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

Graduate Understanding Barandes' microscopic theory of causality
Graduate Why can we apply the symmetries of S-Matrix to part of Feynman diagram
  • · Replies 6 ·
Replies
6
Views
2K
Graduate The Schrodinger Equation: How to Solve for Time Evolution and Eigenstates
  • · Replies 9 ·
Replies
9
Views
3K
Graduate Is the interference of Fullerene due to the center-of-mass approximation?
  • · Replies 10 ·
Replies
10
Views
3K
Graduate Can exited states exist without a ground state?
  • · Replies 3 ·
Replies
3
Views
2K
Graduate How to show that cloning by measurement is impossible?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Quantum Entanglement for the layman?
  • · Replies 17 ·
Replies
17
Views
5K
Graduate Adding angular momenta using levi-civta symbol
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Paired electrons in a magnetic field
  • · Replies 5 ·
Replies
5
Views
2K
Graduate Problem with quantum FTL communications
  • · Replies 6 ·
Replies
6
Views
2K
Graduate Does all quantum particles exist?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Trace of operator with continuous spectrum
  • · Replies 22 ·
Replies
22
Views
8K
Graduate Quantum Entangled Emitter and Receiver
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Could the hidden variables be encoded in the observer?
  • · Replies 6 ·
Replies
6
Views
3K
Graduate Mathematically what causes wavefunction collapse?
  • · Replies 129 ·
5
Replies
129
Views
14K
Graduate Lee Smolin Real Ensemble I. questions
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Are Eigenstates of a Wavefunction Entangled?
  • · Replies 29 ·
Replies
29
Views
4K
Graduate Energy of an Infinite Square Well
  • · Replies 13 ·
Replies
13
Views
10K
Graduate Why do we conjugate operators in QFT?
  • · Replies 3 ·
Replies
3
Views
1K
Graduate Nonlinear Optics: Split Method & Results
  • · Replies 7 ·
Replies
7
Views
2K
Graduate Expectation value of a hermitian operator prepared in an eigenstate
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Not understanding cosmological constant in field theory
  • · Replies 3 ·
Replies
3
Views
2K
Graduate What is the relationship between creation and annihilation operators in k-space?
  • · Replies 4 ·
Replies
4
Views
3K
Graduate Van del waals interaction in qm
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Is chirality dependent on the representation of the gamma matrices?
  • · Replies 2 ·
Replies
2
Views
4K
Graduate Quantum Principles of Quantum Computers
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Intuition behind superposition probabilities?
  • · Replies 14 ·
Replies
14
Views
3K
Graduate Understanding Dirac Notation in Quantum Mechanics
  • · Replies 6 ·
Replies
6
Views
2K
Graduate Understanding Potential Energy in QM
  • · Replies 5 ·
Replies
5
Views
3K
Graduate Understanding the Double-Slit Experiment: Photon Direction and Predictions
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Gauge forces and internal symmetries
  • · Replies 9 ·
Replies
9
Views
2K
Graduate Is Heisenbergs uncertainty principle valid?
  • · Replies 8 ·
Replies
8
Views
3K
Graduate Free particle wavefunction represent a fixed profile= wavepacket?
  • · Replies 2 ·
Replies
2
Views
3K
Graduate Schrödinger theory, bunch of questions
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Expectation value for non commuting operator
  • · Replies 12 ·
Replies
12
Views
5K
Graduate What does it mean to quantize a field
  • · Replies 4 ·
Replies
4
Views
8K
Graduate Has Wave Function Collapse Been Verified Experimentally ?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Is the Double Slit Experiment Key to Understanding Quantum Mechanics?
  • · Replies 10 ·
Replies
10
Views
3K
Graduate What is the relationship between proton and electron spin in atoms?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Quantum harmonics oscillator at high temperature
  • · Replies 3 ·
Replies
3
Views
2K
Graduate What is wavefunction in the time-dependent schrodinger equation?
  • · Replies 6 ·
Replies
6
Views
2K
Graduate Conservation of angular momentum (central force)
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Coherent States: Ʃ(|α|2)n = 1?
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Time-dependent SE for 'discrete' time steps
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Photons as virtual particles in High energy
  • · Replies 22 ·
Replies
22
Views
4K
Graduate Entangled Particles: Can They Be Distinguished?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate How to determine the product of two Hermitian operators is Hermitian
  • · Replies 7 ·
Replies
7
Views
16K
Graduate Could element 137 electrons become superluminal in a retrocausal atom?
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Combine Hamiltonians of two different bases
  • · Replies 13 ·
Replies
13
Views
2K
Graduate Why are wavefunctions represented as eigenvectors?
  • · Replies 11 ·
Replies
11
Views
3K
Graduate Why all the clinging to locality?
  • · Replies 96 ·
4
Replies
96
Views
26K
Graduate Using Quantum Dots for Single Photon Creation in Lab Research
  • · Replies 8 ·
Replies
8
Views
2K
Graduate Pauli's exclusion principle
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Find Frequency of Molecular Vibration for Melanin, Serotonin, & Insulin
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Where to learn the matrix formulation of QM
  • · Replies 3 ·
Replies
3
Views
2K
Graduate What causes the electron spin collapse
  • · Replies 13 ·
Replies
13
Views
3K
Graduate Feynman Lectures and Uncertainty Principle
  • · Replies 6 ·
Replies
6
Views
3K
Graduate Are Bound States Always Entangled in Quantum Mechanics?
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Simple electron recoil question
  • · Replies 7 ·
Replies
7
Views
2K
Graduate Interaction between wavefunction of two particles
  • · Replies 16 ·
Replies
16
Views
3K
Graduate Solving [H,x] Operator Algebra
  • · Replies 2 ·
Replies
2
Views
7K
Graduate Contractions of indices of the 4-vectors
  • · Replies 2 ·
Replies
2
Views
1K
Graduate The phrase, predictions of quantum mechanics
  • · Replies 22 ·
Replies
22
Views
4K
Graduate Why is wave/particle duality so hard to imagine?
  • · Replies 7 ·
Replies
7
Views
2K
Graduate Open Problems in Interplay between QM & 2nd Law of Thermodynamics?
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Phrase 'the field is in [certain] representation of a [certain] group'
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Has this experiment been done?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Emission of photons by vibrational relaxation of molecules
  • · Replies 12 ·
Replies
12
Views
7K
Graduate What does 0 amplitude mean in waves and quantum physics?
  • · Replies 5 ·
Replies
5
Views
5K
Graduate Direct calculation of the propagator
  • · Replies 3 ·
Replies
3
Views
2K
Graduate What is the physical meaning for a particle in harmonic oscillator ?
  • · Replies 11 ·
Replies
11
Views
3K
Graduate Rotation and Boost Commutating on the Same Axis
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Understanding N-point Correlation Functions in Particle Scattering Processes
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Why can you only contract one field in the Wilson approach to renormalization?
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Uncertainty principle asymmetric with respect to time?
  • · Replies 7 ·
Replies
7
Views
2K
Undergrad Orbitals and Nucleus - Quick question
  • · Replies 2 ·
Replies
2
Views
1K
Graduate Adding Angular Momentum is commutative, right?
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Can Two Photons Really Form Bound States?
  • · Replies 4 ·
Replies
4
Views
3K
Undergrad Why are waves represented as complex numbers?
  • · Replies 10 ·
Replies
10
Views
7K
Graduate Sum or Integral? Understanding the Calculation of Casimir Effect Measurements
  • · Replies 2 ·
Replies
2
Views
1K
Graduate Double delta function potential: two bound states vs one ?
  • · Replies 2 ·
Replies
2
Views
5K
Graduate Question about quantum of excitations in QED
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Probability rate of calculation
  • · Replies 2 ·
Replies
2
Views
1K
Graduate Unbound particle through potential
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Hamiltonian matrix off diagonal elements?
  • · Replies 4 ·
Replies
4
Views
6K
Graduate Fermions and Coherent States: What's the Connection?
  • · Replies 9 ·
Replies
9
Views
3K
Graduate Do photons carry more than energy, momentum and angular momentum?
  • · Replies 44 ·
2
Replies
44
Views
18K
Graduate Where is the boundary between quantum and classical mechanics?
  • · Replies 11 ·
Replies
11
Views
2K
Graduate Solving Schrödinger Equation: Step-by-Step Tutorial
  • · Replies 18 ·
Replies
18
Views
4K
Graduate Is Velocity in Quantum Mechanics Meaningless?
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad Feynman lectures and electron path
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Many Particle in a one dimensional box
  • · Replies 5 ·
Replies
5
Views
2K
Graduate Rotation of Spin Operator and Vector in 3D Space
  • · Replies 1 ·
Replies
1
Views
3K
Graduate What Is the Physical Significance of Planck Units and Their Derivation?
  • · Replies 4 ·
Replies
4
Views
3K
Graduate UP regarding value of a field and its rate of change
  • · Replies 5 ·
Replies
5
Views
1K
Graduate Sommerfeld uncertainty principle
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Antimatter Why does it annhiliate on contact with ordinary matter?
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Is the Number of Colors in QCD Limited to Just 3?
  • · Replies 5 ·
Replies
5
Views
2K
Graduate Entanglement to speak faster than light
  • · Replies 15 ·
Replies
15
Views
3K
High School Confusing that light is the only wave that doesn't move through
  • · Replies 7 ·
Replies
7
Views
2K
Graduate Why does particle size affect EM radiation scattering
  • · Replies 2 ·
Replies
2
Views
2K