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 Valid local explanation of Bell violations? (Pegg et al., 1999; 2008)
Undergrad Why Does Molecular Potential Energy Curve Have That Specific Shape?
  • · Replies 26 ·
Replies
26
Views
2K
Undergrad How to recalculate Berry phase dipole moments (jumps over time)?
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Dirac equation in the hydrogen atom
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Observables on the "3 polarizers experiment"
  • · Replies 2 ·
Replies
2
Views
1K
High School Double Double Slit Experiment -- Question about Variations
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Connection between QFT renormalization and field regularization?
  • · Replies 28 ·
Replies
28
Views
2K
Undergrad Schrodinger Cat states in terms of Displacement Operator
  • · Replies 8 ·
Replies
8
Views
1K
Graduate Time evolution of coherent state with vacuum
  • · Replies 2 ·
Replies
2
Views
1K
High School Black Holes & Stars: Quantum Entanglement Possibility?
  • · Replies 5 ·
Replies
5
Views
2K
Graduate Trace of Numerator in QED vacuum polarization
  • · Replies 2 ·
Replies
2
Views
2K
Graduate What's the meaning of mean photon number?
  • · Replies 10 ·
Replies
10
Views
9K
Graduate Understanding how quantum annealing solves QUBO problems
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Discussion about quantum mechanics and spacetime
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad How Do We Model Wave Function Collapse After Measuring Particle Location?
  • · Replies 8 ·
Replies
8
Views
2K
Undergrad Common features of set theory and wave functions?
  • · Replies 4 ·
Replies
4
Views
1K
Undergrad Perturbation theory with two parameters?
  • · Replies 3 ·
Replies
3
Views
3K
Undergrad Commutation of Beam splitter operator with Displacement operator
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad What does it really mean that photons are quanta of light?
  • · Replies 15 ·
Replies
15
Views
2K
Graduate Infinities in QFT (and physics in general)
  • · Replies 113 ·
4
Replies
113
Views
10K
Graduate Cat state acting on given Hamiltonian
  • · Replies 1 ·
Replies
1
Views
884
Graduate Discover the Fascinating Evolution of Cat States in Our Comprehensive Guide
  • · Replies 1 ·
Replies
1
Views
1K
What is the legacy of Sidney Coleman?
  • · Replies 3 ·
Replies
3
Views
4K
Undergrad Observing a double-slit experiment
  • · Replies 14 ·
Replies
14
Views
2K
Undergrad How big is a photon - Interesting video
  • · Replies 13 ·
Replies
13
Views
4K
High School Why is there now evidence of a lag time in the photoelectric effect?
  • · Replies 10 ·
Replies
10
Views
2K
Undergrad Software for optical simulation with interference
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Spin spin coupling problem an electron/positron system
  • · Replies 1 ·
Replies
1
Views
970
Graduate Derivation of recovery channel for bit flip error
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Relationship between Larmor precession and energy eigenstates
  • · Replies 15 ·
Replies
15
Views
3K
Graduate How Does One Calculate the Time Evolution of a Photon in a Vacuum State?
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Question about the Propagator (as defined in Ballentine)
  • · Replies 15 ·
Replies
15
Views
1K
Graduate Understanding Local and Nonlocal Operators in Quantum Field Theory
  • · Replies 167 ·
6
Replies
167
Views
11K
Graduate I am looking for an example of a Fredholm module
  • · Replies 3 ·
Replies
3
Views
880
Undergrad Differentiated Sakharov Equation for Vacuum Fluctuations
  • · Replies 1 ·
Replies
1
Views
1K
High School Does Schrödinger's Cat Know Its Own Fate?
  • · Replies 17 ·
Replies
17
Views
2K
Undergrad Gauge Theory and Fiber Bundles
  • · Replies 11 ·
Replies
11
Views
3K
Undergrad Measuring Photon Intrinsic Nature: Is Interference a Factor?
  • · Replies 13 ·
Replies
13
Views
2K
Undergrad Proving the Schrodinger Equation
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Rayleigh scattering VS Raman scattering
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad Entangled particles in black hole decay?
  • · Replies 11 ·
Replies
11
Views
2K
Undergrad [Quantum Computing] Quantum Parallelism State Calculation
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Bootstrapping quantum Yang-Mills with concrete axioms
  • · Replies 2 ·
Replies
2
Views
970
Undergrad Output of down converted beam not proportional to input beam power?
  • · Replies 1 ·
Replies
1
Views
1K
High School Kim and Scully delayed eraser, interference curve form
  • · Replies 11 ·
Replies
11
Views
1K
Undergrad Orbitals and selection rules in a synchrotron
  • · Replies 18 ·
Replies
18
Views
2K
Undergrad Quantum vs Classical multiphoton interference on double slit
  • · Replies 17 ·
Replies
17
Views
2K
Graduate QM is Feynman path ensemble - is QFT Feynman field ensemble?
  • · Replies 89 ·
3
Replies
89
Views
5K
Undergrad Does decoherence mean the loss of entanglement?
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Is there a way to calculate the frequency of an electron wave?
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Jaynes-Cummings Density Operator Evolution
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Why are there no probability amplitudes in MWI?
  • · Replies 7 ·
Replies
7
Views
1K
Undergrad "Counterfactual definiteness" vs. "free will"
  • · Replies 102 ·
4
Replies
102
Views
6K
Graduate Spin-One Klein Gordon Equation
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad Understanding the 'vacuum fluctuations'
  • · Replies 1 ·
Replies
1
Views
1K
Graduate First findings from Fermilab's 'muon g-2' experiment revealed
  • · Replies 2 ·
Replies
2
Views
597
Undergrad Uncertainty principle##\Delta H\Delta Q##, where Q is time-independent
  • · Replies 1 ·
Replies
1
Views
853
Undergrad It seems that the eigenvalue problem rules out the possibility of E=0?
  • · Replies 5 ·
Replies
5
Views
1K
High School Entangled protons in a uniform magnetic field?
  • · Replies 20 ·
Replies
20
Views
1K
Bell's theorem: Local realism v. counterfactual determinism
  • · Replies 2 ·
Replies
2
Views
4K
Undergrad Is quantum mechanics imply nature is deterministic or probabilistic?
  • · Replies 8 ·
Replies
8
Views
3K
Undergrad Two Ways of Calculating the Solution to the Infinite Square Well?
  • · Replies 28 ·
Replies
28
Views
3K
Graduate Why are we allowed to use the trace cyclicity here?
  • · Replies 2 ·
Replies
2
Views
1K
Graduate Klein-Gordon Equation: Solving 2nd Order Time Derivative
  • · Replies 12 ·
Replies
12
Views
2K
Undergrad Einstein-Bohr "photon box" debate and general relativity
  • · Replies 20 ·
Replies
20
Views
3K
Undergrad Schrodinger Equation as Flow Equation
  • · Replies 2 ·
Replies
2
Views
1K
High School Which book is best for learning about quantum entanglement?
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Is the Wavefunction a Contravariant Component?
  • · Replies 47 ·
2
Replies
47
Views
3K
Graduate Quantum superposition: Is a problem of space-time worldview?
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad How Does Quantum Negativity Vary with Partial Transposes in Bipartite Systems?
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Why could magnetic monopoles exist?
  • · Replies 12 ·
Replies
12
Views
3K
Graduate Interaction between neutrons and nuclei during scattering
  • · Replies 1 ·
Replies
1
Views
1K
High School The average value of S operator
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Feynman diagram for bound particle output
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad "Black holes can only get bigger" - huh?
  • · Replies 61 ·
3
Replies
61
Views
4K
Undergrad SPDC & Entanglement: Downconvert for 3 Particle Entanglement?
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Interference Patterns & Photon Paths: Exploring the Double Slit Experiment
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad How can there be an Uncertain Momentum at a Specific Energy?
  • · Replies 13 ·
Replies
13
Views
2K
Undergrad A strange definition for Hermitian operator
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad Is this system a superposition?
  • · Replies 25 ·
Replies
25
Views
2K
Undergrad General solution of the hydrogen atom Schrödinger equation
  • · Replies 9 ·
Replies
9
Views
3K
Graduate Experiments probing the macroscopic limits of QM
  • · Replies 45 ·
2
Replies
45
Views
12K
High School Virtual Particles Momentum Transfer
  • · Replies 27 ·
Replies
27
Views
2K
High School Do entangled particles always react in an anti-symmetric way?
  • · Replies 6 ·
Replies
6
Views
1K
Graduate Heisenberg lens and probabilities
  • · Replies 9 ·
Replies
9
Views
2K
Graduate Is the freedom-of-choice loophole valid in quantum entanglement experiments?
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad What is the role of the D term in the Spin-1 XY model's Hamiltonian?
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Why is this 3D operator with degeneracies only giving me 2 eigenstates
  • · Replies 2 ·
Replies
2
Views
1K
High School Electron charge and spin creating a magnetic field?
  • · Replies 12 ·
Replies
12
Views
2K
Graduate State in the infinite potential well
  • · Replies 7 ·
Replies
7
Views
1K
Undergrad Complex conjugate and time reversal operator
  • · Replies 12 ·
Replies
12
Views
8K
Graduate Request for a review of a paper on consciousness creating reality.
  • · Replies 4 ·
Replies
4
Views
1K
Undergrad Improper density matrix with negative eigenvalues
  • · Replies 27 ·
Replies
27
Views
4K
Undergrad Double slit - properties of slit?
  • · Replies 45 ·
2
Replies
45
Views
4K
Undergrad [video] Simulating a delayed choice quantum eraser in an online drag-d
  • · Replies 0 ·
Replies
0
Views
1K
Graduate How to systematically find the symmetry operator given a Hamiltonian?
  • · Replies 1 ·
Replies
1
Views
798
Undergrad Dimensions of P and ##\omega##
  • · Replies 6 ·
Replies
6
Views
1K
Undergrad How to Show 25% of Cavity Radiant Energy Between 0 and Peak Wavelength?
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Large scale entanglement experiment
  • · Replies 5 ·
Replies
5
Views
1K
Undergrad Need help understanding entanglement
  • · Replies 8 ·
Replies
8
Views
1K
Graduate Bell inequalities demonstration
  • · Replies 1 ·
Replies
1
Views
1K