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 Extracting Energy from the Casimir Effect
- Quaoar
- · Replies 8 ·
Undergrad For proton and electron of identical energy encounter same potential
- somebody-nobody
- · Replies 1 ·
Graduate Quantum Mechanics Killed My Cat
- franznietzsche
- · Replies 1 ·
Graduate Questions in the quantum theory of radiation
- Abu Abdallah
- · Replies 4 ·
Graduate Rotating Dirac particle current
- Wiemster
- · Replies 2 ·
Graduate What is the connection between Feynman's arrow and Schrödinger's psi?
- eb227
- · Replies 7 ·
Graduate High Temperature Superconductivity: Can Two Electrons Interact?
- KAZSyed
- · Replies 8 ·
Graduate 3D harmonic oscillator ground state
- StatusX
- · Replies 11 ·
Graduate Why can't SR explain why electrons do not crash into the nucleus?
- Andrew Mason
- · Replies 69 ·
Graduate What is the physical meaning of the position operator in QFT?
- weisheme
- · Replies 3 ·
Graduate Questions on Entanglement and Double-Slit Experiment
- RProgrammer
- · Replies 169 ·
Graduate Why is negative potential energy mass external to particles, not distributed in them?
- pej.dgr
- · Replies 2 ·
Graduate What Happens to an Electron During Quantum Tunneling?
- KAZSyed
- · Replies 5 ·
Graduate How does an electron emit a photon?
- Swapnil
- · Replies 2 ·
Graduate Twin slits; state preparation
- cesiumfrog
- · Replies 3 ·
Graduate When does an accelerated electron not radiate?
- pej.dgr
- · Replies 4 ·
Graduate Does Spacetime Noncommutativity Extend to Macroscopic Scales?
- selfAdjoint
- · Replies 0 ·
Graduate Electron Question: Is Electron a Superposition of Sizes?
- Canute
- · Replies 7 ·
Graduate Is Angular Momentum Quantized Due to Non-Commutable Rotations?
- lark
- · Replies 4 ·
Graduate Particle in Box: Zero Probability Density at Certain Points
- somebody-nobody
- · Replies 3 ·
Graduate What happens to a field after annihilation?
- Leo.Ki
- · Replies 6 ·
Graduate Is 'local realism' a meaningful term in Bell's Theorem?
- DrChinese
- · Replies 153 ·
High School Where photons will stop being themselves
- Kunzite
- · Replies 2 ·
Graduate Age of a particle and related considerations
- Leo.Ki
- · Replies 4 ·
Graduate Understanding Borel transform (sum) in QM
- Karlisbad
- · Replies 1 ·
Graduate Where can I find a good account of functional methods in QFT?
- simon.wang
- · Replies 2 ·
Graduate Exponential operator expansion for exp(ÂB̂)
- MaverickMenzies
- · Replies 7 ·
Graduate Does Bohr's model of Hydrogen atom violate the uncertainty principle?
- somebody-nobody
- · Replies 1 ·
Graduate Schrodinger's Black Hole: Can we ever know what happens inside?
- malthis
- · Replies 1 ·
Graduate Can a particle be in two places at once?
- excentricmonk
- · Replies 11 ·
Graduate Harmonic Oscillator Operators?
- scarecrow
- · Replies 3 ·
Undergrad Square of wave function gives us the probability density
- ahsaas
- · Replies 4 ·
Graduate Photodetector in single-slit experiment
- Chaos' lil bro Order
- · Replies 5 ·
Graduate Wavefunction collapse in position, momentum and energy measurements
- QuantumDefect
- · Replies 3 ·
Graduate Why the photon-electron thought experiment doesn't derive the uncertainty principle
- loom91
- · Replies 5 ·
Graduate Linearity of Schrodinger Equation
- dainylee
- · Replies 4 ·
Graduate Klein-Gordon vs Schrodinger-Fock Equation
- ahsaas
- · Replies 2 ·
Graduate Interpreting the Harmonic Oscillator
- actionintegral
- · Replies 2 ·
Graduate Does Wick Rotation Change the Physics in Quantum Field Theory?
- argonurbawono
- · Replies 3 ·
Graduate Commutator of a density matrix and a real symmetric matix
- Einstein Mcfly
- · Replies 2 ·
Graduate Virtual particles and velocities greater than C
- ice109
- · Replies 4 ·
Graduate Commutation Relations: Relativistic Quantum Mechanics
- touqra
- · Replies 3 ·
Graduate Is the vacuum of space really devoid of 'everything'?
- Chaos' lil bro Order
- · Replies 4 ·
Graduate Hermiticity and expectation value
- holden
- · Replies 6 ·
Graduate The Meaning of Purity in Entanglement
- MaverickMenzies
- · Replies 3 ·
Graduate Delayed Choice Quantum Erasure Demystified
- bruce2g
- · Replies 16 ·
Graduate Fundamental Process of an electron absorbing a photon
- Abu Abdallah
- · Replies 37 ·
Graduate Move over, quantum cryptography
- Loren Booda
- · Replies 2 ·
Graduate How Do Dipole Moments Affect Molecular Energy in Electric Fields?
- StatusX
- · Replies 1 ·
Graduate What is the explanation for the 25% probability in Bell's Gedanken Experiment?
- rlduncan
- · Replies 13 ·
Undergrad Why do magnets attract or repel each other?
- blumfeld0
- · Replies 2 ·
Graduate Books for Quantum field theory?
- Nikos
- · Replies 6 ·
Graduate Where to find Schrödinger's 1926 quantum mechanics papers and De Broglie's duality proof
- Useful nucleus
- · Replies 4 ·
Graduate Does destroying particle a make particle b's state unknown again?
- jnan014
- · Replies 25 ·
Graduate Does the Equivalence principle holds in QM.
- Karlisbad
- · Replies 7 ·
Graduate Teleportation (new Danish experiment with light and cesium atoms)
- marcus
- · Replies 5 ·
Graduate How does QM handle time-varying forces without potential energy?
- quasar987
- · Replies 4 ·
High School I hear a lot about nonlocality and it's relationship to QM
- actionintegral
- · Replies 3 ·
Graduate Eading in many books that the unification of quantum mechanics
- Milind_shyani
- · Replies 12 ·
Graduate Quantum Mechanics and Determinism?
- Dooga Blackrazor
- · Replies 82 ·
Graduate Fundamental process of a photon elastically scattering from an electon
- actionintegral
- · Replies 17 ·
Graduate Hilbert space of direct products
- Wiemster
- · Replies 1 ·
Graduate How Do Force Particles Like Photons and Gluons Exert Attraction?
- daniel_i_l
- · Replies 2 ·
Graduate About violation of Bell's inequalities
- charlylebeaugosse
- · Replies 58 ·
Graduate Why do symmetry and Hamiltonian operators commute?
- Wiemster
- · Replies 3 ·
High School How can light travel through vacuum if waves need a medium?
- Karthikeyan
- · Replies 5 ·
Graduate How do we know a state function will stay normalized?
- esradw
- · Replies 6 ·
Graduate Is the Relativistic Mass of Light Affecting Quantum Experiments?
- ptabor
- · Replies 5 ·
Graduate Deriving the orthogonality relation for Legendre polynomials
- gulsen
- · Replies 14 ·
Graduate 2-slits, 2-observers, 2-languages, 2-outcomes ?
- tbitz
- · Replies 3 ·
Graduate Why do quantum and classical particles both transmit through a potential step when E > V?
- scarecrow
- · Replies 2 ·
Graduate Operators in a three level system
- dantypas
- · Replies 4 ·
Graduate Single-particle interference observed for macroscopic objects
- kvantti
- · Replies 28 ·
High School Protons + Neutrons + Electrons =?
- Dominisi
- · Replies 6 ·
Graduate Is it true that unitary transform in QM corresponds to canonical transform
- kakarukeys
- · Replies 1 ·
High School What Is an Electron?
- Verblun
- · Replies 8 ·
Graduate What is the phenomenon of synchronized electron orbits?
- Duster
- · Replies 6 ·
Graduate Learning QFT from Peskin and Schroeder
- Son Goku
- · Replies 7 ·
Graduate The vacuum in QFT. What is it. Why have it. Does everyone believe in it?
- CarlB
- · Replies 47 ·
Graduate Does the time arrow depend on energy loss rather than entropy?
- shaun11
- · Replies 6 ·
Graduate Can a screen both measure spin and show interference patterns?
- shaun11
- · Replies 8 ·
Graduate Born Conditions on Wavefunctions
- scarecrow
- · Replies 5 ·
Graduate Walk Through Walls - Wave Variance and You
- Bunting
- · Replies 7 ·
Undergrad Resonance square experiment with wave function
- Orion1
- · Replies 4 ·
Graduate Can wall patterns change after erasing which-slit information later?
- cornernote
- · Replies 7 ·
Graduate Probability of zero in stationary wave state
- knightpraetor
- · Replies 4 ·
Graduate How can the particle fit in the well then?
- touqra
- · Replies 3 ·
Graduate Do Particles Always Follow Fixed Laws in the Universe?
- Hanny
- · Replies 1 ·
Graduate Wave/Particle duality experiment?
- waht
- · Replies 1 ·
Graduate Stern-Gerlach Experiment: Spin Orbit Coupling
- eep
- · Replies 1 ·
Graduate The time before sentient beings
- graffix
- · Replies 2 ·
Graduate Fowler Nordheim Tunnelling -
- shreekumarc
- · Replies 6 ·
Graduate Why does quadrature error propagation differ from linear propagation?
- opticaltempest
- · Replies 2 ·
Graduate Speed of universe and quantum theory
- Not too smart
- · Replies 6 ·
Graduate Double slit experiment with macroscopic size objects
- wonderingingatineau
- · Replies 6 ·
Graduate Quantum Mechanics for Military Officers
- marcus
- · Replies 3 ·
Graduate Wien's displacement law. A paradox
- lightarrow
- · Replies 8 ·
Graduate Minimum Uncertainty Wavefunction
- luckymango
- · Replies 2 ·
Graduate Harmonic Oscillator with fermions
- milesAhead
- · Replies 1 ·
High School Visualizing the Atom: Find a Way to See Inside
- mistersmith
- · Replies 7 ·