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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Undergrad How does observation affect reality
- Trollfaz
- · Replies 64 ·
High School What is Decoherence and How Did Bohr and Einstein Debate Its Implications?
- Navid Eghbali9
- · Replies 2 ·
High School Wave Function Collapsing Function
- sqljunkey
- · Replies 5 ·
High School Do wave packets really represent a free particle?
- LarryS
- · Replies 16 ·
High School Is 'Synchronized' a Misleading Term for Entangled Atoms?
- Chris Miller
- · Replies 4 ·
Undergrad Quantum Entanglement on the Moon
- John Hurly
- · Replies 1 ·
Undergrad Propagator operator in Heinsenberg picture
- Silviu
- · Replies 5 ·
Graduate TQFT From Purely Mathematical Considerations
- nateHI
- · Replies 1 ·
High School Are vertical lines from squinting a Quantum phenomenon?
- wildsheep
- · Replies 1 ·
High School Brownian motion from virtual photons?
- SlowThinker
- · Replies 11 ·
High School Do particles "care" about consciousness or simply the data
- Jacob Gable
- · Replies 1 ·
Undergrad How to understand the derivation for this process in QFT?
- leo.
- · Replies 1 ·
Undergrad What is Cn in quantum mechanics?
- Tooba Sohail
- · Replies 8 ·
Undergrad Causality preserved in Klein-Gordon equation
- Silviu
- · Replies 3 ·
Undergrad Why is entanglement crucial for quantum computing?
- skanskan
- · Replies 10 ·
Undergrad Proof of some identities regarding spin angular momentum.
- Faisal Moshiur
- · Replies 2 ·
High School Energy in microwave cavity quantized?
- Spinnor
- · Replies 17 ·
Graduate On the equivalence of operator vs path integral in QFT
- ftr
- · Replies 15 ·
High School Does the Compton effect only occur at a specific angle of incidence?
- physics user1
- · Replies 2 ·
Undergrad Wu Experiment and Parity Violation
- MaxFieg
- · Replies 3 ·
High School What is the shortest wavelength of all? >0 or h?
- Daniel Petka
- · Replies 4 ·
Undergrad Proving that an operator squared equals its matrix squared
- dyn
- · Replies 5 ·
High School Entangled particles and lorentz contraction?
- letumio
- · Replies 10 ·
Graduate Why is deBroglie λ for electrons the same as λ for photons?
- Tommy R
- · Replies 3 ·
Undergrad Quantum Tunneling: Can it Cause Stable Systems To Transition?
- Trollfaz
- · Replies 1 ·
Undergrad Are continous Spectra actually discrete?
- Rohan Patil
- · Replies 5 ·
High School Understanding Forces and Fields in Classical and Quantum Interactions
- Blue Scallop
- · Replies 14 ·
Graduate Symmetrisation of wave function for fermions
- djelovin
- · Replies 2 ·
Undergrad Larmor frequency units don't work out with eB/mc
- BrokenPhysics
- · Replies 5 ·
High School Is Classical EM Field the Same as Photon Wave Function?
- Blue Scallop
- · Replies 62 ·
Graduate Non-locality and The First Law of Thermodynamics
- Dennis Plews
- · Replies 3 ·
Undergrad Momentum and energy in QM and QFT
- asimov42
- · Replies 9 ·
High School Can all quantum fields be unified into one field?
- ChrisisC
- · Replies 33 ·
High School Non-Hermitian operator for superposition
- Blue Scallop
- · Replies 7 ·
Undergrad Can an electron with defined momentum hit a specific point on a wall?
- mike1000
- · Replies 39 ·
High School Mistaking QM/Measurement problems....
- Blue Scallop
- · Replies 1 ·
Undergrad Common interaction vacuum for QED + QCD?
- Neutrinos02
- · Replies 4 ·
Graduate Can classical EM be derived from QFT?
- maka89
- · Replies 3 ·
Undergrad How does phase symmetry in QM imply charge conservation?
- davidge
- · Replies 14 ·
Undergrad Does completeness relation hold for normalized state vector sets?
- redtree
- · Replies 9 ·
Undergrad What Is the Physics Behind Particle Traveling Over Voltage?
- TBert
- · Replies 9 ·
High School Canonically conjugate quantities
- PrathameshR
- · Replies 19 ·
Undergrad Radiation passing through Planck-scale wormholes
- Troodon Roar
- · Replies 2 ·
Graduate What Experimental Techniques Can Enhance Quantum State Preparation?
- JordanD
- · Replies 2 ·
Undergrad Deriving resolution of the identity without Dirac notation
- redtree
- · Replies 9 ·
Graduate Dependence of entropy and temperature on Planck's constant
- spaghetti3451
- · Replies 1 ·
Undergrad Quirk: quantum circuit simulator with drag-and-drop
- Strilanc
- · Replies 13 ·
High School Is Quantum Mechanics Necessary for Understanding Water's Properties?
- Andrew Wright
- · Replies 4 ·
Undergrad Do atomic orbitals shift when an electron is excited?
- pierce15
- · Replies 5 ·
Undergrad Phase of |0> when it appears in a product
- Swamp Thing
- · Replies 3 ·
High School Is There a Quantum Lift Analogous to Aerodynamic Lift?
- Blue Scallop
- · Replies 3 ·
Undergrad Would we observe a changing Planck's constant?
- sgphysics
- · Replies 8 ·
Undergrad Delayed choice quantum eraser - partial information retrieval
- rnk
- · Replies 2 ·
High School Is QE knowing how to correlate particles' measurements?
- Chris Miller
- · Replies 6 ·
Undergrad Introducing QM via commutators
- MichPod
- · Replies 7 ·
Undergrad What are the probabilities for different outcomes with Bose-Einstein statistics?
- Swamp Thing
- · Replies 4 ·
Undergrad Data from a delayed choice quantum eraser experiment
- boxfullofvacuumtubes
- · Replies 1 ·
Graduate Resources for GRW, CSL collapse models
- anubodh
- · Replies 2 ·
Undergrad Why is momentum the Fourier transform of position?
- entropy1
- · Replies 12 ·
High School Some website about new Bohr model
- HAYAO
- · Replies 3 ·
Undergrad Distinguishable Terms in a State
- Swamp Thing
- · Replies 1 ·
Graduate Can qubits store more than two quantum states?
- askalot
- · Replies 7 ·
High School Double slit experiment - doesn't measurement affect photons?
- Saiker
- · Replies 9 ·
Graduate Gauge-invariant operators in correlation functions
- spaghetti3451
- · Replies 1 ·
Undergrad They physics of phase inversion in Grover's algorithm
- dreamspy
- · Replies 2 ·
Undergrad Can the energy of a particle ensemble in QFT be bounded over time?
- asimov42
- · Replies 37 ·
Undergrad How to Shut Up and Calculate a Delayed Choice Outcome
- Swamp Thing
- · Replies 2 ·
Graduate Gauge transformations at infinity
- spaghetti3451
- · Replies 1 ·
Undergrad What's wrong with Quantum Mechanics and its teaching?
- MichPod
- · Replies 16 ·
Undergrad Scattering, 4 point correlator, number of distinct Feynman diagrams
- binbagsss
- · Replies 15 ·
High School Photons -- do you know what they are?
- rahaverhma
- · Replies 2 ·
High School Quantum entanglement and relativistic simultaneity
- Chris Miller
- · Replies 12 ·
Undergrad Trying to model wave function collapse
- mike1000
- · Replies 6 ·
Graduate What’s the physical nature of the pilot wave?
- Maxwell's Demon
- · Replies 4 ·
Graduate Quantized Dirac field calculations
- Nod
- · Replies 5 ·
Undergrad Some said 1000's of experiments support superposition but
- mike1000
- · Replies 31 ·
Undergrad Do slits absorb photons at the edges?
- Swamp Thing
- · Replies 1 ·
Undergrad Where Can I Find Loudon's Paper on Two-Particle Interference Online?
- Swamp Thing
- · Replies 4 ·
Graduate Total derivative of momentum in quantum mechanics
- kd6ac
- · Replies 5 ·
Undergrad Why no interference in modified delayed choice quantum eraser without which-way info
- LikenTs
- · Replies 6 ·
High School Time dilation and quantum entanglement.
- ArmChairPhysicist
- · Replies 3 ·
High School Is this a good understanding of superposition?
- Addez123
- · Replies 7 ·
Undergrad Modeling EPR - Local or Non-Local
- edguy99
- · Replies 23 ·
High School Why did Max Planck quantize light?
- Zahidur
- · Replies 10 ·
Undergrad What inspired Dirac's formulation of quantum theory?
- victor94
- · Replies 3 ·
Undergrad Virial theorem as applied to hydrogen atom
- Dadface
- · Replies 2 ·
Undergrad Derivative = 0 is always minima? (Linear variational method)
- HAYAO
- · Replies 8 ·
High School Electrons interfere with eachother?
- dooces
- · Replies 1 ·
Undergrad The problem with measuring short distances
- Higgsono
- · Replies 4 ·
Graduate What happens mathematically when a wave function collapses
- Christoffelsymbol100
- · Replies 20 ·
Undergrad Still unclear on superposition
- mike1000
- · Replies 9 ·
Undergrad Why can't all bits of an entanglement be read at once?
- Kenneth Adam Miller
- · Replies 1 ·
High School Probability distribution of eigenvalues on a 120-sided die
- mike1000
- · Replies 9 ·
Graduate Normalizable States in QM: Bound vs. Scattering
- asdf60
- · Replies 4 ·
Undergrad Constraints on potential for normalizable wavefunction
- Gfunction
- · Replies 1 ·
Undergrad How do we measure the EM field that a particle produces?
- joegibs
- · Replies 21 ·
Undergrad Could Hidden Variables Explain Quantum Mechanics without Locality?
- Flatland
- · Replies 10 ·
Undergrad Trying to understand the interference limits of matter-wave
- tiagovtristao
- · Replies 9 ·
Undergrad Bell test where observers never were in a common light cone
- greypilgrim
- · Replies 4 ·
Undergrad Can Quantum Fields be derived from Particles?
- friend
- · Replies 12 ·