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

Undergrad On computing quantum waves exactly from classical action
High School What caused the asymmetry between matter and antimatter in the early universe?
  • · Replies 6 ·
Replies
6
Views
3K
Undergrad What is Meant by Measured in the Context of Electron Position?
  • · Replies 20 ·
Replies
20
Views
3K
High School A programmer's point of view of 2 quantum physics principles
  • · Replies 3 ·
Replies
3
Views
1K
High School Electromagnetic fields of fundamental particles -- help please
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad Confusion about Dirac Notation (interferometer)
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Classical vs quantum wave amplitudes?
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad Question: Quantum Dot Laser - Energy Band
  • · Replies 2 ·
Replies
2
Views
3K
High School Can clocks explain the probability of finding a particle in motion?
  • · Replies 4 ·
Replies
4
Views
2K
High School Some questions about "superdeterminism" and Bell's Theorem
  • · Replies 75 ·
3
Replies
75
Views
13K
Undergrad Binding energy in QM and in GR
  • · Replies 7 ·
Replies
7
Views
2K
High School Non-deterministic Hidden variables that can't be described by math
  • · Replies 3 ·
Replies
3
Views
2K
High School Poor man's double slit etc. setup
  • · Replies 36 ·
2
Replies
36
Views
5K
Undergrad So, do vacuum fluctuations exist?
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Wave function measurement question
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad How are degrees of freedom understood in QM?
  • · Replies 3 ·
Replies
3
Views
3K
Undergrad Fourier conjugates and momentum
  • · Replies 45 ·
2
Replies
45
Views
4K
Undergrad Can Spin State Recombination Restore the Original Quantum State?
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Why does intensity mean anything if there's a complex number
  • · Replies 8 ·
Replies
8
Views
3K
Undergrad Countable or Uncountable Cardinality of Multiverse?
  • · Replies 4 ·
Replies
4
Views
3K
Undergrad Can we operate with several operators at once on a state?
  • · Replies 1 ·
Replies
1
Views
1K
High School Quantum entanglement and potential wells
  • · Replies 5 ·
Replies
5
Views
2K
High School Is there a tension between QM and QFT?
  • · Replies 9 ·
Replies
9
Views
2K
Undergrad Does the Compton Effect Challenge the Particle Nature of Light?
  • · Replies 7 ·
Replies
7
Views
2K
Undergrad Difference between CHSH and Bell inequalities
  • · Replies 5 ·
Replies
5
Views
3K
High School Can you detect stationary bosons?
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad When does superposition collapse or entanglement take place
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Calculating Helicity in Non-Relativistic Quantum Mechanics using Pauli Matrices
  • · Replies 3 ·
Replies
3
Views
2K
High School Superposition particles in a box
  • · Replies 7 ·
Replies
7
Views
2K
High School Wave function deterministic yet not classical
  • · Replies 12 ·
Replies
12
Views
2K
High School Black hole information paradox and determinism
  • · Replies 12 ·
Replies
12
Views
2K
Undergrad Can Bound States Leak and How Do Scattering States Behave?
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Questions Regarding Free Particles - Griffith's QM (I)
  • · Replies 10 ·
Replies
10
Views
4K
Undergrad Spin 1/2 representation of a particle
  • · Replies 8 ·
Replies
8
Views
3K
Undergrad Deriving the equations of QM/QFT
  • · Replies 21 ·
Replies
21
Views
3K
Undergrad Calculating Relativistic Phase and Group Velocity
  • · Replies 10 ·
Replies
10
Views
4K
High School Understanding Excitation Energy in Atoms: Threshold Values and Potential States
  • · Replies 3 ·
Replies
3
Views
2K
Graduate The Lagrangian Density and Equations of Motion
  • · Replies 3 ·
Replies
3
Views
3K
Undergrad Two slit experiment w baseballs
  • · Replies 5 ·
Replies
5
Views
2K
High School Psi-ontic view, macro objects and decoherence
  • · Replies 38 ·
2
Replies
38
Views
5K
High School How Does Detector Placement Affect Ratios in the Double Slit Experiment?
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad Exact value for every observable in QM?
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Concerning concioussnes and the double slit experiment.
  • · Replies 2 ·
Replies
2
Views
2K
High School Some very basic questions around the double slit experiment
  • · Replies 14 ·
Replies
14
Views
2K
Undergrad (Apparent?) paradoxes - Classical/Quantum theory predictions
  • · Replies 18 ·
Replies
18
Views
2K
Undergrad How do you understand EPR & Bell's Theorem?
  • · Replies 47 ·
2
Replies
47
Views
6K
Undergrad How to study a particle with several features?
  • · Replies 8 ·
Replies
8
Views
2K
Undergrad Does QFT explain macroscopic objects?
  • · Replies 1 ·
Replies
1
Views
1K
High School Entangled Photon Measurements: A(t) = d/c and B(t) = 5d/c
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Why do electrons behave as classical particles when they are far apart?
  • · Replies 7 ·
Replies
7
Views
2K
Graduate Bound states and the energy-momentum relation....
  • · Replies 20 ·
Replies
20
Views
3K
Undergrad Is a Quantum-Controlled Mirror Possible?
  • · Replies 2 ·
Replies
2
Views
1K
Graduate Virtual Fermions and Pauli Principle
  • · Replies 2 ·
Replies
2
Views
2K
High School How is Bohr's atom model convenient with quantum mechanics?
  • · Replies 3 ·
Replies
3
Views
2K
High School Conditions for paired electrons
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Observable particles as asymptotic states....
  • · Replies 47 ·
2
Replies
47
Views
6K
Undergrad Hamiltonian after transformation to interaction picture
  • · Replies 2 ·
Replies
2
Views
3K
Undergrad Does QM allow for a photon to travel at 800,000 km/s?
  • · Replies 8 ·
Replies
8
Views
2K
Undergrad Is Hawking Radiation unique? (And one more question)
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Can zero dimensional QFT be real?
  • · Replies 9 ·
Replies
9
Views
2K
Undergrad Entanglement-questions photons
  • · Replies 1 ·
Replies
1
Views
1K
High School Exciting an H-Atom: Effects on Kinetic Energy
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Quantum Tunneling Max Distance
  • · Replies 29 ·
Replies
29
Views
4K
Undergrad Hilbert space in Everettian QM
  • · Replies 18 ·
Replies
18
Views
3K
High School Why did Max Planck assume discrete energy values?
  • · Replies 22 ·
Replies
22
Views
5K
Undergrad Why is Quantum Gravity theory still not "finished"?
  • · Replies 44 ·
2
Replies
44
Views
7K
Undergrad "Observer Effect" referring to two different things?
  • · Replies 39 ·
2
Replies
39
Views
7K
Graduate Can entanglement swapping determine the absolute velocity of an object?
  • · Replies 15 ·
Replies
15
Views
3K
High School Collision of photon and proton
  • · Replies 4 ·
Replies
4
Views
3K
Undergrad Double slits seen from the plane
  • · Replies 2 ·
Replies
2
Views
1K
High School So Quantum Fluctuations don't exist?
  • · Replies 54 ·
2
Replies
54
Views
6K
High School Is the Momentum Explanation in Marcella's Paper Consensus Among Physicists?
  • · Replies 26 ·
Replies
26
Views
4K
Undergrad Help with an expectation value formula
  • · Replies 12 ·
Replies
12
Views
2K
Graduate Interference in electron conductance through e.g. molecule?
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Quantum Collapse: Understanding The Mystery
  • · Replies 8 ·
Replies
8
Views
2K
High School Energy absorbed by an electron
  • · Replies 9 ·
Replies
9
Views
2K
Undergrad Is there a simplified spin-orbit coupling equation?
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Is the Hamilton-Jacobi Formalism a Classical Analogue to Quantum Wave Functions?
  • · Replies 62 ·
3
Replies
62
Views
7K
Undergrad TIR (total internal reflection) in terms of quantum world
  • · Replies 3 ·
Replies
3
Views
2K
High School Particle pair creation probability
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Why the velocity operator commutes with position (Dirac equation)
  • · Replies 1 ·
Replies
1
Views
2K
High School Avoiding unexpected observations
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Find a calculation of Schrödinger's cat experiment?
  • · Replies 34 ·
2
Replies
34
Views
4K
Undergrad Can the PBR Theorem Prove the Reality of Quantum States?
  • · Replies 91 ·
4
Replies
91
Views
9K
Undergrad How does quantum entanglement communication work?
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad What's the physics description of "existence" ?
  • · Replies 4 ·
Replies
4
Views
2K
High School Does Heisenberg's uncertainty principle imply no free will?
  • · Replies 54 ·
2
Replies
54
Views
7K
Undergrad 3-particle or more entanglement…
  • · Replies 59 ·
2
Replies
59
Views
6K
Undergrad Finite universe, quantized linear momentum, and the HUP....
  • · Replies 10 ·
Replies
10
Views
2K
Undergrad Why do waves need to match object size for interaction?
  • · Replies 9 ·
Replies
9
Views
3K
High School Gravitational radiation on transition?
  • · Replies 6 ·
Replies
6
Views
1K
Undergrad Principle of superposition of states
  • · Replies 14 ·
Replies
14
Views
3K
Undergrad Applying the Principle of Relativity to Quantum Mechanics
  • · Replies 16 ·
Replies
16
Views
3K
Undergrad Is all correlation related to quantum entanglement?
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad QM Incompleteness: Can We Predict Uncertainty?
  • · Replies 43 ·
2
Replies
43
Views
6K
High School Does QM state that Space is made of nothing?
  • · Replies 30 ·
2
Replies
30
Views
4K
High School Question regarding Light by Light Scattering
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Understanding Quantum Cascade Lasers
  • · Replies 3 ·
Replies
3
Views
2K
High School Does QM implicitly define an aether?
  • · Replies 23 ·
Replies
23
Views
3K
Graduate Charge conjugation in Peskin and Schroeder
  • · Replies 4 ·
Replies
4
Views
4K
Undergrad Constant particle motion due to zero-point energy....
  • · Replies 4 ·
Replies
4
Views
2K