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
High School Dirac Equation vs. Schrodinger Equation
- DiracPool
- · Replies 16 ·
High School Pure vs mixed states in two-molecule excitonic interaction
- HAYAO
- · Replies 18 ·
Graduate Is entanglement based on first principles?
- nortonian
- · Replies 34 ·
Undergrad Notation question about equation 21 in Dirac's Principles of Quantum Mechanics
- Frost_Xue
- · Replies 2 ·
High School Why is quantum physics called mechanics?
- Quotidian
- · Replies 4 ·
High School Is the Higgs Field Uniform Across Space-Time or Does It Vary?
- hsdrop
- · Replies 9 ·
Undergrad How are different potentials implemented experimentally?
- pcflores
- · Replies 2 ·
Graduate Srednicki's QFT: Feynman Rules and Feynman Diagrams
- Junaid456
- · Replies 4 ·
Undergrad Double Slit Experiment: Magnification?
- Simon Peach
- · Replies 2 ·
Graduate Is this experiment real (double slit)?
- alikim
- · Replies 3 ·
High School The Firewall Paradox: Is it Possible?
- steveJOBS
- · Replies 1 ·
Undergrad How can larger dips in absorption line give more element
- Phys12
- · Replies 1 ·
High School Quantum Entanglement. Is spin conserved?
- Clever Penguin
- · Replies 2 ·
Undergrad Why is association rule in angular momentum sum not valid?
- goodphy
- · Replies 3 ·
Undergrad How do you interpret operators and states in the Heisenberg picture?
- quickAndLucky
- · Replies 3 ·
Graduate Why the particle velocity in Dirac theory is equal to c?
- Arbab
- · Replies 5 ·
High School Meaning of the word 'instantaneous'
- Deepak K Kapur
- · Replies 113 ·
Undergrad Why negative alpha excluded when solving Schrödinger equation in Feynman Lectures
- forcefield
- · Replies 15 ·
Undergrad High Energy Photon Recieved as Lesser Energy Photons?
- Chris Frisella
- · Replies 3 ·
Graduate Wavefunction matching two different H, not just V
- SturgySturges
- · Replies 3 ·
Undergrad Delayed choice, pseudo-retrocausality, massive particles
- Quantum of Solace
- · Replies 23 ·
Undergrad Particle number conservation and motivations for QFT
- Frank Castle
- · Replies 22 ·
Undergrad Zeeman effect sign of circular polarization
- Khashishi
- · Replies 3 ·
Graduate What is the physical significance of the unitary matrix in this optical device?
- naima
- · Replies 12 ·
Undergrad Why are total orbital QN l,m zero for closed subshell?
- goodphy
- · Replies 10 ·
High School Is the wave function physical ?
- DoobleD
- · Replies 26 ·
High School Accuracy in speed of photon - uncertainty?
- chester20080
- · Replies 14 ·
Undergrad Evalutaion of Schrodinger's equation
- student354
- · Replies 1 ·
Undergrad Comments on updated delayed choice erasure graphic
- Strilanc
- · Replies 1 ·
High School Why is momentum the fourier transform of the wavefunction ?
- DoobleD
- · Replies 6 ·
Undergrad Sign of amplitude in sinusoidal wave boundary conditions
- Soren4
- · Replies 4 ·
High School What is the origin of Observables?
- entropy1
- · Replies 31 ·
High School An application of the uncertainty principle
- Youyang Zhao
- · Replies 2 ·
Undergrad How can you visualize the Higgs field, or can you?
- scientepid
- · Replies 4 ·
Undergrad Spontaneous Absorption of Photons in Two State Quantum System
- Smalde
- · Replies 6 ·
Undergrad Finding probability of changing states
- TheCanadian
- · Replies 1 ·
Graduate How to understand the electric-field operator?
- Jeffrey Yang
- · Replies 6 ·
High School Polytropic process with heat addition
- Rakesh bhatoa
- · Replies 2 ·
Undergrad Could you provide me a selection rule?
- goodphy
- · Replies 3 ·
Undergrad What is a time-dependent operator?
- weezy
- · Replies 18 ·
High School Understanding Different Quantum Interactions
- jackferry
- · Replies 1 ·
Undergrad Why does momentum operator act on both bra and ket in <x|p|ψ>?
- dyn
- · Replies 7 ·
Undergrad What is a coherent pulse of specified area?
- TheCanadian
- · Replies 4 ·
Graduate Fock space and Poincaré invariance
- Gedankenspiel
- · Replies 24 ·
Undergrad Mind Bending Double-Slit Diffraction Thought Experiment
- theoligarch dot com
- · Replies 13 ·
High School Is Gravitational Quantization Supported by the Stability of Orbital Electrons?
- Cato
- · Replies 17 ·
Undergrad Is spacetime a field or are fields excitations of spacetime?
- Quest_Ion
- · Replies 3 ·
High School Neutrinos and Fermi-Dirac Distribution
- TDanskin
- · Replies 2 ·
Undergrad What is the reason behind uncertainty principle?
- weezy
- · Replies 3 ·
High School What is the reason for Schrodinger's cat experiment?
- steveJOBS
- · Replies 9 ·
Graduate Interpreting the K-G Annihilation Operator Expression
- bolbteppa
- · Replies 5 ·
Undergrad Can a Discontinuous Wave Function Be Acceptable in Quantum Mechanics?
- Moses Lee
- · Replies 6 ·
Undergrad Understanding ΔEΔt uncertainty
- hideelo
- · Replies 12 ·
Undergrad Understanding Internal State in Quantum Systems with Cold Atoms
- KFC
- · Replies 7 ·
High School Understanding Correlations in Non-Realism: The Role of Extra Variables?
- gva
- · Replies 9 ·
High School Wave Function of a Proton in a Box with a Slide
- Einstein's Cat
- · Replies 7 ·
Graduate QFT and transitions between momentum states
- hilbert2
- · Replies 1 ·
High School Counterarguments to Wigner's Friend as a refutation of wave function collapse
- gva
- · Replies 20 ·
Graduate Uncertainties in Poisson processes
- marco1235
- · Replies 4 ·
Undergrad The Lagrangian of a Coherent State
- Blabbityblobo667
- · Replies 2 ·
High School Should Fourier Transforms Be Taught Before the Heisenberg Uncertainty Principle?
- houlahound
- · Replies 6 ·
High School How does Bell's inequality rule out realism?
- PhysicsEntanglment
- · Replies 79 ·
Undergrad Field eigenstates and path integral formulation
- Alhaurin
- · Replies 4 ·
Graduate Significance of "at an event" in conjugate variable definitions
- anorlunda
- · Replies 7 ·
Undergrad Time evolution after "turning off" square well
- Swamp Thing
- · Replies 5 ·
Undergrad What is the angle in the action-angle uncertainty principle?
- nomadreid
- · Replies 6 ·
High School Other terms for indeterministic hidden variables
- gva
- · Replies 10 ·
Undergrad Two photon absorption or multi-photon absorption?
- fog37
- · Replies 6 ·
High School Why is probability defined in space rather than at a point in quantum mechanics?
- Naman Jain Kota
- · Replies 3 ·
High School Is an Electron Both a Wave and a Particle Simultaneously?
- Deepak K Kapur
- · Replies 13 ·
Undergrad Quantum Superposition While Observing Phenomena?
- DQuantum14
- · Replies 4 ·
High School Energy density of charged capacitor via QFT
- Spinnor
- · Replies 1 ·
Undergrad Strong Force and Wave function collapse
- Bill Myk
- · Replies 1 ·
Undergrad What is the Eigenvalue of Coherent States?
- dyn
- · Replies 17 ·
High School What is oscillating in the de Broglie wave of a moving electron?
- Dexter Neutron
- · Replies 5 ·
Undergrad Is There a Reliable Source Code for Quantum Key Distribution?
- okigbo anthony
- · Replies 5 ·
Graduate Double Slit--closing a slit while particle is in flight
- tpeabody
- · Replies 6 ·
High School Classical experiment violates Bell
- DirkMan
- · Replies 3 ·
High School Schrodinger cat superperposition vs sharp state
- GC2893
- · Replies 3 ·
Graduate Green's function at boundaries
- mupsi
- · Replies 1 ·
Undergrad Delayed choice quantum eraser scanning telescope
- 0xDEAD BEEF
- · Replies 13 ·
Undergrad Big Freeze: Resolving the Universe's End?
- Galactic explosion
- · Replies 4 ·
Undergrad Planck-Einstein: how does it separate classical from Quantum?
- Zero-shift
- · Replies 3 ·
Undergrad Infinite square well solution - periodic boundary conditions
- McLaren Rulez
- · Replies 15 ·
Undergrad A thought about parallel universe
- rizkiyoist
- · Replies 9 ·
Undergrad What is the relation between Temperature and Quantum State?
- jonjacson
- · Replies 4 ·
High School Does weak measurement cause mixed state?
- entropy1
- · Replies 1 ·
Undergrad Radioactive decay, falling pencils and the uncertainty principle
- Happiness
- · Replies 2 ·
Graduate Quantum Computing: Difference vs Normal Computers
- MasterSashin04
- · Replies 3 ·
Undergrad What happens to Quantum decoherence at Absolute Zero?
- Oganesson
- · Replies 3 ·
Undergrad Regarding the eigenvalues of the translation operator
- otaKu
- · Replies 3 ·
Undergrad Calculation of vibronic couplings
- slawa
- · Replies 1 ·
Undergrad Relationship of Light's Wavelengthvs and Probability Wave?
- Chris Frisella
- · Replies 2 ·
Undergrad Impossible to exclude hidden variables without entanglement?
- greypilgrim
- · Replies 5 ·
Undergrad Is the uncertainty principle an ontological statement?
- Happiness
- · Replies 10 ·
High School Can deterministic processes underlie quantum probability distributions?
- raphalbatros
- · Replies 86 ·
Undergrad Uncertainty Principle: Theorem or Principle?
- facenian
- · Replies 3 ·
High School Pseudorandomness of correlation
- entropy1
- · Replies 5 ·
Undergrad Justification for introducting "Disentaglers" in MERA
- Jimster41
- · Replies 2 ·
Undergrad What corresponds to the wave function in quantum field theory?
- MichPod
- · Replies 31 ·