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 Electron wavefunction as an overlap of orbitals
- WrongMan
- · Replies 3 ·
Undergrad Why can you write the solution in this form?
- cristianbahena
- · Replies 1 ·
Undergrad Are quantum harmonic oscillators and radiation modes equal?
- Suekdccia
- · Replies 1 ·
Graduate What does a CPT transformation do to particle properties?
- Geonaut
- · Replies 14 ·
Graduate Bright, dark soliton for cubic-quintic nonlinear Schrodinger
- dongsh2
- · Replies 1 ·
High School How did we measure the mass of Quarks?
- mpolo
- · Replies 5 ·
Undergrad Wave-Particle Duality of Electrons
- Gia Reinhart
- · Replies 10 ·
High School Why only certain colors in emission spectrum are visible?
- Toleisnon
- · Replies 6 ·
Undergrad Does realism imply locality or vice versa?
- Sunny Singh
- · Replies 120 ·
Undergrad What is an Eigenstate in Relation to Schrodinger Equation?
- CookieSalesman
- · Replies 15 ·
Undergrad Shor Algorithm - Post measurement state
- Ricardo Belchior
- · Replies 7 ·
High School Does photon arrival time vary with interference fringe position?
- Andy_K
- · Replies 16 ·
Undergrad Does reality really exist when not measured?
- Trollfaz
- · Replies 11 ·
Undergrad Cosmological constant estimation in QFT
- ueit
- · Replies 1 ·
High School How does string theory fit with QFT?
- member 623540
- · Replies 2 ·
Undergrad Why not describing the radiatation of atom spectrum by TDSE
- zhouhao
- · Replies 7 ·
Graduate Key problems in classical and quantum measurement
- A. Neumaier
- · Replies 30 ·
Graduate DC conductivity limit of susceptibility with imaginary frequency shift
- lichen1983312
- · Replies 11 ·
Undergrad Could Wormholes and Entanglement Be Connected?
- Quantum of Solace
- · Replies 2 ·
Graduate Classical intr. ang mom and quantum intr ang mom relation
- fisher garry
- · Replies 1 ·
Graduate Challenges to QED from hyperfine measurements
- tom.stoer
- · Replies 9 ·
Undergrad Partially entangled(W), Maximally and disentangled states
- Noora Alameri
- · Replies 1 ·
Undergrad Effect of Homog./Non-Homog. Magnetic Field in Heisenberg Spin System
- Noora Alameri
- · Replies 1 ·
Undergrad Bose-Einstein condensates coherence
- Bone Rasta
- · Replies 1 ·
Undergrad What mathematics do I need to learn quantum physics?
- Michel Raskin
- · Replies 4 ·
High School How decoherence destroys superpositions
- jaydnul
- · Replies 31 ·
Undergrad Does quantum mechanics refute materialism?
- SeoKyu
- · Replies 2 ·
Undergrad Do Bell experiments disprove local realism?
- SeoKyu
- · Replies 2 ·
Undergrad Transition state of electrons in molecules
- goldenboy
- · Replies 8 ·
Undergrad Factorising expectation values
- dyn
- · Replies 4 ·
Undergrad Smallest possible orbit and velocity of a particle?
- jamie.j1989
- · Replies 2 ·
Undergrad Build Your Own Quantum Entanglement Experiment?
- Steven Ellet
- · Replies 27 ·
Undergrad Why probability current = 0 at infinity? Why must wavefunction be continuous?
- Happiness
- · Replies 4 ·
Undergrad What's the significance of the phase in a coherent state?
- vancouver_water
- · Replies 5 ·
Undergrad Differences in photons from protons vs photons from e-?
- Idunno
- · Replies 6 ·
Undergrad Is the Phase Velocity of a Massive Particle Representing Anything Physical?
- LarryS
- · Replies 11 ·
Undergrad Is Bell's Theorem Valid Despite Fundamental Theoretical Loopholes?
- facenian
- · Replies 39 ·
Undergrad Is the Fermion number operator squared equal to itself?
- voila
- · Replies 9 ·
Graduate Do Haag's theorem and Wightman axioms solve real problems in QFT?
- ftr
- · Replies 61 ·
High School Quantum tunneling - Questions about some pop-science claims
- Jeronimus
- · Replies 11 ·
High School When do we know where an object is
- Daniel Huren
- · Replies 6 ·
High School Bell Non Locality, Quantum Non Locality, Weak Locality, CDP
- Point Conception
- · Replies 80 ·
High School Question about a beam of light
- Mosio
- · Replies 3 ·
High School How can something be "Zero Dimensional?"
- MSparks6
- · Replies 7 ·
Undergrad Inequality for the time evolution of an overlap
- Dyatlov
- · Replies 1 ·
Undergrad Neutron Stars: Flipping Up Quarks to Down Quarks
- WildBill
- · Replies 2 ·
Undergrad Particle antiparticle creation
- Michel Raskin
- · Replies 4 ·
Undergrad A particle measured in a too high potential
- DarkBabylon
- · Replies 1 ·
Undergrad Can a confined electron field propagate through a spherical barrier in QFT?
- asimov42
- · Replies 16 ·
High School Double Slit Experiment: Detection around slit?
- Andy_K
- · Replies 4 ·
Undergrad How to compute second-order variation of an action?
- Frank Castle
- · Replies 6 ·
Undergrad Electron jelly model and Hydrogen Atom
- jonjacson
- · Replies 7 ·
Undergrad The Fundamental Nature of Angular Momentum in Quantum Mechanics
- Jezza
- · Replies 3 ·
High School Do electrons have color like light does?
- GAURAV DADWAL
- · Replies 2 ·
Graduate Wigner-Eckart theorem and reduced matrix element
- Tilde90
- · Replies 3 ·
Undergrad Identical Particle States in a Unidimensional Box
- JamesHG
- · Replies 2 ·
Undergrad Heat energy: statistical mechanics vs atomic orbitals
- Zebulin
- · Replies 4 ·
Graduate Proof of equation 2.64 for harmonic oscillator ladder operators
- SherLOCKed
- · Replies 3 ·
Graduate Can Zeta ζ(½+it) be interpreted as a Wave function?
- Jason C
- · Replies 2 ·
Graduate Operators in Quantum Mechanics
- Sheldon Cooper
- · Replies 7 ·
Undergrad Is quantum tunneling in biology still an active research area?
- sophiecentaur
- · Replies 31 ·
Undergrad Electron capture and electron transitions.
- oksuz_
- · Replies 1 ·
Undergrad Arithmetic Block in Shor Algorithm
- Ricardo Belchior
- · Replies 5 ·
Graduate Operation of Hamiltonian roots on wave functions
- SherLOCKed
- · Replies 1 ·
Undergrad Adding types of angular momenta
- Jezza
- · Replies 18 ·
Undergrad Can a free electron absorb and re-emit a photon in Compton scattering?
- RS6
- · Replies 52 ·
Undergrad Laser vs photodiodes and spectra
- Frank-95
- · Replies 7 ·
High School Why does waveform exp[iwt] have negative kinetic energy?
- Happiness
- · Replies 3 ·
Undergrad Can electron wavefunction amplitudes change from zero to nonzero instantaneously?
- asimov42
- · Replies 7 ·
Undergrad Pauli spin matrices and Eigen spinors
- Rahulrj
- · Replies 1 ·
Undergrad Bell's theorem and Superdeterminism
- ueit
- · Replies 16 ·
Undergrad What counts as measurement in quantum mechanics?
- Efuhvex
- · Replies 5 ·
Undergrad What Came First the Magnet or the Field?
- Dadface
- · Replies 43 ·
Undergrad Angular momentum operator commutation relation
- Bernard
- · Replies 5 ·
High School Is Inversion Symmetry Found in Nature or Technology?
- lcr2139
- · Replies 1 ·
Undergrad Orbital angular momentum of light
- Spinnor
- · Replies 11 ·
Undergrad Time independent Schrodinger equation results (1D)
- WrongMan
- · Replies 3 ·
Undergrad Renormalisation and the Landau pole
- Dadface
- · Replies 20 ·
Undergrad Why does SU(2) have 3 parameters/generators like the SO(3)?
- TimeRip496
- · Replies 1 ·
Undergrad Do the vacuum states created by soft photons have vacuum flu
- Suekdccia
- · Replies 3 ·
Undergrad Examples of quantum objects behaving like neither waves nor particles
- LarryS
- · Replies 1 ·
Undergrad How does time reversal invariance work with a falling ball?
- Silviu
- · Replies 1 ·
Undergrad Why does classical wave packet uncertainty lead to ΔkΔx~1?
- CookieSalesman
- · Replies 3 ·
Graduate Vacuum polarization at intermediate distances
- ftr
- · Replies 2 ·
Undergrad Single-mode field quantization Hamiltonian
- ja!
- · Replies 2 ·
Undergrad Maximally entangled state expression and generalization
- Noora Alameri
- · Replies 9 ·
Undergrad Why do I get to a contradiction?
- Gjmdp
- · Replies 4 ·
High School How to change electron and proton charge
- Quantum Velocity
- · Replies 8 ·
Undergrad Why do spin-1/2 kets rotate in ordinary 3D space if they live in 2D Hilbert space?
- mindarson
- · Replies 5 ·
Graduate Can a Point-Like Particle Defy the Uncertainty Principle?
- mikeyork
- · Replies 24 ·
Graduate Physics Challenge by QuantumQuest #1
- Greg Bernhardt
- · Replies 25 ·
Undergrad Information Theory and Entropy
- Arman777
- · Replies 10 ·
Graduate Peskin/Schroeder 4.77 page (about cross-sections)
- Manu_
- · Replies 2 ·
Graduate Non-Heisenberg Uncertainty Relations
- Larry
- · Replies 15 ·
Graduate Double slit experiment wave interference?
- Mario Rossi
- · Replies 24 ·
High School Double slit and randomly functioning measuring devices
- phillovix
- · Replies 13 ·
High School Energy of Gamma Ray Photon with Wavelength h
- Daniel Petka
- · Replies 9 ·
Undergrad Klein-Gordon Operator: Creating Particles at Position x
- Silviu
- · Replies 3 ·
High School Trying to understand the double-slit experiment
- Bruce Barron
- · Replies 12 ·
High School Does a photon travel in a straight line when its probability amplitude is zero?
- Daniel Petka
- · Replies 13 ·