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 Universal quantum physics
High School Flashing In And Out of Existence?
  • · Replies 8 ·
Replies
8
Views
7K
High School What's the confidence level of quantum to macro behavior?
  • · Replies 8 ·
Replies
8
Views
2K
Undergrad The Debroglie Relation and SR?
  • · Replies 35 ·
2
Replies
35
Views
4K
Undergrad A bit confused about Schrödinger's cat
  • · Replies 97 ·
4
Replies
97
Views
8K
Graduate How to derive general solution to the Klein-Gordon equation
  • · Replies 27 ·
Replies
27
Views
10K
Undergrad The Heisenberg cut demystified
  • · Replies 9 ·
Replies
9
Views
3K
High School Has the existence of Hilbert Space been proven 100%?
  • · Replies 8 ·
Replies
8
Views
2K
Undergrad Understanding Spinor Rotations
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Tensor Product in QM: 1D vs 3D Hilbert Spaces
  • · Replies 3 ·
Replies
3
Views
1K
High School Bohr vs Einstein: is the Moon there when we are not looking?
  • · Replies 82 ·
3
Replies
82
Views
20K
Undergrad Weinberg LN in QM (Section 3.5): Momentum operator
  • · Replies 11 ·
Replies
11
Views
3K
High School Photon and half-silvered mirror
  • · Replies 17 ·
Replies
17
Views
5K
High School If all particles were different sizes, would the speed of light stay the same
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Why do we require locality in quantum field theory?
  • · Replies 31 ·
2
Replies
31
Views
5K
High School Looking for Wilhelm Wien's original paper
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Single qubit coherence time record
  • · Replies 1 ·
Replies
1
Views
1K
High School Photoelectric Effect under cutoff frequency
  • · Replies 2 ·
Replies
2
Views
3K
Undergrad Question regarding the Dirac delta function
  • · Replies 7 ·
Replies
7
Views
4K
Graduate Fun with Deltas and ##L^2##: Physicists vs Mathematicians
  • · Replies 58 ·
2
Replies
58
Views
4K
Graduate Why are low pressure gas discharge lamps thermal sources?
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Is Rest Mass a subjective quantity?
  • · Replies 3 ·
Replies
3
Views
2K
High School What's an electron doing between interactions?
  • · Replies 8 ·
Replies
8
Views
2K
High School Thought experiment violates Heisenberg? (of course not)
  • · Replies 6 ·
Replies
6
Views
2K
High School Uncovering the Truth: Non-Dualistic Particles Revealed
  • · Replies 11 ·
Replies
11
Views
2K
Undergrad What specific momentum should be used in the matter wave?
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Photon energies from Planck-Einstein: confirmed in practice?
  • · Replies 5 ·
Replies
5
Views
1K
Undergrad Understanding Bra-Ket Notation in Quantum Mechanics
  • · Replies 12 ·
Replies
12
Views
3K
Undergrad Direction of magnetic field measured by 2 coherent electrons
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Feynman Lecture Vol III Ch. 8 Question -- Heisenberg matrix picture
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Beta Radiation: Quark Transformation & Charge Change
  • · Replies 7 ·
Replies
7
Views
2K
Undergrad Is Ψ2Px an Eigenfunction of L2 or Lz in Quantum Mechanics?
  • · Replies 6 ·
Replies
6
Views
3K
Undergrad What Is the Tunnel Effect in Time-Independent Quantum Mechanics?
  • · Replies 3 ·
Replies
3
Views
1K
High School How does entanglement work for spin states?
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Why does the kinetic operator depend on a second derivative?
  • · Replies 5 ·
Replies
5
Views
3K
Undergrad Why is the KE operator negative in QM?
  • · Replies 10 ·
Replies
10
Views
4K
Undergrad If operators commute then eigenstates are shared
  • · Replies 14 ·
Replies
14
Views
5K
Undergrad Probability current in positive finite square potential
  • · Replies 17 ·
Replies
17
Views
3K
High School What is quantum equation of single photon?
  • · Replies 10 ·
Replies
10
Views
2K
Undergrad Photons on a CCD Vs. the magnetic or electric vector?
  • · Replies 4 ·
Replies
4
Views
1K
Undergrad Angular momentum ladder operator derivation
  • · Replies 10 ·
Replies
10
Views
5K
Undergrad How can I confirm Lz=ħ,0,-ħ using operators and eigenfunctions?
  • · Replies 4 ·
Replies
4
Views
1K
Undergrad Probability distribution plots
  • · Replies 7 ·
Replies
7
Views
2K
Undergrad How Does Superradiance Enhance Radiation Intensity?
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Is the wavefunction a physical quantity?
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Transition probability and superposition
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Demerits radial distribution functions
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad Heisenberg Uncertainty Principle & Wave Function
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Quantum Entanglement Harvesting
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad When can one clear the operator
  • · Replies 8 ·
Replies
8
Views
2K
Undergrad Rotational-Vibrational Energy state equation derivation
  • · Replies 4 ·
Replies
4
Views
1K
Undergrad Width of a stationary wave packet as a function of time
  • · Replies 7 ·
Replies
7
Views
2K
High School Mixed states V superposition V linear combinations?
  • · Replies 24 ·
Replies
24
Views
3K
Undergrad Square of absolute value of amplitude for a single photon
  • · Replies 12 ·
Replies
12
Views
2K
Graduate Integration of Schrodinger equation
  • · Replies 5 ·
Replies
5
Views
2K
Graduate Hamiltonian and constant potential
  • · Replies 14 ·
Replies
14
Views
5K
Undergrad Question about Quantum teleportation
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Quantum Spin Liquid: New State of Matter Explained
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Performing Bell State Measurement in Teleportation
  • · Replies 4 ·
Replies
4
Views
3K
Undergrad Density matrices, pure states and mixed states
  • · Replies 17 ·
Replies
17
Views
4K
Undergrad What is an electron's orbital angular momentum?
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad A question about reduced density matrices
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Technical question about modern Double Slit w/ one photon
  • · Replies 9 ·
Replies
9
Views
2K
Undergrad Bound electrons vs. free electrons
  • · Replies 9 ·
Replies
9
Views
8K
Graduate Is Poincare symmetry the real thing?
  • · Replies 31 ·
2
Replies
31
Views
4K
Undergrad Status of Adami's solution to Firewall paradox?
  • · Replies 4 ·
Replies
4
Views
2K
High School What causes reflection to occur in highly absorptive materials?
  • · Replies 4 ·
Replies
4
Views
1K
Undergrad The most general state function
  • · Replies 6 ·
Replies
6
Views
1K
Graduate Is Quantum Determinism Compatible with the Black Hole Information Paradox?
  • · Replies 12 ·
Replies
12
Views
2K
Undergrad "Light is wave-like and particle-like" --- Why this is wrong?
  • · Replies 10 ·
Replies
10
Views
2K
Undergrad Non-commuting operators on the same eigenfunctions
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Inverse square law and ensembles of photons
  • · Replies 25 ·
Replies
25
Views
4K
Graduate Resolution in single molecule localisation
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad Are photons from atomic cascade directly entangled?
  • · Replies 9 ·
Replies
9
Views
4K
Undergrad Hartree fock derivation problem
  • · Replies 3 ·
Replies
3
Views
2K
Graduate The Nonlinear Schrödinger Equation
  • · Replies 7 ·
Replies
7
Views
2K
High School Communication with no latency using quantum entanglement
  • · Replies 23 ·
Replies
23
Views
5K
Graduate Quantum versus classical computation of the density of state
  • · Replies 1 ·
Replies
1
Views
1K
High School Question: Can State Only Be Formulated Relating to Observable?
  • · Replies 8 ·
Replies
8
Views
1K
High School How Does Neutral Pion Decay Conform to Spin Conservation?
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Implication of eigenstates that are not normalizable
  • · Replies 7 ·
Replies
7
Views
4K
Undergrad Why is Planck radiation the most radiation a body can emit?
  • · Replies 3 ·
Replies
3
Views
1K
Graduate Peskin Shroeder quantum field 7.31 pag 221
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Unitary Time Evolution: Explaining Open Quantum Systems
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Fermis golden rule and transition rates
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Lorentz invariance of the Heaviside function
  • · Replies 1 ·
Replies
1
Views
3K
Undergrad Can Monte Carlo Wave Functions Capture Driven and Dissipative Quantum Dynamics?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Solution of the classical Klein-Gordon equation
  • · Replies 10 ·
Replies
10
Views
4K
Graduate Monte Carlo Wavefunction Methods
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Mathematics of tensor products in the Bell states
  • · Replies 4 ·
Replies
4
Views
4K
Undergrad Quantized Energy in micro scales
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad Electrons orbiting the nucleus: angular momentum
  • · Replies 42 ·
2
Replies
42
Views
7K
Graduate Where Can I Find the Published Paper on Bose-Einstein Statistics by Einstein?
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Canonical Commutation Relations in finite dimensional Hilbert Space?
  • · Replies 10 ·
Replies
10
Views
5K
Graduate How Do Quantum Dots Differ from Quantum Wells in Quantum Optical Properties?
  • · Replies 8 ·
Replies
8
Views
6K
High School Where Do Quantum Gravity and Cosomology Fit in Physics?
  • · Replies 19 ·
Replies
19
Views
3K
Graduate How Does the Presence of Gas Affect Decoherence in a Stern-Gerlach Experiment?
  • · Replies 10 ·
Replies
10
Views
2K
Undergrad Delayed Choice Quantum Eraser Question
  • · Replies 8 ·
Replies
8
Views
2K
Undergrad Laser diffraction through single slit
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Why is QM (almost) local, with one exception?
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Effective Dynamics of Open Quantum Systems: Stochastic vs Unitary Models
  • · Replies 212 ·
8
Replies
212
Views
27K