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.
Sub-forums
Threads
Graduate Stupid question on anomalous magnetic moment of the electron
- paolorossi
- · Replies 7 ·
Graduate Calculating the state for Helium
- randomafk
- · Replies 1 ·
Graduate Observables commute and time operator
- CAF123
- · Replies 5 ·
Graduate How does flux get trapped in superconductors during magnetic levitation?
- cartik
- · Replies 2 ·
Graduate How does molecular vibration create a wave function that affects other particles?
- nukeman
- · Replies 4 ·
Graduate Proof of Entangled Particles being Indetermined
- pinkumbra
- · Replies 1 ·
Graduate Dirac Notation, Observables, and Eigenvalues, OH MY
- Chelsea S
- · Replies 16 ·
Graduate Energy-time uncertainty for a photon with known frequency and arrival time
- bgq
- · Replies 8 ·
Graduate Potential Well - a theoretical question
- JJHK
- · Replies 1 ·
Graduate HUP in QFT and QM:virtual particles
- haushofer
- · Replies 43 ·
Graduate Everyday analogy why hidden variables can’t explain entanglement
- dyb
- · Replies 5 ·
Graduate Questions about Free Will Theorem
- exponent137
- · Replies 1 ·
Graduate What happens to the continuity of wave function
- amalmirando
- · Replies 16 ·
Graduate Treating Mass as a perturbation
- Sekonda
- · Replies 2 ·
Undergrad Classical physics vs quantum physics
- jd12345
- · Replies 1 ·
Graduate Derivation of current density in quantum mechanics
- Lojzek
- · Replies 8 ·
Graduate Convergence of Atomic Orbitals 2s and 2p with high Z number
- shihabdider
- · Replies 1 ·
Graduate Quantum tunnelling and black holes
- AdamBenHamo
- · Replies 2 ·
Graduate Gravitational/Electrostatic self-interactions of wave function
- O'Fearraigh
- · Replies 1 ·
Graduate How photoelectric effect shows particulate nature of light?
- Punch
- · Replies 2 ·
Graduate How to prove probability current density equals velocity times wavefunction squared
- einstein1921
- · Replies 7 ·
Graduate Why is hydrogen stable but lepton pairs aren't?
- Hetware
- · Replies 5 ·
Graduate Estimate decoherence time and length?
- athenee
- · Replies 2 ·
Graduate Stupid question on the qed renormalization
- paolorossi
- · Replies 2 ·
Graduate Quantised energy of a confined system
- CAF123
- · Replies 6 ·
Graduate Energy transfer during photon interaction
- San K
- · Replies 11 ·
Graduate Deriving tunneling probability from the Schrödinger equation
- paulzhen
- · Replies 5 ·
Graduate Can We Measure Velocity with Zero Uncertainty?
- IWantToLearn
- · Replies 27 ·
Graduate Quantum transistors in aircraft aileron control systems
- scumhearted
- · Replies 4 ·
Graduate Why does a particle have many de Broglie waves in a wave packet?
- cartik
- · Replies 4 ·
Graduate Exponental Tunnelling Factor (Electron Microscope)
- ZedCar
- · Replies 1 ·
Graduate Spontaneous vs Stimulated Emission
- center o bass
- · Replies 4 ·
Graduate Some questions about Vibration and Quantum Physics(Pretty simple I think)
- nukeman
- · Replies 13 ·
Graduate Why average values equal operator expectation values in quantum mechanics
- Aziza
- · Replies 5 ·
Graduate What causes the repulsion between an electron and proton in the hydrogen atom?
- azaharak
- · Replies 16 ·
Graduate Complete sets and eigenvalues question
- VortexLattice
- · Replies 3 ·
Graduate Tackling the middle ground of quantum mechanics
- DiracPool
- · Replies 11 ·
High School How do you build a double-slit experiment at home?
- This Guy <-
- · Replies 20 ·
Graduate Classical vs Quantum mechanics
- Laptu
- · Replies 7 ·
Graduate QM Puzzle: Can One Particle Have Multiple States?
- aaronsky12
- · Replies 9 ·
Graduate Calculating <p>_c for Charge-Conjugated Dirac Spinor
- qinglong.1397
- · Replies 10 ·
Graduate Heisenberg picture manifests Lorentz invariance?
- cosmic dust
- · Replies 2 ·
Graduate Quantum vacuum nothing or sea of energy
- osman ibn ali
- · Replies 1 ·
Graduate How to interpret the field function Φ in QFT?
- yicong2011
- · Replies 31 ·
Graduate PBR no-go theorem: experimental test of epistemic vs ontic ψ
- bohm2
- · Replies 12 ·
Graduate Path integral measure in Fourier space transformation
- naele
- · Replies 4 ·
Graduate QFT Question: What is meant by dipole form ?
- spooky51
- · Replies 2 ·
Graduate Energy Level Transitions, transition time for e- to change energy states in atom
- Albertgauss
- · Replies 11 ·
Graduate How is Eq. 31 Derived in the Foldy Wouthuysen Paper?
- kbarger
- · Replies 5 ·
Graduate Angular momentum ladder operators and state transitions
- JeremyEbert
- · Replies 5 ·
Graduate Why won't this information sending work?
- bob900
- · Replies 5 ·
Graduate What causes superpositions to collapse when particles are observed?
- Mukilab
- · Replies 13 ·
Graduate Understanding Group Velocity for Wave Packets in a 1-D Particle in Box
- hokhani
- · Replies 1 ·
Graduate Feynman Diagrams: Does Distance Affect Electromagnetic Interaction?
- big_bounce
- · Replies 2 ·
Graduate What is a virtual photon and how is it used in quantum field theory?
- big_bounce
- · Replies 6 ·
Graduate Entangled particles and relativity
- DrZoidberg
- · Replies 17 ·
Graduate Confusion (8) from Weinberg's QFT.(Lippmann-Schwinger eqn)
- kof9595995
- · Replies 5 ·
Graduate Transformation properties of derivative of a scalar field
- ianhoolihan
- · Replies 40 ·
Graduate So, does God play dice with the Universe or not?
- esmeralda4
- · Replies 18 ·
Graduate Wavefunction collapse and antisymmetry
- Amok
- · Replies 7 ·
Graduate Phase and Gauge Transformations
- unchained1978
- · Replies 11 ·
Graduate Conceptual underpinning(s) of the QM projection postulate
- ThomasT
- · Replies 31 ·
Graduate Critique This Simple Faster Than Light Mechanism - Possible?
- Theheretic
- · Replies 3 ·
Graduate What is the Origin of Spin 1/2 in Quantum Field Theory?
- cabrera
- · Replies 12 ·
Graduate What does electron spin mean and how does it affect atomic orbitals?
- DiracPool
- · Replies 2 ·
Graduate Understanding energy transfer during the process of entanglement
- San K
- · Replies 13 ·
Graduate Gravitational Field Paradox Explanation?
- Theheretic
- · Replies 9 ·
Graduate Does hamiltonian/energy eigenstate always exist?
- kokolovehuh
- · Replies 4 ·
Graduate Why are the only possible values of an operator its eigenvalues?
- randomafk
- · Replies 2 ·
Graduate Can a penny tunnel through steel if shot enough times?
- uperkurk
- · Replies 7 ·
Graduate A simple definition to Non-Relativistic Quantum mechanics?
- M. next
- · Replies 4 ·
Graduate Commutation Relationships and Operator Functions
- chill_factor
- · Replies 1 ·
Graduate Simultaneous measurement article
- Mordred
- · Replies 1 ·
Graduate Hermitian operator <=> observable?
- Arijun
- · Replies 17 ·
Graduate Constructing quantum operators
- HJ Farnsworth
- · Replies 10 ·
Graduate Interference of two independent electron beams?
- tris_d
- · Replies 6 ·
Graduate How to expand the average <(N - <N>)^2>
- mitch_1211
- · Replies 6 ·
Graduate Complex Vector Space Analogy To Quantum Mechanics
- CrazyNeutrino
- · Replies 10 ·
Graduate Does velocity uncertainty along x-axis affect y-axis motion?
- angy
- · Replies 6 ·
Graduate Coherent state of photons in a laser
- zincshow
- · Replies 6 ·
Graduate Some thoughts on the hidden variables interpertation
- HomogenousCow
- · Replies 2 ·
Graduate Can Quantum Theory Apply to Large-Scale Universe Phenomena?
- Adrian07
- · Replies 2 ·
Graduate Calculating Secondary Electron Energy After 2 MeV Photon Scattering
- j2dabizo
- · Replies 3 ·
Graduate The electron - couple questions
- DiracPool
- · Replies 4 ·
Undergrad How many photons make up a light wave?
- Antuanne
- · Replies 1 ·
Graduate Does measurement in the double slit experiment force particles through a specific slit?
- Astro_Will
- · Replies 1 ·
Graduate Why do quantum effects become negligible for large objects like billiard balls?
- popepius
- · Replies 1 ·
Graduate Completeness relation for polarization vectors
- center o bass
- · Replies 2 ·
High School What is the box in particle in a box?
- mishima
- · Replies 3 ·
Graduate Is commutativity transitive for non degenerate eigenvalues?
- bob900
- · Replies 1 ·
Graduate Magnetic moment of the electron and spin
- Thoros
- · Replies 7 ·
Graduate What is Isospin and How Does it Relate to the Strong Force?
- Antuanne
- · Replies 2 ·
Graduate Wave-Particle Duality: Random Photon Emission
- severo
- · Replies 5 ·
Graduate Is objective reality possible under orthodox QM?
- cdog1350
- · Replies 13 ·
Graduate Change in fine structure constant
- lark
- · Replies 18 ·
Graduate How did Schrodinger's model improve Bohr's model?
- mahrap
- · Replies 2 ·
Graduate Stationary States and time-independent states (aren't they the same?)
- MrMultiMedia
- · Replies 4 ·
Graduate Quantum particle in a rigid box with 2 given wavefunctions solving for energies
- CNMD
- · Replies 3 ·
Graduate What does a deBroglie wave look like?
- jimgraber
- · Replies 1 ·
Graduate Amount of energy required to change the spin of a photon
- San K
- · Replies 15 ·