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 Is Spin Networks Still Relevant in Quantum Gravity Research Today?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Solving Carbon Nanotube Model with Lz & Ly Expectation Values
  • · Replies 3 ·
Replies
3
Views
1K
Graduate Time derivative of creation/annhilation operators
  • · Replies 3 ·
Replies
3
Views
4K
Graduate Simultaneity of Uncertainty Principle
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Why are Bell's inequalities violated?
  • · Replies 97 ·
4
Replies
97
Views
18K
Graduate Gaussian function to derive Heisenberg's uncertainty principle
  • · Replies 19 ·
Replies
19
Views
7K
Graduate Constructing a Toffoli gate with qubit gates?
  • · Replies 1 ·
Replies
1
Views
3K
Graduate Collapse of state vector for continuous eigenvalues
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Paul Dirac's 1933 research paper
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Proving Pauli Matrices are Generators of SU(2)
  • · Replies 11 ·
Replies
11
Views
10K
Graduate Will an electron vibrating in a 1D radiates?
  • · Replies 7 ·
Replies
7
Views
2K
Graduate Understanding Spin Orbit Coupling: Deriving the Hamiltonian
  • · Replies 1 ·
Replies
1
Views
2K
Graduate About interchange phase of identical particles in Weinberg's QFT book
  • · Replies 5 ·
Replies
5
Views
2K
Graduate A question about Heizenberg uncertainty.
  • · Replies 8 ·
Replies
8
Views
2K
Graduate I don't understand why -1/2 is the higher energy level and +1/2 is the
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Group velocity in infinite square well
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Black body and continuous spectrum
  • · Replies 3 ·
Replies
3
Views
3K
Graduate I am getting into a mess with the HUP
  • · Replies 12 ·
Replies
12
Views
3K
Graduate A question on the product of two real linear operators
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad The heck with the Cat, what about the Human?
  • · Replies 8 ·
Replies
8
Views
2K
Graduate What is the state vector after measuring
  • · Replies 7 ·
Replies
7
Views
5K
Graduate Understanding the Translational Operator and Its Applications
  • · Replies 10 ·
Replies
10
Views
4K
Graduate What is a pure quantum state and a mixed quantum state?
  • · Replies 4 ·
Replies
4
Views
3K
Graduate Maxwell's equations from U(1) symmetry
  • · Replies 5 ·
Replies
5
Views
6K
Graduate Is radioactive decay reversible in time?
  • · Replies 2 ·
Replies
2
Views
6K
Graduate Quantum Communication: Two-Way Messaging Without Physical Link?
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Is the Book's Photon Calculation Off by a Factor of 1000?
  • · Replies 5 ·
Replies
5
Views
3K
Graduate Heisenberg's uncertainty principle invalidated?
  • · Replies 23 ·
Replies
23
Views
4K
Graduate Questions about entanglement from a non-physicist
  • · Replies 12 ·
Replies
12
Views
2K
Graduate Interference pattern calculations for unequal slits per QM theory
  • · Replies 5 ·
Replies
5
Views
3K
Graduate Isomorphism symmetry group of 6j symbol
  • · Replies 4 ·
Replies
4
Views
2K
Simple Normalization/schrodinger equation problem
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Diffraction and Probability Amplitude
  • · Replies 7 ·
Replies
7
Views
2K
High School What is Orbital Angular Momentum?
  • · Replies 3 ·
Replies
3
Views
5K
Graduate Quantum mechanics in multiple dimensions
  • · Replies 9 ·
Replies
9
Views
2K
Undergrad Quantization of Energy: Planck's Constant & Standing Waves
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Is the wave-function description of photon location incomplete?
  • · Replies 8 ·
Replies
8
Views
2K
Graduate Proof that all operators are linear
  • · Replies 12 ·
Replies
12
Views
2K
Graduate Quantum field theory, photons, and polarization.
  • · Replies 9 ·
Replies
9
Views
3K
Graduate The Nature of Knowledge in Quantum Mechanics
  • · Replies 30 ·
2
Replies
30
Views
5K
Graduate Double slit experiment - no interference in the vicinity of light
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Fermionic Number Operator Help
  • · Replies 19 ·
Replies
19
Views
3K
Graduate Normalizing a wave function - how the integration is done?
  • · Replies 7 ·
Replies
7
Views
4K
Graduate Best way to solve Schrodinger's wave equation numerically.
  • · Replies 4 ·
Replies
4
Views
3K
Graduate Terms in the Yang-Mills Lagrangian
  • · Replies 17 ·
Replies
17
Views
5K
High School Helo, I am just wondering about some info I foind on the web.
  • · Replies 7 ·
Replies
7
Views
2K
Undergrad Understanding SHM: Calculating the Wave Function of a Simple Harmonic Wave
  • · Replies 4 ·
Replies
4
Views
4K
Graduate Finding the Eigen Value of A.σ Vector Product
  • · Replies 6 ·
Replies
6
Views
3K
Graduate Is this a good definition of entanglement
  • · Replies 3 ·
Replies
3
Views
1K
Graduate Can someone give me some examples on the schrodinger equation?
  • · Replies 1 ·
Replies
1
Views
1K
Graduate What is the difference between a wave of water and qm wave?
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Question about potential well schrodinger
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Do angular momentum operators anti-commute?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Couple of quantum fluctuation related questions from a curious layman
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Minimal Subsitution from Lorentz Invariance
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Why are there multiple Slater determinants for the same number of electrons?
  • · Replies 10 ·
Replies
10
Views
3K
Graduate Dirac Equation: Gamma Matrices as 4-Vector Components?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Spin-orbit coupling for s-orbital states
  • · Replies 9 ·
Replies
9
Views
8K
Graduate Can Measuring One Spin Disentangle Electrons?
  • · Replies 14 ·
Replies
14
Views
3K
Graduate What is the physical meaning of [H,ρ ]=0 for a stationary state?
  • · Replies 6 ·
Replies
6
Views
3K
Graduate What is the concept behind the Uncertainty Principle?
  • · Replies 5 ·
Replies
5
Views
2K
Graduate Is this the HUP or diffraction?
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad P-subshell orbital of Hydrogen
  • · Replies 7 ·
Replies
7
Views
3K
Graduate Why are only some photons virtual?
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Entanglement happens at what speed?
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Born Rule Derivation: A Closer Look
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Virtual particles vs. real particles
  • · Replies 12 ·
Replies
12
Views
6K
Graduate How Do Photons Mediate Attraction Between Oppositely Charged Particles?
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Photoelectric effect - Frequency vs. Current
  • · Replies 6 ·
Replies
6
Views
8K
Graduate Diagonal Matrix & Perturbation Theory in Quantum Mechanics
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Planck's Derivation of Quantization: Summation vs Integrand
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Variational Method vs Inverse Rayleigh Method with Shifting
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Is Bell's theorem near-sighted?
  • · Replies 20 ·
Replies
20
Views
4K
Graduate Is This the Correct Method for Quantizing the Scalar Field?
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Peskin & Schroeder QFT Born Approximation reference.
  • · Replies 6 ·
Replies
6
Views
5K
Graduate Understanding the Bethe-Salpeter Equation: Introduction and Examples
  • · Replies 8 ·
Replies
8
Views
3K
Graduate Separating operators into classical + quantum
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad Radiation absorption by an atom
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Has the double slit experiment been conducted without a detector?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Question about a quantum field.
  • · Replies 24 ·
Replies
24
Views
4K
Graduate Photons violate Uncertainty Principle?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Formal integration of Heissenberg equation?
  • · Replies 2 ·
Replies
2
Views
1K
Graduate HUB & accurate single measurement
  • · Replies 6 ·
Replies
6
Views
1K
Undergrad Chaos Theory and Schrodinger's Cat: A Quirky Connection
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Lorentz action on creation/annihilation operators
  • · Replies 12 ·
Replies
12
Views
4K
Graduate Can bodies be made to radiate at one freq.
  • · Replies 6 ·
Replies
6
Views
2K
Graduate Ehrenfest theorem for kinetic energy
  • · Replies 6 ·
Replies
6
Views
3K
Graduate Joy Christian, Disproof of Bell's Theorem
  • · Replies 253 ·
9
Replies
253
Views
59K
Graduate Renormalized vertex always a log?
  • · Replies 3 ·
Replies
3
Views
1K
Graduate What is the condition for one-dimensional motion in an infinite potential well?
  • · Replies 13 ·
Replies
13
Views
3K
Graduate How does quantum mechanics define time
  • · Replies 5 ·
Replies
5
Views
3K
Graduate Understanding Spin in Composite Systems
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Can an electron absorb multiple photons at once?
  • · Replies 8 ·
Replies
8
Views
3K
Graduate What contributes to proton mass besides quark mass?
  • · Replies 12 ·
Replies
12
Views
2K
Graduate What Are Meta-Stable States in Atoms and Their Role in Lasing Action?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Probability Density and Current of Dirac Equation
  • · Replies 8 ·
Replies
8
Views
4K
Undergrad How does an EM wave affect an atom's energy levels?
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Can Aufbau and Hund's Rule explain electron filling after EC?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Is Pilot Wave Theory in Conflict with the Original Matter Wave Theory?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Feynman’s path integral and an electron in a Penning trap
  • · Replies 3 ·
Replies
3
Views
2K