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 Why aren't all particles entangled if they originated in the big bang?
- Eridu
- · Replies 4 ·
High School Local Hidden Variable Model That Equals QM Predictions?
- Point Conception
- · Replies 21 ·
Undergrad What is the Significance of Isospin Components in Particle Physics?
- smartypants123
- · Replies 3 ·
Undergrad Regarding consciousness causing wavefunction collapse
- Trollfaz
- · Replies 81 ·
High School Does precise momentum guarantee precise energy?
- LarryS
- · Replies 10 ·
High School Are Molecules Entangled Across Distances in Biochemistry?
- Rainbows_
- · Replies 2 ·
Undergrad Does the wave function shorten when approaching light speed?
- KBon
- · Replies 2 ·
High School Understanding Atomic Systems: Nucleus and Electrons in a Constant State
- Rainbows_
- · Replies 21 ·
Undergrad Zeeman effect after a Stern-Gerlach experiment
- svletana
- · Replies 3 ·
Graduate Why do we use BRST in Yang Mills and where does it come from?
- formodular
- · Replies 3 ·
High School How do electrons behave when energy is added to an atom's ground state?
- Arup Biswas
- · Replies 2 ·
High School Examples of multiple entanglements
- mieral
- · Replies 4 ·
Undergrad Does spatial entanglement reduce total classical entropy?
- LarryS
- · Replies 10 ·
Graduate Photon propagator in Coulomb gauge
- lalo_u
- · Replies 7 ·
Undergrad Spherical Harmonics from operator analysis
- davidge
- · Replies 13 ·
Undergrad Absorption rate on a quantised EM field
- brunow
- · Replies 1 ·
Undergrad Deriving the path integral from the propagator and Lagrangian
- redtree
- · Replies 6 ·
Undergrad Is Entropic Uncertainty Principle taken seriously in QM?
- LarryS
- · Replies 1 ·
Undergrad Revisiting Heisenberg's Uncertainty Principle: Is There Room for Improvement?
- chitranshgtm
- · Replies 5 ·
Graduate Why count principal G bundles in topological field theory
- nateHI
- · Replies 10 ·
Undergrad Why not calculate the "trajectory" of a wave function
- zhouhao
- · Replies 6 ·
Undergrad Using timelike Killing vectors to construct positive and negative frequency modes
- Frank Castle
- · Replies 27 ·
Undergrad 'Normalisation' of Fourier Transforms in QFT
- tomdodd4598
- · Replies 1 ·
Undergrad SO(2n) representation on n complex fields
- hideelo
- · Replies 4 ·
Undergrad How is the CSCO in an harmonic oscillator?
- Dario SLC
- · Replies 6 ·
Undergrad Why isn't the photon energy h nu over two?
- DaveLush
- · Replies 3 ·
Undergrad Defining vector operators coordinate-independently in Hilbert space
- David Olivier
- · Replies 37 ·
Undergrad Can light be entangled in polarization and still exhibit interference?
- Erik Ayer
- · Replies 12 ·
High School Photon producing Electron-Positron pair's effect on c.
- abilolado
- · Replies 2 ·
Graduate Constant Solutions of Real Scalar Field
- hilbert2
- · Replies 5 ·
High School Does zero wavelength correspond to infinite energy?
- Sam_A
- · Replies 3 ·
Undergrad How does measurement work in a two particle universe?
- FallenApple
- · Replies 3 ·
Undergrad Decoherence Pure States Into Mixed States
- Electric to be
- · Replies 2 ·
Graduate Calculating Einstein's coefficients in QFT vs equilibrium
- alemsalem
- · Replies 11 ·
Undergrad If electromagnetic waves propagate, do photons as well?
- calinvass
- · Replies 7 ·
Undergrad How do we interpret an EM wave using Quantum Mechanics?
- calinvass
- · Replies 7 ·
Undergrad Questions about the Dirac delta
- Isaac0427
- · Replies 26 ·
Undergrad Two-Level Atom Driven by Two Lasers?
- Twigg
- · Replies 0 ·
High School Is Light a Wave or a Particle? Understanding Its Nature and Travel to Our Eyes
- Quantum Velocity
- · Replies 4 ·
High School Heisenberg applied to accelerated particles
- Chorlton
- · Replies 4 ·
Undergrad How to derive the associated Legendre equation
- davidge
- · Replies 10 ·
Undergrad Actual example of a mixed state not part of entangled state
- Rainbows_
- · Replies 26 ·
High School Terry Tao's Interesting View of QM
- bhobba
- · Replies 1 ·
Undergrad Quantum entangled image sensor for space camera-telescope
- Thelonious Monk
- · Replies 5 ·
Undergrad Experimental history of quantum physics
- manu de hanoi
- · Replies 7 ·
Undergrad How does sequential measurement affect observable data in molecules?
- Rainbows_
- · Replies 7 ·
Undergrad Similar behavior between anti-particles and waves?
- despues357
- · Replies 2 ·
Graduate Discrete measurement operator definition
- jim jones
- · Replies 2 ·
High School What is the physical significance of operators in quantum mechanics?
- Wrichik Basu
- · Replies 25 ·
Graduate What Hilbert space for a spinless particle?
- David Olivier
- · Replies 44 ·
High School How much space does a single photon occupy?
- Peter Mason
- · Replies 47 ·
High School Measuring momentum and position in particle colliders
- Sophrosyne
- · Replies 12 ·
Undergrad Establishing consistency between a wave model of the photon and a particle model
- Charles Link
- · Replies 6 ·
Undergrad (QED) The initial mass and the correction cancelling out
- Christian
- · Replies 20 ·
Undergrad Hamiltonian in Quantum vs Classical
- Electric to be
- · Replies 40 ·
High School Why don't emission/loss of virtual photons lower a charge's energy?
- Ahsan Khan
- · Replies 2 ·
Undergrad Why infinite energy from tunneling-assisted fusion violates thermodynamics
- Ethan Singer
- · Replies 7 ·
Undergrad Lorentz transformation and its Noether current
- Ken Gallock
- · Replies 6 ·
High School What is Quantum Spin? Understanding Basics
- Quantum Velocity
- · Replies 10 ·
Undergrad Radiative collapse of an electron in a classical atom
- LauritsT
- · Replies 6 ·
Undergrad Fermi's golden rule derivation
- -marko-
- · Replies 1 ·
Undergrad Do quantum fluctuations mean metric fluctuations?
- nomadreid
- · Replies 1 ·
High School Delayed Choice Quantum Eraser - Experimental Details
- albroun
- · Replies 2 ·
High School Can an atom be in two places at once?
- Habib_7654
- · Replies 5 ·
Undergrad Determinant problem in an article about QCD phase diagram
- Ken Gallock
- · Replies 4 ·
High School About electrons and the photoelectric effect
- rareEarthminerals
- · Replies 2 ·
High School Is there any state of matter colder than solid?
- Quantum Velocity
- · Replies 10 ·
Undergrad Does quantum teleportation violate conservation of energy?
- Trollfaz
- · Replies 5 ·
Undergrad Deductions of Formulas for Energy
- cazador970
- · Replies 2 ·
Insights Struggles with the Continuum - Part 7 - Comments
- john baez
- · Replies 2 ·
Undergrad Energy-time versus time bin DOF
- Armchair
- · Replies 8 ·
Undergrad What does the 0-ket in this state function expression represent?
- davidge
- · Replies 3 ·
High School Does Momentum Affect Potential Energy in a Particle Box?
- mieral
- · Replies 41 ·
Undergrad Where can I find textbooks and articles on relativistic Landau levels?
- Ken Gallock
- · Replies 1 ·
Undergrad Path Integral in QM: Resolving Confusion on Causality
- Silviu
- · Replies 1 ·
Undergrad Are QFT fields the medium for light?
- FallenApple
- · Replies 21 ·
Undergrad Does Bra-Ket Notation Clarify the Gradient Operator in Quantum Mechanics?
- christianmetzgeer
- · Replies 11 ·
Undergrad Do Hydrogen and Helium Electrons Share Identical Energy Quantums?
- barryj
- · Replies 16 ·
Undergrad Potential energy in quantum chemistry beyond fundamental forces
- mieral
- · Replies 14 ·
Undergrad Usage of partition function in derivation of Sackur-Tetrode
- georg gill
- · Replies 6 ·
Undergrad Retrocausality in quantum field theory and experimental tests
- Buzz Bloom
- · Replies 21 ·
Graduate Similarity in form of time-evolution and Gibbs weight?
- muscaria
- · Replies 1 ·
Undergrad Solving for <E^2> of a non-stationary state of the QSHO
- hnicholls
- · Replies 1 ·
Undergrad Does a field operator always commute with itself?
- Frank Castle
- · Replies 2 ·
High School The Dirac equation and the spectrum of the hydrogen atom
- Sophrosyne
- · Replies 10 ·
Undergrad Bell's Inequality is only valid for non-negative numbers
- harpo
- · Replies 2 ·
High School Can quantum entanglement transmit information faster than light?
- Dr Wu
- · Replies 2 ·
Undergrad Just what is information, and what is its place in Nature
- plschwartzx
- · Replies 17 ·
High School Double-slit experiment observed by split brain
- Bojan Keevill
- · Replies 9 ·
Graduate Dyson's Formula from Tong's lecture notes
- noir1993
- · Replies 19 ·
High School How does quantum entanglement protect a key?
- gnnmartin
- · Replies 4 ·
Undergrad Why does de Broglie wavelength decrease with momentum if matter isn't a wave?
- Blue Scallop
- · Replies 41 ·
Undergrad What does it mean to span the Bloch sphere?
- PieroC
- · Replies 4 ·
Undergrad Unruh effect in full spacetime
- gerald V
- · Replies 5 ·
Undergrad Relationship between negative mass, energy and antimatter
- martin25p2
- · Replies 10 ·
Undergrad Fourier transform and locality/uncertainty
- bznm
- · Replies 6 ·
Graduate Field strength measurement and continuity
- hilbert2
- · Replies 8 ·
Undergrad Proving the Pauli matrix identity for Poincaré group representations
- formodular
- · Replies 9 ·
Undergrad Why does "wave particle duality" not exist anymore?
- Dadface
- · Replies 39 ·
Undergrad How do electrons impact the probability of fusion in a non-plasma fluid system?
- Aidan Davis
- · Replies 1 ·