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

I Question about discussions around quantum interpretations
B Examples of less popular pairs of physical properties with uncertainty (HUP)
  • · Replies 12 ·
Replies
12
Views
2K
A Real vs complex spherical harmonics for hexagonal symmetry
  • · Replies 2 ·
Replies
2
Views
992
I Hossenfelder: Delayed Choice Quantum Eraser, Debunked?
  • · Replies 3 ·
Replies
3
Views
4K
I Can Operators Have Multiple Partial Derivatives in Quantum Mechanics?
  • · Replies 7 ·
Replies
7
Views
1K
I Fermi energy for a Fermion gas with a multiplicity function ##g_n##
  • · Replies 1 ·
Replies
1
Views
1K
I Physical meaning of two independent, non-interacting parts
  • · Replies 3 ·
Replies
3
Views
1K
I What do you need to establish that spin is conserved?
  • · Replies 3 ·
Replies
3
Views
1K
A Relativistically invariant 2-body phase space integral
  • · Replies 3 ·
Replies
3
Views
2K
I Spin operator and spin quantum number give different values, why?
  • · Replies 12 ·
Replies
12
Views
3K
A What is the biggest problem to be solved in Quantum Physics in 2023?
  • · Replies 48 ·
2
Replies
48
Views
5K
B Bell inequality test without polarisation?
  • · Replies 8 ·
Replies
8
Views
2K
I Questions about Grover's algorithm for quantum searches
  • · Replies 6 ·
Replies
6
Views
1K
A What is a spatial wavefunction in QFT?
  • · Replies 4 ·
Replies
4
Views
2K
I Average magnetic moment of atom in magnetic field ##B##
  • · Replies 1 ·
Replies
1
Views
1K
I Quantum decoherence and the emergence of space/time and gravity
  • · Replies 17 ·
Replies
17
Views
2K
A A question about entanglement swapping
  • · Replies 4 ·
Replies
4
Views
2K
I Is the Archimedes Experiment a groundbreaking test of the Casimir Effect?
  • · Replies 10 ·
Replies
10
Views
3K
I Quantum Mechanics as a Probabilistic forecast of reality
  • · Replies 21 ·
Replies
21
Views
2K
I Generation of polarization-squeezed beams
  • · Replies 2 ·
Replies
2
Views
1K
A Do Time-ordering and Time Integrals commute? Peskin(4.22)(4.31)(4.44)
  • · Replies 3 ·
Replies
3
Views
2K
I Hidden phase in polarization tests of Bell's inequality?
  • · Replies 49 ·
2
Replies
49
Views
5K
I Are Nicolas Gisin's Intuitionist Mathematics Theories Compatible with SR and GR?
  • · Replies 7 ·
Replies
7
Views
2K
I Biphoton: Existence of layered or multiple entanglements
  • · Replies 5 ·
Replies
5
Views
1K
I Understanding Scattered Radiation in Photon Beams
  • · Replies 8 ·
Replies
8
Views
2K
I Understanding the Equations of Motion for the Dirac Lagrangian
  • · Replies 1 ·
Replies
1
Views
2K
I Showing that operators follow SU(2) algebra
  • · Replies 2 ·
Replies
2
Views
1K
I Mass of Electron & Flipping Frequency: Leonard Susskind Explains
  • · Replies 1 ·
Replies
1
Views
1K
I The Potential of Back-to-Back Photons: an Experiment
  • · Replies 4 ·
Replies
4
Views
1K
I Noise Proportional to Square Root of Illumination: Need Formula Help
  • · Replies 0 ·
Replies
0
Views
931
I Do black holes destroy quantum states?
  • · Replies 4 ·
Replies
4
Views
2K
A How can gauge fields be associated with real particles?
  • · Replies 13 ·
Replies
13
Views
2K
I Quantum Entanglement and Parallel Worlds/Existence
  • · Replies 7 ·
Replies
7
Views
2K
I Principles of Quantum Mechanics - Hans C. Ohanian - 0137127952
  • · Replies 3 ·
Replies
3
Views
2K
A Bound states of an electron trapped in a dipole field
  • · Replies 1 ·
Replies
1
Views
1K
B Entanglement inside a black hole
  • · Replies 14 ·
Replies
14
Views
2K
I ##Tr([Q,P])## and Ballentine Problem 6.3
  • · Replies 31 ·
2
Replies
31
Views
2K
B Are Photons Real? New Study Challenges Assumptions
  • · Replies 17 ·
Replies
17
Views
2K
B What exactly is spin? Does the standard model work without spin?
  • · Replies 27 ·
Replies
27
Views
3K
B Quantum Computers and their special properties?
  • · Replies 4 ·
Replies
4
Views
1K
A Why Unitary Evolution? QM Justification Ideas
  • · Replies 63 ·
3
Replies
63
Views
8K
A Main Theorem of Renormalization, but in physicist-speak
  • · Replies 10 ·
Replies
10
Views
2K
I Uncovering the Mystery of Kallen-Lehmann Spectral Representation
  • · Replies 15 ·
Replies
15
Views
3K
I Dirac Notation for Operators: Ambiguity in Expectation Values?
  • · Replies 5 ·
Replies
5
Views
2K
B The Mystery of Excited Electrons: Are They Moving Away from the Nucleus?
  • · Replies 2 ·
Replies
2
Views
1K
I Ways of measuring open quantum systems
  • · Replies 1 ·
Replies
1
Views
2K
A Can entanglement be detected in a single Bell pair?
  • · Replies 1 ·
Replies
1
Views
2K
I Necessity of the field viewpoint
  • · Replies 5 ·
Replies
5
Views
1K
I Noether currents for a complex scalar field and a Fermion field
  • · Replies 3 ·
Replies
3
Views
2K
I How to add time variation to a Schrodinger operator?
  • · Replies 11 ·
Replies
11
Views
2K
I Propagator of massless Weyl field
  • · Replies 10 ·
Replies
10
Views
2K
A How to measure the two-photon detuning in 3-level system?
  • · Replies 2 ·
Replies
2
Views
1K
I Translating the harmonic oscillator
  • · Replies 2 ·
Replies
2
Views
2K
B Quantum Entanglement & Hybridization
  • · Replies 7 ·
Replies
7
Views
2K
I Finding Eigenvectors of 2-state system
  • · Replies 7 ·
Replies
7
Views
1K
A Numerical method to Lippman-Schwinger equation
  • · Replies 1 ·
Replies
1
Views
1K
B Atom energy band formation and electron allotment
  • · Replies 5 ·
Replies
5
Views
1K
I Rewriting of Gibbs Free Energy in Peksin (Equations 13.35/13.36)
  • · Replies 12 ·
Replies
12
Views
1K
I Classic 'Double-Slit' Experiment Using Time Instead of Space
  • · Replies 3 ·
Replies
3
Views
2K
B Quantum entanglement and simultaneity
  • · Replies 4 ·
Replies
4
Views
3K
B Is it possible to measure both position and momentum simultaneously?
  • · Replies 13 ·
Replies
13
Views
2K
I Does a particle's mass fluctuate.
  • · Replies 10 ·
Replies
10
Views
1K
I Symmetry and two electron wave function
  • · Replies 7 ·
Replies
7
Views
2K
A Wave-packet in configuration space
  • · Replies 1 ·
Replies
1
Views
1K
A What’s the meaning of decay rate in optical Bloch equations?
  • · Replies 1 ·
Replies
1
Views
1K
A Relation between the density matrix and the annihilation operator
  • · Replies 0 ·
Replies
0
Views
1K
I Fourier Transform of Photon Emission Hamiltonian
  • · Replies 4 ·
Replies
4
Views
2K
I Identity involving exponential of operators
  • · Replies 2 ·
Replies
2
Views
1K
I Superposition of different spins
  • · Replies 15 ·
Replies
15
Views
3K
I Why is there an additional prefactor in equation (12.52) of Peskin's QFT book?
  • · Replies 0 ·
Replies
0
Views
1K
I Where is the mass of a particle located?
  • · Replies 21 ·
Replies
21
Views
2K
I Weakly interacting electrons in an atom
  • · Replies 2 ·
Replies
2
Views
2K
I Black Hole Information path described in new article
  • · Replies 0 ·
Replies
0
Views
1K
I Non-Commutation Property and its Relation to the Real World
  • · Replies 19 ·
Replies
19
Views
2K
B Quantum entanglement and hidden variables
  • · Replies 7 ·
Replies
7
Views
3K
B What do these wavenumbers correspond to in Raman spectroscopy?
  • · Replies 5 ·
Replies
5
Views
2K
I Ballentine Equation 5.13 on conservation of momentum
  • · Replies 3 ·
Replies
3
Views
1K
A Von Neumann's uniqueness theorem (CCR representations)
  • · Replies 9 ·
Replies
9
Views
1K
I Does an electron have a quantum phase frequency?
  • · Replies 36 ·
2
Replies
36
Views
5K
I Prefactor in Canonical Quantization of Scalar Field
  • · Replies 4 ·
Replies
4
Views
1K
I Momentum eigenfunctions in an infinite well
  • · Replies 31 ·
2
Replies
31
Views
4K
B Does anything happen in the quantum world?
  • · Replies 12 ·
Replies
12
Views
1K
A Quantum analog of Boltzmann entropy?
  • · Replies 43 ·
2
Replies
43
Views
5K
B How to show that particle spin includes angular momentum?
  • · Replies 14 ·
Replies
14
Views
2K
A Momentum operator -- Why do we use the plane wave solution?
  • · Replies 8 ·
Replies
8
Views
1K
I QED Renormalization Counterterm Confusion
  • · Replies 6 ·
Replies
6
Views
2K
B What are the energy eigenvalues of a harmonic oscillator?
  • · Replies 2 ·
Replies
2
Views
1K
I Interaction of EM radiation with Glass
  • · Replies 14 ·
Replies
14
Views
2K
I Mach-Zehnder interferometer, but with an entangled beam?
  • · Replies 33 ·
2
Replies
33
Views
3K
I What is the relation between the Dirac equation and QED?
  • · Replies 7 ·
Replies
7
Views
2K
I What happens when circular polarization meets a diagonal polarizer?
  • · Replies 20 ·
Replies
20
Views
3K
I Repeated measurements on a quantum system interacting with other quantum systems
  • · Replies 3 ·
Replies
3
Views
2K
A How to derive Quantum Mechanics in curved physical space?
  • · Replies 6 ·
Replies
6
Views
2K
B Is a Spin 2 Particle the Key to Understanding Gravitation in Quantum Mechanics?
  • · Replies 26 ·
Replies
26
Views
3K
A Multiparticle Relativistic Quantum Mechanics in an external potential
  • · Replies 22 ·
Replies
22
Views
3K
I Can Quantum Effects Prevent Reaching Absolute Zero?
  • · Replies 3 ·
Replies
3
Views
1K
I Measurement of a superposition and Born's rule
  • · Replies 22 ·
Replies
22
Views
2K
I What is the true nature of microscopic particles when not interacting?
  • · Replies 4 ·
Replies
4
Views
2K
A Symmetries of particle interacting with external fields (Ballentine)
  • · Replies 5 ·
Replies
5
Views
1K
A Ballentine on construction of the (Galilean) symmetry generators
  • · Replies 17 ·
Replies
17
Views
2K
I Dot product of two vector operators in unusual coordinates
  • · Replies 14 ·
Replies
14
Views
2K