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
Undergrad Do Atoms Literally Behave as Waves?
  • · Replies 32 ·
2
Replies
32
Views
10K
Graduate What is residual Coulomb interaction and why does it exist?
  • · Replies 1 ·
Replies
1
Views
4K
Graduate Can a computer be an observer?
  • · Replies 71 ·
3
Replies
71
Views
11K
Graduate How do we measure particle momentum?
  • · Replies 7 ·
Replies
7
Views
11K
Graduate In a quantum fluid, we know that it is difficult to add or destroy a
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Help with Understanding CH27 of Srednicki
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Dual Light Sources in Dual-Slit Experiment?
  • · Replies 2 ·
Replies
2
Views
8K
Graduate Visualization of entanglement when relative speeds differ greatly
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Does Electric Charge Have a Definite Value or Does Uncertainty Apply?
  • · Replies 10 ·
Replies
10
Views
7K
Undergrad Basic conceptual/intuitive question on molecular vibrations and rotations.
  • · Replies 1 ·
Replies
1
Views
2K
Graduate What is the Scale Dependence of Coupling Constants in QFT?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate OMG another Virtual Particle question. Runnnn
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad How Much Radiation is Harmful?
  • · Replies 1 ·
Replies
1
Views
3K
Graduate What is the origin of the strong red line in the sodium emission spectrum?
  • · Replies 31 ·
2
Replies
31
Views
26K
Graduate Normalization of wave function .
  • · Replies 1 ·
Replies
1
Views
2K
Graduate What would happen if the uncertainty principle was false?
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Photons from separated sources can be entangled - after they were detected
  • · Replies 144 ·
5
Replies
144
Views
21K
Graduate Is the Wave Function Real? Evidence from the Frankenstein Photon Experiment
  • · Replies 78 ·
3
Replies
78
Views
12K
Graduate Eigenvalue of momentum for particle in a box
  • · Replies 12 ·
Replies
12
Views
13K
Graduate Two-slit experiment and The Truth
  • · Replies 35 ·
2
Replies
35
Views
9K
Graduate Can Quantum Waves Really Have Mass?
  • · Replies 32 ·
2
Replies
32
Views
5K
Graduate How is Compton scattering calculated without using quantum field theory?
  • · Replies 1 ·
Replies
1
Views
2K
High School Photon Reflection & Randomness - Is it Correct?
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Why does neutral fluorine so reactive?
  • · Replies 8 ·
Replies
8
Views
4K
Graduate Photoelectric effect, discrete values of the tangent
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Srednicki CH26 Explained: Solving Eqn 26.7
  • · Replies 5 ·
Replies
5
Views
2K
Graduate Understanding Degenerate States: Rules & Equations
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Momentum in an Infinite Square Well
  • · Replies 7 ·
Replies
7
Views
7K
Graduate Do black holes agree with the pauli exclusion?
  • · Replies 13 ·
Replies
13
Views
3K
Graduate Quantum Entanglement (A source saying QE exceeds the Speed of Light)
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Particle Spin, Isospin, weak Isospin
  • · Replies 2 ·
Replies
2
Views
8K
Graduate An Idea I've been Thinking of
  • · Replies 7 ·
Replies
7
Views
2K
Graduate Consequences of Hardy's paradox and joint weak measurement
  • · Replies 17 ·
Replies
17
Views
8K
Graduate Dirac equation in curvilinear coordinates
  • · Replies 1 ·
Replies
1
Views
2K
Graduate The action principle in quantum theory
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Fermi's Golden Rule (Decay Amplitude)
  • · Replies 1 ·
Replies
1
Views
5K
Graduate Young experiment in gravity field
  • · Replies 4 ·
Replies
4
Views
3K
Graduate How Does Photon Entanglement Influence Light Reflection on Curved Surfaces?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Measuring Spin of Qubit: Analyzing Algebraic States
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Uncertainty Principle in Wilson Cloud Chamber Measurements
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Is There a Classical Analogue of Spin Angular Momentum in Dirac Fields?
  • · Replies 17 ·
Replies
17
Views
8K
Graduate References or aids in learning QM?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate About mixed state and pure state
  • · Replies 6 ·
Replies
6
Views
14K
Graduate Wavefunction collapse and measurement
  • · Replies 2 ·
Replies
2
Views
3K
Graduate Resources for information on Entropy
  • · Replies 2 ·
Replies
2
Views
2K
Graduate What is the wavefunction of the localized particle?
  • · Replies 10 ·
Replies
10
Views
7K
Undergrad Anti-Bonding/Bonding Molecular Orbitals
  • · Replies 8 ·
Replies
8
Views
14K
Graduate Proof of trace of density matrix in pure/mixed states
  • · Replies 11 ·
Replies
11
Views
17K
Graduate Eigenvalues of a reduced density matrix
  • · Replies 3 ·
Replies
3
Views
4K
Graduate Interfering Photons: How Paul Dirac Explained the Double Slit Experiment
  • · Replies 5 ·
Replies
5
Views
3K
Graduate Bell's Inequalities and Double Dependencies on Hidden Variables
  • · Replies 8 ·
Replies
8
Views
3K
Graduate What Makes Quantum Entanglement So Intriguing?
  • · Replies 4 ·
Replies
4
Views
3K
Graduate Radiation by accelerating charge
  • · Replies 11 ·
Replies
11
Views
5K
Graduate Calculating Spinning Probabilities in Richard Feynman's QCD
  • · Replies 2 ·
Replies
2
Views
3K
Undergrad Compton Scattering: What is the Difference from Electron-Photon Absorption?
  • · Replies 4 ·
Replies
4
Views
3K
Graduate Recovering lagrangian from equations of motion
  • · Replies 4 ·
Replies
4
Views
7K
Graduate Understanding the speed of light
  • · Replies 17 ·
Replies
17
Views
4K
Graduate Squaring the delta function in QFT(Srendicki ch11)
  • · Replies 7 ·
Replies
7
Views
7K
Graduate Why Does Weinberg Extend Energy Integration to Negative Infinity?
  • · Replies 17 ·
Replies
17
Views
5K
Graduate Can two photon emerage into one?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Associativity problem with observables
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Interaction in QED: Electron/Proton Attraction & Repulsion
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Quantum optics, 2 qubit gates acting on 2 qubits - cannot be factorized?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Zee QFT In a Nutshell Propagator Question
  • · Replies 7 ·
Replies
7
Views
6K
Graduate Understanding Spin & Angular Momentum
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Question about Pauli exclusion principle
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Heisenberg uncertainty principle
  • · Replies 22 ·
Replies
22
Views
6K
Graduate Planck black body formula question
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Slit diffraction: time between emission and detection of photon
  • · Replies 1 ·
Replies
1
Views
2K
Graduate What Causes 2n^2 Vacancies in Atomic Orbitals?
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Do photons travel in straight lines?
  • · Replies 4 ·
Replies
4
Views
4K
Graduate Calculating Effective Mass of InGaAs Alloy
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Is There a Smallest Time Interval in the Quantum World?
  • · Replies 6 ·
Replies
6
Views
3K
Undergrad Atom & Universe: Similarities & Dissimilarities
  • · Replies 9 ·
Replies
9
Views
3K
Graduate Von Neumann entropy in terms of the tangle
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Interpreting the probability distribution of the potential step
  • · Replies 7 ·
Replies
7
Views
4K
Graduate Relativistic Uncertainty Principle
  • · Replies 5 ·
Replies
5
Views
5K
Undergrad Is the Momentum of a Photon Conserved in Matter?
  • · Replies 7 ·
Replies
7
Views
9K
Undergrad Spin Explained for the "Wikipedia Physicist" - No QM Needed!
  • · Replies 96 ·
4
Replies
96
Views
16K
Graduate Why Do These Quantum Mechanical Selection Rules Result in Zero?
  • · Replies 18 ·
Replies
18
Views
4K
Graduate PF is a resource for questions about Peskin & Schroeder
  • · Replies 1 ·
Replies
1
Views
16K
Graduate Visualizing Electrons as Probability Densities
  • · Replies 10 ·
Replies
10
Views
5K
Graduate Quantum / gauge field -> Classical limit
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Relativistic Mechanics of Hydrogen Like S Orbials at high Z
  • · Replies 4 ·
Replies
4
Views
2K
Graduate I'm just wondering, what causes the existence of quantum levels?
  • · Replies 39 ·
2
Replies
39
Views
6K
Graduate Dirac equation & Dirac matrices
  • · Replies 1 ·
Replies
1
Views
4K
Graduate Is Geometric Quantum Mechanics a Viable Alternative to Hilbert Space?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Information erasure without an energy cost
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Feynman Diagrams for Exam Prep: Position vs. Momentum Space
  • · Replies 5 ·
Replies
5
Views
4K
Graduate How Does Photon Spin Relate to Frequency and Polarization?
  • · Replies 5 ·
Replies
5
Views
4K
Graduate How does a photon carry force?
  • · Replies 60 ·
3
Replies
60
Views
17K
Graduate Schrodinger Equation: Kinetic Energy Impact?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Calc Poisson Bracket: {π,∂φ} Calculation
  • · Replies 14 ·
Replies
14
Views
4K
Graduate Question about upper energy limits.
  • · Replies 12 ·
Replies
12
Views
3K
Graduate Fermions with no mass, and helicity coupling.
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Are quarks really in isocoles triangle positions?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Can Energy and Interactions Create Electrons?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate How Does the Heisenberg Uncertainty Principle Challenge Classical Physics?
  • · Replies 26 ·
Replies
26
Views
5K
Graduate New look at Youngs experiment
  • · Replies 8 ·
Replies
8
Views
3K
Graduate Where Does Charge Originate in Antimatter and Elementary Particles?
  • · Replies 13 ·
Replies
13
Views
7K