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 "The wavefunction never collapses"
High School Help with Bell states and measurements
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Question about noise in entanglement experiments
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad In NMR, Why does longitudinal magnetization decrease when....
  • · Replies 1 ·
Replies
1
Views
2K
Graduate How to numerically diagonalize a Hamiltonian in a subspace?
  • · Replies 4 ·
Replies
4
Views
4K
Undergrad Exploring the Lamb Shift: G-Factor & Angular Momentum
  • · Replies 1 ·
Replies
1
Views
2K
High School How are outer products quantum states?
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Quantum interpretations reduced to absurd, in a nutshell
  • · Replies 6 ·
Replies
6
Views
3K
Graduate What is best way to start learning DMRG for Fermions?
  • · Replies 2 ·
Replies
2
Views
3K
High School Quantum entanglement phenomenon
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad What is the relation between chemical potential and the number of particles?
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Does the Bell theorem assume reality?
  • · Replies 220 ·
8
Replies
220
Views
24K
High School Doesn't the choice of measurement prove free will
  • · Replies 65 ·
3
Replies
65
Views
7K
Graduate Is QM Foundations Facing a Crisis?
  • · Replies 31 ·
2
Replies
31
Views
7K
High School Help with math in a quantum circuit
  • · Replies 6 ·
Replies
6
Views
3K
Graduate How to choose the number of particles per site in Fermionic DMRG?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Perturbation solution and the Dirac equation
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Stationary states vs. the unitary time evolution operator
  • · Replies 3 ·
Replies
3
Views
3K
Undergrad Electrons and the Pauli exclusion principle
  • · Replies 22 ·
Replies
22
Views
3K
Graduate Derive / verify Legendre P (cos x)
  • · Replies 2 ·
Replies
2
Views
2K
High School Whats the principle behind Schuster Focusing?
  • · Replies 1 ·
Replies
1
Views
16K
High School Can someone explain to me what's the Schrodingers cat?
  • · Replies 7 ·
Replies
7
Views
3K
Undergrad Electrostatic repulsion at a distance
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad PROOF: Quantum Fidelity with pure states
  • · Replies 7 ·
Replies
7
Views
3K
Undergrad Human eyes can detect single photons?
  • · Replies 19 ·
Replies
19
Views
4K
Undergrad Electrons in Quantum Field Theory: A Composite Excitation
  • · Replies 9 ·
Replies
9
Views
3K
Undergrad Phase shift after double-slit for entangled photons
  • · Replies 5 ·
Replies
5
Views
3K
Undergrad "Breaking the loop" in Casimir force?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Does Bell's theorem imply nonlocality using a false assumption
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad Assumptions made in stationary-state scattering
  • · Replies 4 ·
Replies
4
Views
3K
High School Entanglement Decay of a proton pair
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Integration of the Outer Product of a Basis
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Why is the Phase Shift in Grover's Algorithm Applied to All Elements Except 0?
  • · Replies 4 ·
Replies
4
Views
3K
Graduate Uncertainty principle, removing infinity in the Fourier Transform
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Quantum Entangled Living Bacteria
  • · Replies 14 ·
Replies
14
Views
3K
Undergrad How does magnetism work in QM?
  • · Replies 2 ·
Replies
2
Views
2K
High School Interference fringes, what if you sample them?
  • · Replies 53 ·
2
Replies
53
Views
6K
Undergrad C-G coefficients and Angular momentum
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad How does an electron interact in QFT?
  • · Replies 6 ·
Replies
6
Views
3K
Undergrad Inner product of a vector with an operator
  • · Replies 6 ·
Replies
6
Views
2K
High School Is Uncertainty in Quantum Mechanics a Fundamental Limit or a Measurement Issue?
  • · Replies 9 ·
Replies
9
Views
2K
High School Are Quantum Entities in Macro Sized Objects Entangled?
  • · Replies 22 ·
Replies
22
Views
3K
Undergrad Qualitative description of particles in QFT
  • · Replies 15 ·
Replies
15
Views
5K
Undergrad Calculate Revival Time of a Wave in Griffiths' QM 2nd Ed.
  • · Replies 1 ·
Replies
1
Views
3K
Undergrad Complex conjugate of an inner product
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Why particles have group velocity?
  • · Replies 7 ·
Replies
7
Views
2K
Undergrad Electron Repulsion in QFT: How Does It Work in Quantum Field Theory?
  • · Replies 5 ·
Replies
5
Views
3K
High School Understanding Entangled Electrons: Creation, Isolation, and Observation
  • · Replies 8 ·
Replies
8
Views
2K
Undergrad How does stimulated emission work in the process of light amplification?
  • · Replies 6 ·
Replies
6
Views
3K
Undergrad Integration being unchanged after rotation
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Do I need energy to measure position without uncertainty?
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Visualizing the Attached EM Field for Free Electron in QFT
  • · Replies 19 ·
Replies
19
Views
3K
Undergrad Novel Schrodinger equation examples for 1D
  • · Replies 5 ·
Replies
5
Views
3K
Undergrad Casimir force and the Vacuum Field
  • · Replies 13 ·
Replies
13
Views
3K
Undergrad Double slit with a quarter wave polarizer on one slit
  • · Replies 3 ·
Replies
3
Views
2K
High School NOVA Show on Einstein and Quantum Entanglement
  • · Replies 9 ·
Replies
9
Views
2K
Graduate Dipole moment of an isolated quantum system
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad One-Dimensional System: Boundary Condition Applicability
  • · Replies 1 ·
Replies
1
Views
1K
Insights How I Stopped Worrying and Learned to Love Orthodox Quantum Mechanics - Comments
  • · Replies 287 ·
10
Replies
287
Views
29K
Graduate Wave functions for positrons and electrons
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Franck-Hertz: Overall behaviour of the current
  • · Replies 1 ·
Replies
1
Views
3K
Undergrad Why does a mercury Franck-Hertz tube produce visible light?
  • · Replies 3 ·
Replies
3
Views
3K
High School Superposition of traps (thought experiment)
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Annihilation vs. Creation Operators: What's the Difference?
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Quantum Oscillator in 1D: How Can a Real Particle Have an Imaginary Velocity?
  • · Replies 3 ·
Replies
3
Views
2K
High School Are all particles and photons entangled?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate The effect of macroscopic quantum phenomena on human evolution
  • · Replies 1 ·
Replies
1
Views
2K
Graduate The different interference patterns in the double-slit experiment
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad The component of the total spin in the direction of H
  • · Replies 1 ·
Replies
1
Views
11K
Undergrad Quantum Physics in Biology & Medicine: Research & Advances
  • · Replies 8 ·
Replies
8
Views
2K
Undergrad Understanding the Spin-Statistics Theorem: A Modern Notation Approach
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Info traveling faster than light, and quantum entanglement
  • · Replies 7 ·
Replies
7
Views
2K
Undergrad Diffraction experiments with one particle at a time?
  • · Replies 8 ·
Replies
8
Views
2K
Undergrad Math: classical to quantum locality
  • · Replies 12 ·
Replies
12
Views
2K
High School The Spectral Gap and Quantum Vacuum Fluctuations
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Hermitian and expectation values.... imaginary?
  • · Replies 20 ·
Replies
20
Views
4K
Graduate Entangled wave function solved perturbatively
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Quantum mechanical integral equation problem
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Please help explain the probability density function
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Space and time dependence of entangled particles
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Double-slit experiment: Alternating results
  • · Replies 11 ·
Replies
11
Views
2K
Graduate Particle Spinning: Why and What Happens If They Stop?
  • · Replies 31 ·
2
Replies
31
Views
5K
Undergrad Wave function collapse in a double slit experiment
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad How close do electrons and positrons have to be to interact?
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Why we do not need the total Lagrangian?
  • · Replies 10 ·
Replies
10
Views
2K
Graduate Quantum fields and the harmonic oscillator
  • · Replies 4 ·
Replies
4
Views
2K
High School Why Do We See Distinct Lines in Atomic Emission and Absorption Spectra?
  • · Replies 17 ·
Replies
17
Views
4K
Undergrad Hyperfine structure - Hamiltonian and bases
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Is the electromagnetic field of an electron in QFT a real physical field?
  • · Replies 11 ·
Replies
11
Views
2K
Undergrad What is the significance of coupling in surface plasmons and plasmon polaritons?
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Polarization of light and probability
  • · Replies 17 ·
Replies
17
Views
3K
Undergrad Understanding Redshift: The Role of Relative Motion between Emitter and Absorber
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Difference between preparing and measuring
  • · Replies 15 ·
Replies
15
Views
2K
High School Layman question about faster than light communication
  • · Replies 56 ·
2
Replies
56
Views
9K
Undergrad Multiplication of ladder-operators
  • · Replies 1 ·
Replies
1
Views
3K
Undergrad Quantum State: Electron, Proton, and Neutron Explained
  • · Replies 1 ·
Replies
1
Views
2K
High School Entropy -- What exactly is it?
  • · Replies 6 ·
Replies
6
Views
2K
Graduate Green's function for the wave function
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Is the Fenna-Matthews-Olson complex a quantum dot?
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Does quantum entanglement depend on the chosen basis?
  • · Replies 37 ·
2
Replies
37
Views
7K
Graduate Fermi-Dirac statistics, finding all electron configurations
  • · Replies 3 ·
Replies
3
Views
2K