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
Undergrad Double slit interactive detector
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad Calculating the number of energy states using momentum space
  • · Replies 153 ·
6
Replies
153
Views
16K
Undergrad Divergent vacuum uncertainty of fields in QFT, how to resolve?
  • · Replies 18 ·
Replies
18
Views
2K
Undergrad Confusion about the Concept of Operators
  • · Replies 14 ·
Replies
14
Views
3K
Undergrad Space is discrete or continuous?
  • · Replies 2 ·
Replies
2
Views
1K
High School Is Born's rule really verified?
  • · Replies 14 ·
Replies
14
Views
3K
Undergrad How to quantum mechanically describe the photon?
  • · Replies 14 ·
Replies
14
Views
2K
High School Are there unverifiable assertions about probabilities
  • · Replies 4 ·
Replies
4
Views
1K
Undergrad Does String Theory Justifiably Extend Gravitational Laws to Sub-Planck Lengths?
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Normalisation constant for identical particles
  • · Replies 1 ·
Replies
1
Views
2K
High School Why is L=2 not acceptable for carbon according to Hund's second rule?
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Does Quantum Mechanics Suggest a Conservation of Possibilities?
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad The Planck length and string theory
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Arrow of time and its reversal on a IBM quantum computer
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Relation between spectral radiance and density of cavity
  • · Replies 7 ·
Replies
7
Views
4K
Undergrad "Basic" question about Grover's Quantum Computing algorithm
  • · Replies 13 ·
Replies
13
Views
3K
Undergrad Will quantum computation lower energy requirements?
  • · Replies 4 ·
Replies
4
Views
7K
Undergrad Entanglement vs. Coherence in SPDC
  • · Replies 20 ·
Replies
20
Views
4K
High School Delayed choice quantum communication - "Berlin riddle"
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Maxwell Tensor Identity Explained: Deriving Formula 8.23 in Schawrtz's Book
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad Requesting help with the uncertainty principle equation
  • · Replies 15 ·
Replies
15
Views
2K
Undergrad Vacuum projection operator and normal ordering
  • · Replies 19 ·
Replies
19
Views
5K
Undergrad Solving Quantum Mechanics Integral Equation: How to Get from (1) to (2)?
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad General solution to the Time-independent Schrödinger equation?
  • · Replies 8 ·
Replies
8
Views
2K
Undergrad Against Collapse: A Mathematical Argument
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Has the 2-stage Stern-Gerlach experiment been performed?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Renormalization (Electron self energy)
  • · Replies 4 ·
Replies
4
Views
3K
Undergrad QFT - Confusion about Fermi's Golden Rule & Cross-Sections
  • · Replies 1 ·
Replies
1
Views
3K
Undergrad The (quantum) world existing AND non-existing
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad David Deutsch (1985) attempt to solve the incoherence problem
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad What Is the Empty Space in the Double Slit Experiment's Interference Pattern?
  • · Replies 7 ·
Replies
7
Views
2K
Undergrad Weak interaction between electrons
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Spin matrices and Field transformations
  • · Replies 3 ·
Replies
3
Views
4K
Undergrad Symmetries in quantum mechanics and the change of operators
  • · Replies 3 ·
Replies
3
Views
1K
Graduate Haag's Theorem and the Poincare Group
  • · Replies 29 ·
Replies
29
Views
3K
Undergrad Phonon Mass: Understanding its Sign and Effects on Gravity
  • · Replies 15 ·
Replies
15
Views
3K
High School Instant Quantum Communicator: Does Time Dilation Affect Voice?
  • · Replies 4 ·
Replies
4
Views
2K
Insights A Classical View of the Qubit - Comments
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Momentum of a stationary particle/wave?
  • · Replies 36 ·
2
Replies
36
Views
6K
Undergrad Can the quantum eraser work without coincidence?
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Averaging Initial & Endstates in Trace Formula
  • · Replies 2 ·
Replies
2
Views
1K
High School Does the brain use quantum mechanics?
  • · Replies 17 ·
Replies
17
Views
4K
Graduate Concepts in a quantum synchronization setup
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad How can one know the initial state from measurements?
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Multiverse vs Ugliverse vs Quantum Monism
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Photon Spin and Polarization filters
  • · Replies 5 ·
Replies
5
Views
4K
Undergrad Newtonian Gravity Vs. Quantum Gravity
  • · Replies 1 ·
Replies
1
Views
2K
High School Quantum entanglement mechanics
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Continuous variable entanglement
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Understanding Goldstone's Theorem Proof: Volume Limit and Commutator
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Difference between spin repulsion and electrostatic repulsion of an electron?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate The relationship between random fields and quantum fields
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Particle in a box and quantization of energy
  • · Replies 15 ·
Replies
15
Views
3K
Undergrad The Classical Limit of Maxwell-Boltzmann Distribution
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Ab Initio methods for chemical reactions?
  • · Replies 20 ·
Replies
20
Views
3K
Undergrad Is it possible to detect an electrostatic field?
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Does wave superposition consume time?
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Why can't an electron be spinning?
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Photoelectric Measurements & the Nature of Surfaces
  • · Replies 3 ·
Replies
3
Views
2K
High School Quantum field theory and the collapse of the wave function
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Franson interferometer: Entanglement?
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Frequency threshold in the photoelectric effect
  • · Replies 10 ·
Replies
10
Views
2K
Undergrad Superposition Analogy: Ceiling Fan Spin Beyond 15,000 RPM
  • · Replies 4 ·
Replies
4
Views
3K
Undergrad Parity operator and a free particle on a circle
  • · Replies 57 ·
2
Replies
57
Views
6K
Undergrad Microwave photons and microwave oven doors
  • · Replies 7 ·
Replies
7
Views
2K
Undergrad Symmetry transformation in Heisenberg vs Schrödinger Picture
  • · Replies 2 ·
Replies
2
Views
3K
High School Question about how the nabla interacts with wave functions
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Ballentine: Decoherence doesn't resolve the measurement problem
  • · Replies 69 ·
3
Replies
69
Views
9K
Undergrad Confusion about the quantum field Lorentz transformation
  • · Replies 3 ·
Replies
3
Views
3K
Undergrad If philosophical discussions are not allowed
  • · Replies 16 ·
Replies
16
Views
2K
Undergrad CSCO of Total Angular momentum
  • · Replies 1 ·
Replies
1
Views
1K
High School Entangled Photons: Adam Becker's QM Book "What is Real?
  • · Replies 10 ·
Replies
10
Views
2K
High School Does Entangled Particle Detection Prove the Spooky Action at a Distance?
  • · Replies 18 ·
Replies
18
Views
3K
High School Would there be an upper limit to density in QM?
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Is the visualization of quantum fields as harmonic oscillators accurate?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate How to explain the nuclear radius of Uranium 238 using QM
  • · Replies 2 ·
Replies
2
Views
4K
Undergrad What is Stochastic Quantum Mechanics (in simple terms)?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Schrödinger's cat: what's the state?
  • · Replies 17 ·
Replies
17
Views
3K
Undergrad Understanding the Role of k in the Wavefunction of Quantum Systems
  • · Replies 6 ·
Replies
6
Views
2K
High School Does the Universe Consist of Information Rather Than Stuff?
  • · Replies 4 ·
Replies
4
Views
1K
High School Thought experiment -- A radioactive decay detector and randomness
  • · Replies 19 ·
Replies
19
Views
2K
Graduate What is the Vector Manipulation Formula for Elastic Scattering Angle?
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Confusing eigensolutions of a wave function
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Measurement and the Conservation of Momentum
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad Uncertainty of momentum and position
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Definition of bi-local measurement by Masanes et al.
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Oscillator Model with Eigenfunctions
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Structure of Matter in Quantum Field Theory
  • · Replies 75 ·
3
Replies
75
Views
10K
High School Quantum entanglement comunication
  • · Replies 9 ·
Replies
9
Views
2K
Undergrad What is the basic scheme of quantum field theories?
  • · Replies 87 ·
3
Replies
87
Views
11K
Undergrad How Does Schwartz Derive the Schrödinger Equation from QFT?
  • · Replies 2 ·
Replies
2
Views
2K
High School Help with Bell states and measurements
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Question about noise in entanglement experiments
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad In NMR, Why does longitudinal magnetization decrease when....
  • · Replies 1 ·
Replies
1
Views
2K
Graduate How to numerically diagonalize a Hamiltonian in a subspace?
  • · Replies 4 ·
Replies
4
Views
4K
Undergrad Exploring the Lamb Shift: G-Factor & Angular Momentum
  • · Replies 1 ·
Replies
1
Views
2K
High School How are outer products quantum states?
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Quantum interpretations reduced to absurd, in a nutshell
  • · Replies 6 ·
Replies
6
Views
3K
Graduate What is best way to start learning DMRG for Fermions?
  • · Replies 2 ·
Replies
2
Views
3K
High School Quantum entanglement phenomenon
  • · Replies 2 ·
Replies
2
Views
2K