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 Interaction between neutrons and nuclei during scattering
- Mayan Fung
- · Replies 1 ·
High School The average value of S operator
- Viona
- · Replies 3 ·
Graduate Feynman diagram for bound particle output
- JonAce73
- · Replies 1 ·
Undergrad "Black holes can only get bigger" - huh?
- Terrr
- · Replies 61 ·
Undergrad Can downconverting an entangled photon create three-particle entanglement?
- entropy1
- · Replies 2 ·
Undergrad How does blocking the longer path affect the double slit interference pattern?
- deadbeef
- · Replies 3 ·
Undergrad How can there be an Uncertain Momentum at a Specific Energy?
- BHL 20
- · Replies 13 ·
Undergrad A strange definition for Hermitian operator
- struggling_student
- · Replies 3 ·
Undergrad Does a blind man's machine create superposition in colored apples?
- KDPhysics
- · Replies 25 ·
Undergrad General solution of the hydrogen atom Schrödinger equation
- Oliver321
- · Replies 9 ·
Graduate Experiments probing the macroscopic limits of QM
- Auto-Didact
- · Replies 45 ·
High School Virtual Particles Momentum Transfer
- e2m2a
- · Replies 27 ·
High School Do entangled particles always react in an anti-symmetric way?
- Jerome71
- · Replies 6 ·
Graduate Heisenberg lens and probabilities
- Heidi
- · Replies 9 ·
Graduate Is the freedom-of-choice loophole valid in quantum entanglement experiments?
- little1406
- · Replies 2 ·
Undergrad What is the role of the D term in the Spin-1 XY model's Hamiltonian?
- chaksome
- · Replies 1 ·
Undergrad Degenerate eigenvalue λ=1 giving two-parameter family of eigenstates
- struggling_student
- · Replies 2 ·
High School Electron charge and spin creating a magnetic field?
- JuicyFruit123
- · Replies 12 ·
Graduate State in the infinite potential well
- LagrangeEuler
- · Replies 7 ·
Undergrad Complex conjugate and time reversal operator
- dyn
- · Replies 12 ·
Graduate Request for a review of a paper on consciousness creating reality.
- Emmanuel Pil
- · Replies 4 ·
Undergrad Improper density matrix with negative eigenvalues
- Haorong Wu
- · Replies 27 ·
Undergrad Double slit - properties of slit?
- Homestar1
- · Replies 45 ·
Undergrad [video] Simulating a delayed choice quantum eraser in an online drag-d
- Strilanc
- · Replies 0 ·
Graduate How to systematically find the symmetry operator given a Hamiltonian?
- quantumbitting
- · Replies 1 ·
Undergrad Dimensions of P and ##\omega##
- AHSAN MUJTABA
- · Replies 6 ·
Undergrad How to Show 25% of Cavity Radiant Energy Between 0 and Peak Wavelength?
- Alexander de Souza
- · Replies 1 ·
Undergrad Large scale entanglement experiment
- T C
- · Replies 5 ·
Undergrad Why is entanglement spooky if separated particles have correlated spins from creation?
- Orenshved
- · Replies 8 ·
Graduate Bell inequalities demonstration
- microsansfil
- · Replies 1 ·
High School Gravitational force between matter and antimatter
- Delta2
- · Replies 7 ·
Undergrad What is the meaning of superposition of momentum in coherent states?
- physicsradio
- · Replies 1 ·
High School Time travel in the quantum world
- Arceus
- · Replies 10 ·
Undergrad How quickly do electrons jump orbitals?
- Grasshopper
- · Replies 38 ·
High School Do nested observer perspectives create infinite realities?
- porton
- · Replies 1 ·
Undergrad Are electrons universal problem solvers?
- porton
- · Replies 4 ·
High School I am looking for a paper written by Massimo Blasone
- Heidi
- · Replies 4 ·
Graduate Tensor product in Cartesian coordinates
- LagrangeEuler
- · Replies 4 ·
Graduate Ising lattice seen by an inertial observer
- Heidi
- · Replies 10 ·
Undergrad How Dark could Dark Matter get?
- .Scott
- · Replies 21 ·
Graduate How can we show that the annihilation operators satisfy the given equation?
- etotheipi
- · Replies 10 ·
Graduate Wick's rotation on a complex vector space
- Heidi
- · Replies 3 ·
High School Is the Momentum Operator Hermitian? A Proof
- hokhani
- · Replies 7 ·
Graduate Understanding an Approximation in Statistical Physics
- Arman777
- · Replies 6 ·
High School How do you tell when particles are or aren't entangled?
- louthinator
- · Replies 8 ·
Graduate Do we really need the Hilbert space for Quantum Mechanics?
- jonjacson
- · Replies 6 ·
Undergrad Larmor precession of an electron in a magnetic field?
- docnet
- · Replies 1 ·
Graduate Why is Quantum Field Theory Local?
- LarryS
- · Replies 182 ·
Undergrad Why the linear combination of eigenfunctions is not a solution of the TISE
- Physicslad00
- · Replies 24 ·
Undergrad Atom-photon interaction picture transformation problem 3
- KDPhysics
- · Replies 6 ·
Undergrad Feynman diagram for scalar - vector interaction
- gerald V
- · Replies 2 ·
Undergrad Bell's theorem claimed to be refuted - paper published by EPL
- emuc
- · Replies 50 ·
Undergrad Why can eigenvalue outcomes exceed probability amplitudes in quantum measurements?
- nomadreid
- · Replies 4 ·
Undergrad Probability of finding a particle outside its light cone
- RickRazor
- · Replies 10 ·
Undergrad What is meant here by "quantum mechanics–free subsystem"?
- nomadreid
- · Replies 10 ·
Undergrad What part of physics describes what happens just outside of an electron?
- Anon42
- · Replies 8 ·
Graduate How Does the Anomalous Doppler Effect Work?
- Flamel
- · Replies 1 ·
Graduate Justification for phi^4 potential
- joneall
- · Replies 13 ·
High School Quantify Quantum Eraser Experiment
- glider77
- · Replies 19 ·
High School Some questions about Wheeler's delayed choice experiment
- liuxinhua
- · Replies 18 ·
Undergrad No-cloning theorem vs state tomography identical copies
- Irishdoug
- · Replies 4 ·
High School Does a human observer or a measuring device collapse the wave function?
- Dr3vil
- · Replies 7 ·
Graduate $S^+$ and $S^{-}$ operators formula
- LagrangeEuler
- · Replies 1 ·
Graduate What is the meaning of "excess" Goldstone bosons?
- jack476
- · Replies 3 ·
Graduate Heisenberg equation of motion -- Partial derivative question
- LagrangeEuler
- · Replies 15 ·
Undergrad Can an electron in a magnetic field radiate a virtual photon?
- docnet
- · Replies 3 ·
Graduate Calculating nonequilibrium Green's Functions
- danielw96
- · Replies 1 ·
Undergrad A video about the delayed choice eraser that I made
- Strilanc
- · Replies 4 ·
Undergrad Distribution of charges as a result of the Hall Effect
- Blah God
- · Replies 1 ·
Undergrad Some questions in "Introduction to quantum mechanics"
- heslaheim
- · Replies 1 ·
Undergrad Black body radiation -- Some basic questions to aid my understanding
- AhmedHesham
- · Replies 7 ·
Undergrad Should I always be careful about dimensional consistency?
- Haorong Wu
- · Replies 5 ·
High School Description of isolated macroscopic systems in quantum mechanics
- mephistomunchen
- · Replies 48 ·
Undergrad Are Expectation Values Measured for Coupled Photons from SPDC?
- emuc
- · Replies 2 ·
Undergrad Good resources for learning a little about the wave vector
- phantomvommand
- · Replies 3 ·
Graduate Introduction to topological field theory?
- Kris-L
- · Replies 1 ·
Graduate Second Quantization in QFT
- sophiatev
- · Replies 4 ·
High School What percent of everyday-life electrons are collapsed?
- VECT
- · Replies 46 ·
Undergrad Applying Heisenberg picture to density operator
- Haorong Wu
- · Replies 2 ·
Undergrad Mixed states from entangled state
- ilikesquareobjects
- · Replies 6 ·
Undergrad Quantum entanglement. -- Spin up, spin down, isn't it the same?
- RockSteadyUK
- · Replies 10 ·
High School Electron angular momentum, gyroscope?
- Homestar1
- · Replies 14 ·
Undergrad Measuring 4-partite entanglement in GHZ states when partial transpose negativity is zero
- Jufa
- · Replies 1 ·
Undergrad Do even-spin exchange particles give attractive forces between equal charges?
- simplemind
- · Replies 15 ·
High School Is a black hole a massive ball of photons?
- Kyran
- · Replies 7 ·
Undergrad How Does Negative Pressure Influence the Expansion of the Universe?
- RJ Emery
- · Replies 10 ·
High School View double slit from other end
- Samina
- · Replies 1 ·
High School "Test of wave function collapse suggests gravity is not the answer"
- StevieTNZ
- · Replies 3 ·
High School Does the Higgs Boson really have 0 spin?
- jwb44
- · Replies 4 ·
High School Are electronic transitions a result of a single photon?
- Maurice Morelock
- · Replies 6 ·
Undergrad Why Does Spin Down Have Lower Energy Than Spin Up in a Magnetic Field?
- docnet
- · Replies 2 ·
Undergrad Are Different Charged Gluons Repulsive in the Gluon-Gluon Four-Point Vertex?
- simplemind
- · Replies 5 ·
Undergrad Problem with Commutator of Gauge Covariant Derivatives?
- tomdodd4598
- · Replies 8 ·
Undergrad Does wave function collapse change the Coulomb potential?
- Mayan Fung
- · Replies 10 ·
Graduate Does photon energy apply to excitation timescales shorter than one second?
- Maurice Morelock
- · Replies 1 ·
Undergrad Optical spectrum analyzer related
- chisuma
- · Replies 3 ·
Graduate Why is 4-Momentum Conserved in Quantum Field Theory?
- Jamister
- · Replies 1 ·
Undergrad Is London depth in superconductors analogous to skin depth?
- iVenky
- · Replies 2 ·
High School Does measurement affect entangled particles separated by light-minutes?
- KingGambit
- · Replies 5 ·
Undergrad How Does Spin-Orbit Coupling Affect Quantum Number Validity?
- kelly0303
- · Replies 14 ·