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 Linear equations and superposition of wavefunctions
- dyn
- · Replies 4 ·
Undergrad Looking for straight explanation of entanglement
- KFC
- · Replies 10 ·
Undergrad Do particles reach equal momentum magnitudes during thermalisation?
- Frank Castle
- · Replies 12 ·
Undergrad How Does Heisenberg's Matrix Mechanics Relate to Dirac's Notation?
- Sophrosyne
- · Replies 2 ·
Graduate Calculating the unit of gamma from equation 2.3
- amelos
- · Replies 6 ·
Undergrad What is the relationship between entanglement and entropy in quantum systems?
- valanna
- · Replies 8 ·
High School What exactly is quantum physics?
- Flare12
- · Replies 4 ·
High School Why exp(ikx-iwt) and not exp(ikx+iwt)?
- Isaac0427
- · Replies 5 ·
High School What experiments prove the existence of fermion fields?
- bluecap
- · Replies 8 ·
High School Do massive particles gain mass when entangled and one is accelerated?
- RRoader
- · Replies 2 ·
High School Understanding Chemical Bonds: How Does Quantum Mechanics Explain Them?
- Intle
- · Replies 1 ·
High School How Do Quantum Dots and NV Centers Measure Single Electron Spin Changes?
- bluecap
- · Replies 2 ·
High School Why Can't We Choose an Electron's Spin?
- BenAS
- · Replies 9 ·
Undergrad What test for determing particle spin?
- Chris Frisella
- · Replies 13 ·
High School Regarding Young's two slit experiment
- mshawkeyems
- · Replies 3 ·
High School New retrocausality experiment ?
- Nicky665
- · Replies 1 ·
Undergrad Deriving Bose enhancement and Pauli blocking transition rates
- "Don't panic!"
- · Replies 3 ·
Undergrad T-symmetry and conservation of energy
- entropy1
- · Replies 2 ·
High School Energy released in electron transition
- Nitheesh
- · Replies 6 ·
Undergrad Does commuting J and L with the angular momentum commutation relation give zero?
- Frank Einstein
- · Replies 2 ·
Undergrad Sinusoidal Potential in Schroedinger
- Sturk200
- · Replies 1 ·
High School Why doesn't light destroy matter
- TCar
- · Replies 5 ·
Undergrad Classical/QM justification of principle of least action
- greypilgrim
- · Replies 6 ·
Undergrad How do I find this state |j,m=j> to calculate another state?
- valanna
- · Replies 2 ·
Graduate What is the Interpretation of Running Coupling in MS Scheme?
- Luca_Mantani
- · Replies 5 ·
Graduate Identical Fermions in identical linear combinations
- hokhani
- · Replies 3 ·
High School Conservation of energy in quantum physics
- IAmJustCurious
- · Replies 5 ·
Graduate What is a Mass Independent Renormalization Scheme?
- Luca_Mantani
- · Replies 6 ·
Undergrad Confusion about initial states and coherent states
- valanna
- · Replies 5 ·
High School Examples of quantum randomness?
- houlahound
- · Replies 14 ·
Graduate Can Protons Interact with Double Slit Construction?
- julmfyysik
- · Replies 6 ·
Graduate What does 'mode' mean in free scalar field expansion?
- "Don't panic!"
- · Replies 2 ·
High School Are Pointer States Primitives in Quantum Mechanics?
- bluecap
- · Replies 3 ·
High School How can quanta be both energy packets and continuous distributions?
- shaylempert
- · Replies 28 ·
High School Do electrons in atomic orbits ever collide with each other?
- shina
- · Replies 8 ·
Undergrad What Are Kets and Vectors in 3-D Representation?
- dyn
- · Replies 5 ·
Undergrad Radioactive decay, macroscopic objects
- durant35
- · Replies 1 ·
Graduate Canonical quantisation of the EM field
- Mr-R
- · Replies 2 ·
Undergrad Fourier transform of Coulomb potential
- IanBerkman
- · Replies 3 ·
Undergrad Visualizations of a hydrogen atom in an external electric field
- The Bill
- · Replies 11 ·
Undergrad Simple calc. of energy levels in quantum harmonic oscillator
- exponent137
- · Replies 8 ·
Undergrad What happens to super-symmetry at the center of a black hole?
- cheme2019
- · Replies 1 ·
High School Is it possible to create macroscopic Casimir effect?
- Bawelna
- · Replies 6 ·
Undergrad How to change the Hamiltonian in a change of basis
- IanBerkman
- · Replies 16 ·
Undergrad Will quantum computers be able to factor larger numbers in the future?
- Fooality
- · Replies 7 ·
High School Can the Bohmian Wave Function Influence Thermodynamic Trajectories?
- bluecap
- · Replies 3 ·
Undergrad Is the Triplet State Entanglement the same as Singlet State Entanglement?
- looseleaf
- · Replies 7 ·
Undergrad Box normalization for the free particle-Position operator
- Joker93
- · Replies 10 ·
Undergrad Elitzur-Dolev Quantum Liar Paradox
- Quantum of Solace
- · Replies 3 ·
High School Is General Relativity Merely a Classical Framework for Calculations?
- bluecap
- · Replies 41 ·
Graduate Why does expectation values are always nonnegative?
- zhdx
- · Replies 23 ·
Undergrad What turns energy into matter and vice versa?
- physics user1
- · Replies 21 ·
Undergrad Understanding Schrodinger's cat
- kent davidge
- · Replies 3 ·
Undergrad A quantum system under constant observation
- nashed
- · Replies 4 ·
Graduate Particle in a box in momentum basis
- Ravi Mohan
- · Replies 37 ·
High School The position of a particle/electron question
- science_rules
- · Replies 9 ·
High School What would happen if a wave function disruptor was used on a table?
- bluecap
- · Replies 1 ·
Undergrad The speed of a "photon" in a multipath experiment?
- alikim
- · Replies 12 ·
Undergrad Quantum decoherence superposition of macroscopic object
- Quantum of Solace
- · Replies 1 ·
High School Does Rejecting Realism in Quantum Mechanics Ensure Consistent Predictions?
- Education246
- · Replies 10 ·
High School Is wave / particle duality linked to superposition?
- rede96
- · Replies 11 ·
Graduate Effect of visible light on conductivity
- EngPhy
- · Replies 2 ·
Undergrad Delayed choice quantum eraser with inconsistent signal and idler outcomes
- Cobalt101
- · Replies 1 ·
Graduate Approximating a QF with finite-dimensional Hilbert space
- hilbert2
- · Replies 20 ·
Undergrad How to antisymmetrize wavefunctions in multi-electron systems
- HAYAO
- · Replies 4 ·
Undergrad What is the energy due to Spin?
- jonjacson
- · Replies 15 ·
Undergrad Delayed choice two slit experiment - photon
- Cobalt101
- · Replies 1 ·
Undergrad Finding components in momentum representation
- IanBerkman
- · Replies 5 ·
Undergrad Two Identical non-entangled Particle System
- TimeRip496
- · Replies 3 ·
Undergrad 'speed' of spooky action vs delayed choice
- Quantum of Solace
- · Replies 17 ·
High School Bell's state measurement in the Bell basis
- limarodessa
- · Replies 3 ·
Undergrad Can the Planck equation be derived by considering phonons?
- Austin Daniel
- · Replies 1 ·
Undergrad What happens if the slit screen is removed between the slits and detector?
- alikim
- · Replies 1 ·
Undergrad Delayed choice - Bohr's experiment with a Camera
- pBrane
- · Replies 9 ·
Undergrad Is space infinitesimal? Can it be divided unlimited times?
- Tanelorn
- · Replies 10 ·
Graduate Atomic Orbitals and Symmetry
- hokhani
- · Replies 7 ·
Undergrad Do all particles reach the detector in a double slit experiment?
- ElMachoTaco
- · Replies 16 ·
Undergrad Wave functions for multi-electron atoms and atomic gases
- KFC
- · Replies 5 ·
High School What causes the cos²(θ/2) probability in electron spin detection?
- rede96
- · Replies 6 ·
Undergrad Was Heisenberg's uncertainty principle about measurement limitations or physical reality?
- Madi Araly
- · Replies 71 ·
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 ·