replies 2 ·
Undergrad Why Does the Photoelectric Effect Eject Electrons from the Innermost Shell?
- eitan
- · Replies 2 ·
Graduate Inserting Feynman Slash Notation in Mathematica
- Shaun Culver
- · Replies 3 ·
Graduate Broken Symmetries (Weinberg p215)
- Final
- · Replies 3 ·
Graduate How did the Dirac equation predict antimatter?
- daveed9
- · Replies 3 ·
Graduate Mean Field Indices in D>4: Modern Proofs
- tirrel
- · Replies 3 ·
Graduate How Does the Euclidean Dirac Operator Connect Quantum Field Theory and Geometry?
- cosmology
- · Replies 1 ·
Graduate Problem understanding a statement in Bose Statistics
- Narcol2000
- · Replies 2 ·
Graduate Quantum mechanics vs general relativity
- michael879
- · Replies 15 ·
Graduate How Does Dimensional Regularization Simplify Integrals in Quantum Field Theory?
- mhill
- · Replies 1 ·
Graduate What happens to qubits if Swap Test fails?
- Dragonfall
- · Replies 1 ·
Graduate Schrodinger's Equation validity for relativistic particles
- turnerre
- · Replies 31 ·
Graduate Klein-Gordan Eqn: Understanding Negative Probabilities
- captain
- · Replies 2 ·
Graduate Diagramatic perturbative expansion of QCD
- Sunset
- · Replies 6 ·
Graduate How Does Einstein's Theory of Relativity Derive the Energy of a Single Photon?
- JayKo
- · Replies 15 ·
Graduate Why does the coupling run only with the choice μ² ∼ s?
- ledamage
- · Replies 1 ·
Graduate Is 'Fuzzy' logic an appropiate Quantum logic ?
- tpm
- · Replies 2 ·
Graduate Quantum particle empirical status
- ShaneS
- · Replies 12 ·
Graduate Particles and Fields – a neverending story
- ledamage
- · Replies 52 ·
Graduate Doesn't QM allow for FTL travel?
- Raap
- · Replies 3 ·
Graduate Field Operators in Klein-Gordon theory
- philipp_w
- · Replies 5 ·
Graduate Whcih Theory Of Quantum Mechanics Is The Right One?
- twoface42
- · Replies 9 ·
Graduate Are scalar electromagnetic waves real or pseudoscience?
- H0T_S0UP
- · Replies 3 ·
Graduate Energy levels in finite 1d well
- stone
- · Replies 1 ·
Graduate Why Irreducibel Representations?
- philipp_w
- · Replies 10 ·
Graduate Can Observing Particles Without Photons Overcome the Uncertainty Principle?
- Nick.M
- · Replies 1 ·
High School Double slit experiment -WHAt is it it showing or proving
- jenzao
- · Replies 41 ·
Graduate Understanding Particle Mass Shells
- captain
- · Replies 2 ·
Graduate Time Propagation: Evaluating "exp(-i*H*t)
- Incognition
- · Replies 1 ·
Graduate Quantum Well Levels: Energy Changes with Depth
- dacs
- · Replies 7 ·
Undergrad What is the effect of gravity on light?
- Azza_-_
- · Replies 14 ·
Graduate Do Polarizers Affect Entangled Photon Beams Differently?
- daniel29208
- · Replies 9 ·
Graduate Graviton and photon point particles in reality
- Landru
- · Replies 1 ·
Graduate Fourier Transform of a wavefunction
- children
- · Replies 2 ·
Graduate DeltaXDeltaP Greater Than or Equal to h/4pi
- C Rob
- · Replies 1 ·
Graduate Could Quantum Time Be Confirmed by the LHC?
- excogitator
- · Replies 2 ·
Graduate Wave/Particle Double Slit Experiment Questions
- The_Animus
- · Replies 10 ·
Graduate How small does sub-atomic universe go?
- ucf-fisher21
- · Replies 2 ·
Graduate Momentum operator as the generator of translations.
- alexepascual
- · Replies 69 ·
Graduate Feyman Diagram - Represent QED model(s)?
- Simone_beet
- · Replies 2 ·
Graduate Two interacting electrons in 1D infinite well
- badphysicist
- · Replies 1 ·
Graduate Entangling Photons: A Brief Overview of Quantum Interference
- thenewmans
- · Replies 4 ·
Graduate Rayleigh one-two photon, dipole approx
- evidenso
- · Replies 1 ·
Graduate GHZ Experiment: Detections vs. Hidden Variables
- trosten
- · Replies 7 ·
Graduate Bellweather grants from FQXi foundation (straws in the quantum gravity wind)
- marcus
- · Replies 6 ·
Undergrad Why do photons and electrons travel at speeds close to c?
- JasonJo
- · Replies 2 ·