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 Shankar Quantum Mechanics, Chapter 5, Page 160-161
- DaddyGriffiths
- · Replies 2 ·
High School What does Stephen Hawking mean by the plus-minus term in black holes?
- Nuno_S_Oliveira
- · Replies 2 ·
Undergrad Is there any physical significance to Wave Amplitude?
- reis1212
- · Replies 6 ·
Undergrad After entanglement swapping, how can we verify the new entanglement?
- r20
- · Replies 5 ·
Undergrad What is CV Bell State Measurement and How Does Entanglement Swapping Work?
- James2018
- · Replies 2 ·
Undergrad Is there a smallest wavetrain corresponding with photons?
- fxdung
- · Replies 30 ·
Undergrad Green's function for massive photon theory
- JD_PM
- · Replies 3 ·
Undergrad Do photon and EM wave velocities differ in a medium?
- fxdung
- · Replies 6 ·
High School Theory about gravitons and space warping
- CallMeDirac
- · Replies 11 ·
Undergrad The time evolution of a Hamiltonian
- Llukis
- · Replies 12 ·
Undergrad Discrete symmetries and conserved quantities
- dRic2
- · Replies 5 ·
Undergrad Quantum Entanglement with Public Variables
- mplummer
- · Replies 11 ·
Undergrad Coherent state evolution - nonlinear Hamiltonian
- CptXray
- · Replies 1 ·
Graduate Entanglement Witnesses close to GHZ states
- Danny Boy
- · Replies 1 ·
Undergrad The spin of quarks in an H dibaryon
- Keru
- · Replies 2 ·
Insights What is the Anatomy of Compton Scattering?
- neilparker62
- · Replies 2 ·
Undergrad Some questions about the photoelectric experiment
- rtareen
- · Replies 13 ·
Undergrad Why does a heated solid produce continuous spectrum instead of line spectrum?
- rtareen
- · Replies 2 ·
Undergrad Change of variables in the Density of States function
- AndersF
- · Replies 2 ·
Undergrad How stimulated emission and population inversion work together in lasers
- rtareen
- · Replies 18 ·
Undergrad What does motion mean in quantum mechanics?
- sergiokapone
- · Replies 27 ·
Undergrad Precession of spin in a magnetic field
- docnet
- · Replies 10 ·
Undergrad Why is a laser's beam parallel?
- fxdung
- · Replies 22 ·
Undergrad On the Rydberg Constant and the Emission Lines
- Gabrielmonteiro
- · Replies 6 ·
Undergrad Can the Exact Boltzmann Distribution Yield Specific Quantum State Populations?
- rabbed
- · Replies 5 ·
Graduate Lorenz gauge in massive vector fields and degrees of freedom
- Aleolomorfo
- · Replies 3 ·
Undergrad Quantum mechanics supports solipsism?
- Johnny5454
- · Replies 1 ·
Undergrad 100 boxes of Length L, an application of the famous Particle in A Box
- PhysicsTruth
- · Replies 11 ·
High School Modern Physics: Charge of Discovered Particles
- Theus_ferreira
- · Replies 3 ·
Undergrad To measure a Planck length would require a black-hole photon?
- swampwiz
- · Replies 10 ·
Undergrad Is there an uncertainty between amplitude and phase in an EM wave?
- fxdung
- · Replies 6 ·
Undergrad How does this experimental result show photon emission?
- rtareen
- · Replies 11 ·
High School How is the measurement done for the double slit experiment?
- brajesh
- · Replies 3 ·
Undergrad Trying to get a physical understanding of a Fermi gas
- MarkL
- · Replies 2 ·
High School Understanding Single Photon Detection in the Double-Slit Experiment
- jeremyfiennes
- · Replies 17 ·
Undergrad Quantities in the Heisenberg Uncertainly Principle
- Kremmellin
- · Replies 5 ·
Graduate Are all quantum computers feedforward networks?
- Agrippa
- · Replies 14 ·
Undergrad What stands for probability in QFT?
- fxdung
- · Replies 6 ·
Undergrad Excited system in a harmonic potential
- Malamala
- · Replies 4 ·
High School Photon detection methods -- do they always involve displacing an electron?
- jeremyfiennes
- · Replies 23 ·
Graduate First Course in Graduate Quantum Mechanics Resources
- Frank Schroer
- · Replies 1 ·
Undergrad Matrix Notation for potential in Schrodinger Equation
- skynelson
- · Replies 6 ·
Undergrad The derivative of the complex conjugate of the wave function
- Tony Hau
- · Replies 29 ·
Graduate Thought experiment in relativistic quantum mechanics?
- Someone_physics
- · Replies 4 ·
Undergrad Can we quantize a static EM field?
- fxdung
- · Replies 22 ·
Undergrad Does mean velocity equal group velocity of wave packets in QM?
- fxdung
- · Replies 5 ·
High School Double slit question - how far apart can the slits be?
- brajesh
- · Replies 8 ·
Graduate Density Operators, Trace and Partial Trace
- skynelson
- · Replies 2 ·
Undergrad Classical equivalent of scalar free field in QFT
- eoghan
- · Replies 5 ·
Undergrad What does this tricky quantum mechanics equation mean?
- Ali Beladi
- · Replies 3 ·
Graduate Dirac Notation: Why is order reversed in ket expasion?
- RoadDog
- · Replies 4 ·
Graduate Quantum CSP Algorithm for Aircraft Recovery Problem
- Francis
- · Replies 1 ·
Undergrad Does the Wigner-Eckart theorem require good quantum numbers?
- Decimal
- · Replies 2 ·
Graduate Conditional phase shift for Grover's algorithm
- Francis
- · Replies 2 ·
High School How to construct 4 in+out Feynman diagram from 3 Feynman diagram?
- Martian2020
- · Replies 2 ·
Undergrad How to interpret integration by parts
- Tony Hau
- · Replies 11 ·
High School Questions about double slit experiments
- rede96
- · Replies 33 ·
Undergrad Number of photons in an arbitrary EM field
- Dale
- · Replies 35 ·
High School Why do we know all photons have same speed as the speed of light?
- fxdung
- · Replies 39 ·
Undergrad What is difference between EM wave and EM field?
- fxdung
- · Replies 12 ·
Undergrad Equivalence of these quantum circuits
- lholmes135
- · Replies 3 ·
Undergrad Black holes -- Can you chill the particles of a black hole?
- caybrax
- · Replies 7 ·
Graduate Dispersion of the wave packet over time
- abeer-0101
- · Replies 1 ·
Graduate Where Can I Find the Proof of Asymptotically Helical Trajectory in a Lattice?
- intervoxel
- · Replies 1 ·
Undergrad A statement in a superposition of being true and false?
- Happiness
- · Replies 7 ·
Undergrad Are all processes CPT symmetric like measurement, stimulated emission?
- Jarek 31
- · Replies 8 ·
High School U.Delft Quantum Results - Is the explanation parsimonious?
- ndvcxk123
- · Replies 12 ·
Graduate Interface between Biological Physics and Quantum Physics
- AryaKimiaghalam
- · Replies 11 ·
Graduate Conditional time evolution entropy and the experimenter?
- Someone_physics
- · Replies 3 ·
Undergrad "Packing of energy" question related to the ultraviolet catastrophe
- brajesh
- · Replies 6 ·
Undergrad Quantum Computing "Not" Operation - Mathematics Steps For Deriving It
- Sparky_
- · Replies 2 ·
High School Electron gun alignment and decoherence in double slit experiment
- PainterGuy
- · Replies 17 ·
Graduate Hamiltonian commutes with a parity operator -- What does that mean?
- LagrangeEuler
- · Replies 7 ·
High School Particles with small Wavelengths passing through huge slits?
- InfiniteMonkey
- · Replies 8 ·
Graduate Understanding Counter Term Renormalization in Quantum Field Theory
- mandy96
- · Replies 4 ·
Undergrad Why is Planck's constant not called Wien's constant?
- AVentura
- · Replies 26 ·
Undergrad Realizing a Quantum Mechanical Watch-Stop
- Someone_physics
- · Replies 4 ·
Graduate Quantum tomography: Where does the magic happen?
- Jufa
- · Replies 2 ·
Graduate Fock spaces with indefinite metric in QFT and string theory
- dx
- · Replies 13 ·
Graduate What is a good basis for coupled modes in a resonator?
- Supantho Raxit
- · Replies 2 ·
Graduate Feynman solution for the radial wave function of the hydrogen atom
- emilionovati
- · Replies 4 ·
Graduate Path Integrals in Wolfram Mathematica
- Mitya
- · Replies 3 ·
Graduate Position is no more an operator in QFT
- Heidi
- · Replies 5 ·
Undergrad Matrix construction for spinors
- shinobi20
- · Replies 1 ·
Undergrad Parity Eigenstates: X Basis Explanation
- Nitram
- · Replies 2 ·
Graduate Restricted Boltzmann machine for Quantum state tomography
- Jufa
- · Replies 5 ·
Undergrad Can a State with Nonmeasurable Local Properties be Described by Quantum Rules?
- jk22
- · Replies 2 ·
Undergrad Indistinguishable particles in separate boxes
- Swamp Thing
- · Replies 9 ·
High School Fermions, Pauli and antisymmetry
- imsmooth
- · Replies 5 ·
High School Does the wave function change from the viewpoint of the photon?
- Martian2020
- · Replies 24 ·
Undergrad Why does "control" mean "coherency" in Wigner's friend paradox?
- SEYED2001
- · Replies 13 ·
Graduate Wavefunction of the Universe considering all possible boundaries?
- Suekdccia
- · Replies 1 ·
Undergrad Bell measurement of distant particles
- Heidi
- · Replies 3 ·
High School Do Photons Decay or Have a Half-Life?
- mess
- · Replies 25 ·
High School Gravitational signature of a photon in a double slit experiment
- Herbascious J
- · Replies 75 ·
Undergrad Are hydrogen atom energy levels the energies of the electron or the atom?
- LagrangeEuler
- · Replies 17 ·
Undergrad Justification of a trick in solving PDEs arising in Physics
- fluidistic
- · Replies 93 ·
Undergrad Can the Born rule be understood as time evolution forwards and backwards?
- jcap
- · Replies 5 ·
Undergrad Why is it that when anti-matter and matter meet they produce energy?
- danielhaish
- · Replies 17 ·
High School Is a photon an excitation of the electromagnetic field?
- entropy1
- · Replies 13 ·