Quantum Physics Forum

Post thread
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.

Quantum Interpretations and Foundations

Help me understand indeterminism in standard quantum mechanics
Graduate Eigenvalues of Hyperfine Hamiltonian
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Is the classical relation between energy and momentum valid in QM?
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Different reference frames in QM
  • · Replies 10 ·
Replies
10
Views
2K
Undergrad The Central Field Approximation for Many-Electron Atoms
  • · Replies 4 ·
Replies
4
Views
3K
Undergrad Does the wave function spread more quickly after it is observed?
  • · Replies 32 ·
2
Replies
32
Views
4K
Graduate Wave Function Collapse and Thermodynamic Irreversible Processes
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Classical Hayden-Preskill Randomizer
  • · Replies 1 ·
Replies
1
Views
772
Undergrad Angular Momentum Hydrogen Atom Problem: Physically Explained When L=0
  • · Replies 2 ·
Replies
2
Views
1K
Graduate Heisenberg Uncertainty Relation for mixed states
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad General Magnetic Dipole Moment For an Electron in an Atom
  • · Replies 10 ·
Replies
10
Views
1K
High School Beginner Question Regarding Entanglement
  • · Replies 19 ·
Replies
19
Views
2K
Graduate Proton Precession in Hydrogen-Rich Liquids
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad Can two photons cancel each other?
  • · Replies 11 ·
Replies
11
Views
3K
High School How Does the Observer Paradox in Anthropology Reflect on Cultural Understanding?
  • · Replies 27 ·
Replies
27
Views
3K
Undergrad Understanding Covalent Bonds: The Stability of Matter Explained
  • · Replies 8 ·
Replies
8
Views
3K
High School Photon absorption -- What happens to the excess energy?
  • · Replies 12 ·
Replies
12
Views
2K
Undergrad Solving Schrödinger's equation for a hydrogen atom with Euler's method
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Photon Emitted without Changing Energy Levels
  • · Replies 8 ·
Replies
8
Views
1K
Undergrad Possible to derive geodesics from the wavefunction?
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Why physicists cannot renormalize all divergent integrals?
  • · Replies 8 ·
Replies
8
Views
2K
High School Does the energy of an electron vary in the sublevels?
  • · Replies 10 ·
Replies
10
Views
2K
Undergrad Intuitive/classical picture of electron spin g-factor of 2?
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad 1D wavepacket scattering simulation, momentum distribution formula
  • · Replies 24 ·
Replies
24
Views
2K
High School Is there a magnetic interaction between light and charged particles?
  • · Replies 23 ·
Replies
23
Views
2K
High School The match rates in Bell Tests -- Lower than 50%?
  • · Replies 28 ·
Replies
28
Views
2K
High School Question about QM and Neuroscience
  • · Replies 4 ·
Replies
4
Views
1K
Undergrad Block Time & Action at a Distance
  • · Replies 11 ·
Replies
11
Views
1K
Undergrad QED - running of coupling (beta function)
  • · Replies 5 ·
Replies
5
Views
3K
Undergrad Understanding the Effects of Parities on the Stark Hamiltonian
  • · Replies 1 ·
Replies
1
Views
1K
Graduate How Do Feynman Diagrams Work in Phi^4 Theory?
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Constant beam, both slits analyzed double-slit experiment?
  • · Replies 6 ·
Replies
6
Views
1K
High School Does Quantum Eraser Prove That Intention Does Not Create Physical Reality?
  • · Replies 8 ·
Replies
8
Views
2K
Undergrad Renormalisation scale and running of the φ^3 coupling constant
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Shankar Quantum Mechanics, Chapter 5, Page 160-161
  • · Replies 2 ·
Replies
2
Views
1K
High School Translating Stephen Hawking: Plus/Minus Term & Black Holes
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Is there any physical significance to Wave Amplitude?
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad After entanglement swapping, how can we verify the new entanglement?
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad What is CV Bell State Measurement and How Does Entanglement Swapping Work?
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Is there a smallest wavetrain corresponding with photons?
  • · Replies 30 ·
2
Replies
30
Views
2K
Undergrad Green's function for massive photon theory
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad The Speed of Light: Comparing Photon and EM Wave Velocities
  • · Replies 6 ·
Replies
6
Views
1K
High School Theory about gravitons and space warping
  • · Replies 11 ·
Replies
11
Views
1K
Undergrad The time evolution of a Hamiltonian
  • · Replies 12 ·
Replies
12
Views
2K
Undergrad Discrete symmetries and conserved quantities
  • · Replies 5 ·
Replies
5
Views
3K
Undergrad Quantum Entanglement with Public Variables
  • · Replies 11 ·
Replies
11
Views
2K
Undergrad Coherent state evolution - nonlinear Hamiltonian
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Entanglement Witnesses close to GHZ states
  • · Replies 1 ·
Replies
1
Views
945
Undergrad The spin of quarks in an H dibaryon
  • · Replies 2 ·
Replies
2
Views
991
Undergrad Some questions about the photoelectric experiment
  • · Replies 13 ·
Replies
13
Views
2K
Undergrad Explaining the Continuous Diffraction Spectrum of a Heated Solid
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Change of variables in the Density of States function
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Qualitative description of stimulated emission & population inversion
  • · Replies 18 ·
Replies
18
Views
2K
Undergrad What does motion mean in quantum mechanics?
  • · Replies 27 ·
Replies
27
Views
3K
Undergrad Precession of spin in a magnetic field
  • · Replies 10 ·
Replies
10
Views
4K
Undergrad Why is a laser's beam parallel?
  • · Replies 22 ·
Replies
22
Views
2K
Undergrad On the Rydberg Constant and the Emission Lines
  • · Replies 6 ·
Replies
6
Views
1K
Undergrad Can the Exact Boltzmann Distribution Yield Specific Quantum State Populations?
  • · Replies 5 ·
Replies
5
Views
2K
Graduate Massive Vector Field: Questions & Answers
  • · Replies 3 ·
Replies
3
Views
5K
Undergrad Quantum mechanics supports solipsism?
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad 100 boxes of Length L, an application of the famous Particle in A Box
  • · Replies 11 ·
Replies
11
Views
2K
High School Modern Physics: Charge of Discovered Particles
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad To measure a Planck length would require a black-hole photon?
  • · Replies 10 ·
Replies
10
Views
2K
Undergrad Is there an uncertainty between amplitude and phase in an EM wave?
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad How does this experimental result show photon emission?
  • · Replies 11 ·
Replies
11
Views
2K
High School How is the measurement done for the double slit experiment?
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Trying to get a physical understanding of a Fermi gas
  • · Replies 2 ·
Replies
2
Views
1K
High School Understanding Single Photon Detection in the Double-Slit Experiment
  • · Replies 17 ·
Replies
17
Views
3K
Undergrad Quantities in the Heisenberg Uncertainly Principle
  • · Replies 5 ·
Replies
5
Views
1K
Graduate Are all quantum computers feedforward networks?
  • · Replies 14 ·
Replies
14
Views
3K
Undergrad What stands for probability in QFT?
  • · Replies 6 ·
Replies
6
Views
1K
Undergrad Excited system in a harmonic potential
  • · Replies 4 ·
Replies
4
Views
1K
High School Photon detection methods -- do they always involve displacing an electron?
  • · Replies 23 ·
Replies
23
Views
2K
Graduate First Course in Graduate Quantum Mechanics Resources
  • · Replies 1 ·
Replies
1
Views
966
Undergrad Matrix Notation for potential in Schrodinger Equation
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad The derivative of the complex conjugate of the wave function
  • · Replies 29 ·
Replies
29
Views
6K
Graduate Thought experiment in relativistic quantum mechanics?
  • · Replies 4 ·
Replies
4
Views
1K
Undergrad Can we quantize a static EM field?
  • · Replies 22 ·
Replies
22
Views
2K
Undergrad Does mean velocity equal group velocity of wave packets in QM?
  • · Replies 5 ·
Replies
5
Views
1K
High School Double slit question - how far apart can the slits be?
  • · Replies 8 ·
Replies
8
Views
4K
Graduate Density Operators, Trace and Partial Trace
  • · Replies 2 ·
Replies
2
Views
6K
Undergrad Classical equivalent of scalar free field in QFT
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad What does this tricky quantum mechanics equation mean?
  • · Replies 3 ·
Replies
3
Views
1K
Graduate Dirac Notation: Why is order reversed in ket expasion?
  • · Replies 4 ·
Replies
4
Views
1K
Graduate Quantum CSP Algorithm for Aircraft Recovery Problem
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Does the Wigner-Eckart theorem require good quantum numbers?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Conditional phase shift for Grover's algorithm
  • · Replies 2 ·
Replies
2
Views
2K
High School How to construct 4 in+out Feynman diagram from 3 Feynman diagram?
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad How to interpret integration by parts
  • · Replies 11 ·
Replies
11
Views
2K
High School Questions about double slit experiments
  • · Replies 33 ·
2
Replies
33
Views
4K
Undergrad Number of photons in an arbitrary EM field
  • · Replies 35 ·
2
Replies
35
Views
4K
High School Why do we know all photons have same speed as the speed of light?
  • · Replies 39 ·
2
Replies
39
Views
4K
Undergrad What is difference between EM wave and EM field?
  • · Replies 12 ·
Replies
12
Views
2K
Undergrad Equivalence of these quantum circuits
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Black holes -- Can you chill the particles of a black hole?
  • · Replies 7 ·
Replies
7
Views
1K
Graduate Dispersion of the wave packet over time
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Where Can I Find the Proof of Asymptotically Helical Trajectory in a Lattice?
  • · Replies 1 ·
Replies
1
Views
949
Undergrad A statement in a superposition of being true and false?
  • · Replies 7 ·
Replies
7
Views
2K
Undergrad Are all processes CPT symmetric like measurement, stimulated emission?
  • · Replies 8 ·
Replies
8
Views
2K
High School U.Delft Quantum Results - Is the explanation parsimonious?
  • · Replies 12 ·
Replies
12
Views
1K
Graduate Interface between Biological Physics and Quantum Physics
  • · Replies 11 ·
Replies
11
Views
2K