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
Graduate What is the Schrodinger Equation?
  • · Replies 6 ·
Replies
6
Views
4K
Graduate Gedankenexperiment on quantum entanglement
  • · Replies 6 ·
Replies
6
Views
2K
Graduate Orbital Angular Momentum and Uncertainty?
  • · Replies 2 ·
Replies
2
Views
5K
Graduate Measuring Angular Momentum for Free Particles: L-square =l(l+1)?
  • · Replies 19 ·
Replies
19
Views
3K
Graduate Light (wave and particle theory)
  • · Replies 6 ·
Replies
6
Views
4K
Graduate Plot a several energy eigenvalues of a partical
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Why Don't Electrons Collide in Orbit?
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Momentum operator for a free particle with a definite momentum and Energy
  • · Replies 3 ·
Replies
3
Views
6K
Graduate Coulomb potential removes the degnerecay of states
  • · Replies 7 ·
Replies
7
Views
2K
Graduate Is entanglement a fundamental resource for quantum information processing?
  • · Replies 5 ·
Replies
5
Views
3K
Graduate Grand unified theories and quantum mechanics
  • · Replies 5 ·
Replies
5
Views
2K
Graduate How do non-Hermitian Hamiltonians explain particle decay and quasi-bound states?
  • · Replies 5 ·
Replies
5
Views
5K
Graduate Understanding the Meaning of Infinity in Uncertainty Principle
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Solving using schrodinger equation techniques
  • · Replies 2 ·
Replies
2
Views
8K
Graduate Why do particles annhillate with their particles?
  • · Replies 29 ·
Replies
29
Views
7K
Graduate Are the stings in string theory, considered to be matter?
  • · Replies 51 ·
2
Replies
51
Views
9K
Graduate Is EPR Really as Confusing as It Seems in Quantum Physics?
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Entanglement criterion for identical particle
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Quark Generation: Are Most Quarks in the Universe in Their Least Massive Form?
  • · Replies 4 ·
Replies
4
Views
5K
Graduate How Do Quantum Well Transistors Transport Charge Carriers?
  • · Replies 1 ·
Replies
1
Views
3K
Graduate Symmetry of Quantum vs Classical Physics Systems
  • · Replies 2 ·
Replies
2
Views
2K
Graduate What is an effective field theory
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Beginner, wondering about wave functions
  • · Replies 8 ·
Replies
8
Views
3K
Graduate Projecting onto an eigenstate when we make a measurement
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Anyone know about flourescent dyes?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Comparing Photons & EM Waves in Physics
  • · Replies 32 ·
2
Replies
32
Views
10K
Graduate Baker-Campbell-Hausdorff formula question
  • · Replies 2 ·
Replies
2
Views
14K
Graduate About bases of complex (Hilbert) space
  • · Replies 4 ·
Replies
4
Views
3K
Graduate Question about angular momentum and spin
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Calculating Determinants of Operators
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Can Fourier Transformation be Used for Amplitude of a Free Particle?
  • · Replies 4 ·
Replies
4
Views
5K
Undergrad Game theory and quantum game theory
  • · Replies 1 ·
Replies
1
Views
4K
Graduate Energy of Electrostatic Charge ?
  • · Replies 7 ·
Replies
7
Views
3K
Graduate Dirac-Feynman-action principle and pseudo-differential operators
  • · Replies 3 ·
Replies
3
Views
4K
Graduate Hermite polynomial and transformation
  • · Replies 2 ·
Replies
2
Views
5K
Graduate What is the role of proper time in quantum theory
  • · Replies 14 ·
Replies
14
Views
4K
Graduate How Does the Stern-Gerlach Experiment Illustrate Quantum Spin Measurement?
  • · Replies 7 ·
Replies
7
Views
5K
Graduate Harmonic oscillator in a time-dependent force
  • · Replies 4 ·
Replies
4
Views
5K
Graduate Questions about the Double Slit Experiment
  • · Replies 3 ·
Replies
3
Views
3K
Graduate How to create charge from light?
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Integrals in the derivation of the Optical Theorem
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Factor of 'i' and antisymmetrization in Dirac Lagrangian
  • · Replies 7 ·
Replies
7
Views
5K
Graduate Quantum Mechanics and the Nature of Determinism
  • · Replies 30 ·
2
Replies
30
Views
5K
Graduate Reaching absolute zero and BEC
  • · Replies 1 ·
Replies
1
Views
3K
Undergrad Proton-electron interactions interms of photons
  • · Replies 49 ·
2
Replies
49
Views
12K
Graduate Meaning of zero probability density
  • · Replies 2 ·
Replies
2
Views
6K
Graduate Position space - momentum space
  • · Replies 18 ·
Replies
18
Views
17K
Undergrad Is interference always present in a single slit setup?
  • · Replies 11 ·
Replies
11
Views
4K
Graduate MS Renormalization: Questions & Answers
  • · Replies 3 ·
Replies
3
Views
3K
Graduate What are the key concepts in Srednicki's explanation of Feynman diagrams in QFT?
  • · Replies 35 ·
2
Replies
35
Views
9K
High School Zeno's Paradox (Quantum Level)
  • · Replies 1 ·
Replies
1
Views
2K
Graduate FAQ says refraction isn’t from absorption and emission
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Prove d (\delta x) = \delta (d x): Solutions & Tips
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Inherent impossibility of knowing both position and momentum
  • · Replies 12 ·
Replies
12
Views
3K
Graduate Inner product on boson one-particle space
  • · Replies 11 ·
Replies
11
Views
3K
Graduate How do you entangle particles?
  • · Replies 21 ·
Replies
21
Views
37K
Undergrad Light Wave Particle Confusion: Can 2 Exist in Same Place?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Need Help (not Homework question)
  • · Replies 6 ·
Replies
6
Views
2K
Graduate Solving the Entanglement Problem: A Quantum Mechanics Tutorial
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Old Quantum Theory = Oscillations?
  • · Replies 6 ·
Replies
6
Views
2K
Graduate Partial Trace For Tripartite Systems
  • · Replies 1 ·
Replies
1
Views
5K
Undergrad Recreating Thomas Young's Double Slit Experiment
  • · Replies 2 ·
Replies
2
Views
7K
Graduate Probability Amplitude and Time Evolution Operator
  • · Replies 1 ·
Replies
1
Views
3K
Graduate Solving Mark Srednicki QFT: Exact Propagator Problems (13.12, 13.13, 13.16)
  • · Replies 5 ·
Replies
5
Views
3K
Graduate Peculiar feature of a commutator, can anyone explain?
  • · Replies 9 ·
Replies
9
Views
3K
Graduate Electron tunneling and classic electrdynamics.
  • · Replies 4 ·
Replies
4
Views
2K
High School What Are Quantum Numbers and Spin in Physics?
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Hamiltonian for non-conservative forces?
  • · Replies 3 ·
Replies
3
Views
6K
Undergrad Why does glass feel as cold as metal despite being non-conductive?
  • · Replies 5 ·
Replies
5
Views
3K
Graduate Absorption/Emission of photons of specific frequency (Doppler Effect)
  • · Replies 3 ·
Replies
3
Views
4K
Graduate How can one build a non-trivial operator with a zero mean value?
  • · Replies 7 ·
Replies
7
Views
4K
Graduate Commutation relations in relativistic quantum theory
  • · Replies 7 ·
Replies
7
Views
8K
Graduate Magnetic Field in Natural Units: Expressing \hbar
  • · Replies 9 ·
Replies
9
Views
8K
Graduate Is a Year-Long Quantum Chromodynamics Class Worth the Exam Stress?
  • · Replies 12 ·
Replies
12
Views
3K
Graduate Is complex momentum density possible?
  • · Replies 5 ·
Replies
5
Views
3K
Graduate Can a particle's wavefunction become perfectly flat in empty space over time?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Study Lie Groups: G. 't Hooft's SU(2) Index Convention
  • · Replies 4 ·
Replies
4
Views
4K
Graduate Quantum Mechanical Scattering (3D) - What about forward scattering?
  • · Replies 2 ·
Replies
2
Views
5K
Graduate Creation Operator of Harmonic Oscillator
  • · Replies 2 ·
Replies
2
Views
3K
Graduate Why need *complex* wavefunction?
  • · Replies 57 ·
2
Replies
57
Views
13K
Graduate Ehrenfest theorem and Heisenberg quantum mechanics
  • · Replies 4 ·
Replies
4
Views
4K
Graduate Physics of Electron Probability Clouds
  • · Replies 17 ·
Replies
17
Views
6K
Can a simple wooden stick be used to send instant messages across space?
  • · Replies 6 ·
Replies
6
Views
3K
Graduate Eliminating the coincidence counter
  • · Replies 1 ·
Replies
1
Views
3K
Graduate Constructing Unitary Matrices for Rotations in Hilbert Space
  • · Replies 5 ·
Replies
5
Views
7K
Graduate Can Momentum be Calculated Without Measuring Position in Quantum Mechanics?
  • · Replies 4 ·
Replies
4
Views
3K
Graduate Relativistic quantum field theory:antiparticles
  • · Replies 33 ·
2
Replies
33
Views
6K
Undergrad Compton scattering contributes to color in any way?
  • · Replies 9 ·
Replies
9
Views
4K
Graduate Forced Harmonic Oscillator with Path Integral
  • · Replies 4 ·
Replies
4
Views
7K
Graduate Negative energy/imaginary momentum
  • · Replies 25 ·
Replies
25
Views
8K
Graduate Magnetic flux quanta in ground state hydrogen
  • · Replies 1 ·
Replies
1
Views
3K
Graduate Is Quantum Physics All About Total Randomness?
  • · Replies 10 ·
Replies
10
Views
2K
Graduate How do you determine that a particle is/was entangled?
  • · Replies 58 ·
2
Replies
58
Views
13K
Graduate Shrodinger Equation, where did it come from?
  • · Replies 4 ·
Replies
4
Views
5K
Graduate Schrodinger's Eqn: Harnessing Extra Dimensions?
  • · Replies 16 ·
Replies
16
Views
3K
Graduate Partial Measurement / Teleportation
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Is a photon's wavelength relative to the velocity of its source?
  • · Replies 16 ·
Replies
16
Views
5K
Graduate What is the purpose of trace in quantum mechanics?
  • · Replies 5 ·
Replies
5
Views
6K
Graduate Can Quantum Mechanics Explain Particle Behavior in Video Games?
  • · Replies 14 ·
Replies
14
Views
2K
Graduate Interference seen in a member of an entangled pair
  • · Replies 61 ·
3
Replies
61
Views
10K