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.

Sub-forums

Quantum Interpretations and Foundations

Particle vs Wave Interpretations of QM
1.3K threads
Undergrad Particle vs Wave Interpretations of QM
High School Is All Motion Discrete or Continuous in QM?
  • erobz
  • · Replies 19 ·
Replies
19
Graduate Is there a generalized second law of thermodynamics?
  • Heidi
  • · Replies 15 ·
Replies
15
Undergrad Dimensions of quantum cell automata's state space
  • Jaime_mc2
  • · Replies 1 ·
Replies
1
Graduate What is the cause of the Mexican hat potential of the Higgs field?
  • JandeWandelaar
  • · Replies 30 ·
2
Replies
30
Graduate Relationship between Wilson's RG and the Callan-Symanzik Equation
  • gsschandu
  • · Replies 2 ·
Replies
2
Graduate Does the existence of a POVM require an ancilla?
  • jbergman
  • · Replies 2 ·
Replies
2
Graduate Measurement of the phase of coherent states
  • Jamister
  • · Replies 9 ·
Replies
9
Undergrad Time of flight measurement uncertainty
  • Malamala
  • · Replies 3 ·
Replies
3
High School How does the EPR paradox work?
  • EduardoToledo
  • · Replies 4 ·
Replies
4
Graduate What is the role of Slater determinants in quantum chemical methods?
  • Greg Bernhardt
  • · Replies 1 ·
Replies
1
Graduate Quantum Hall Effect Basics: Topological Insulator & Semi-Metal
  • chow_dhury
  • · Replies 2 ·
Replies
2
High School Double slit experiment combined with Stern-Gerlach
  • Nocturnial
  • · Replies 1 ·
Replies
1
High School Wave/Particle Duality: Helical Paths & Planar Projections
  • Bach33
  • · Replies 24 ·
Replies
24
Graduate Has a calculation of the vacuum energy density been done with strings?
  • JandeWandelaar
  • · Replies 11 ·
Replies
11
High School How does a spinor affect a wave function?
  • justpeeking
  • · Replies 3 ·
Replies
3
High School Spacetime, quantum field, and aether
  • Mohd Abdullah
  • · Replies 9 ·
Replies
9
Graduate Off-Forward quark-quark amplitude in momentum space
  • Diracobama2181
  • · Replies 1 ·
Replies
1
Undergrad Brownian motion and continuity
  • DesertFox
  • · Replies 23 ·
Replies
23
Undergrad What were the real results of the photoelectric effect experiment?
  • pkc111
  • · Replies 5 ·
Replies
5
Graduate Expectation value in Heisenberg picture: creation and annihilation
  • Bruno Cardin
  • · Replies 1 ·
Replies
1
High School Question about quantum superposition
  • evelk86
  • · Replies 2 ·
Replies
2
Undergrad The quantum state of the Universe
  • accdd
  • · Replies 6 ·
Replies
6
Undergrad The general structure of relativistic QFTs
  • vanhees71
  • · Replies 87 ·
3
Replies
87
Undergrad Solving a Particle on the Surface of a Sphere: Obtaining Eigenvalues
  • Salmone
  • · Replies 4 ·
Replies
4
Undergrad Can the Helium atom be solved by other methods?
  • physwiz222
  • · Replies 6 ·
Replies
6
Undergrad Electron Indistinguishability and Repulsion
  • Dario56
  • · Replies 44 ·
2
Replies
44
High School Wave-particle duality of atoms and molecules
  • DesertFox
  • · Replies 38 ·
2
Replies
38
Undergrad Strange Hamiltonian of two particles on the surface of a sphere
  • Salmone
  • · Replies 1 ·
Replies
1
Undergrad Wavefunction of ionized hydrogen electron
  • Physicsman88
  • · Replies 9 ·
Replies
9
Undergrad Do Bell Experiments Show Local Overlap of Wave Functions Before Measurement?
  • msumm21
  • · Replies 72 ·
3
Replies
72
Undergrad Expansion of Space: Questions on How the Universe Works
  • Martyn Arthur
  • · Replies 1 ·
Replies
1
Undergrad Boltzmann brains and limitless energy....
  • JuneSpring25
  • · Replies 15 ·
Replies
15
Undergrad Acceleration in QFT: Fundamentals, Causes, Quantization
  • accdd
  • · Replies 10 ·
Replies
10
Graduate The Generalized Capabilities of the Standard Model Lagrangian?
  • JohnH
  • · Replies 6 ·
Replies
6
High School Copenhagen Interpretation - Superposition - confirmed?
  • Jacob Peters
  • · Replies 27 ·
Replies
27
Undergrad Wavefunction properties tunneling effect
  • Salmone
  • · Replies 4 ·
Replies
4
Undergrad Geiger counters and measurement
  • jeeves
  • · Replies 99 ·
4
Replies
99
Undergrad Logical implication vs physical causality
  • entropy1
  • · Replies 8 ·
Replies
8
Undergrad Derive the probability of spin at arbitrary angle is cos( )
  • Sparky_
  • · Replies 6 ·
Replies
6
Graduate Secular Approximation of Dipole-Dipole Hamiltonian
  • TeamMate
  • · Replies 2 ·
Replies
2
Undergrad Separability of a Hamiltonian with spin
  • Salmone
  • · Replies 1 ·
Replies
1
Graduate S-Matrix in Quantum Field Theory
  • gremory
  • · Replies 2 ·
Replies
2
Undergrad Why does doping make resonating valence bonds (singlet pairs) mobile?
  • Faizan Samad
  • · Replies 2 ·
Replies
2
Undergrad How Do You Break Quantum Entanglement Bonds?
  • VictorMedvil
  • · Replies 7 ·
Replies
7
Undergrad Is there spin-charge separation in 2d?
  • Faizan Samad
  • · Replies 1 ·
Replies
1
Undergrad Linear combination of states with Pauli's principle
  • Salmone
  • · Replies 9 ·
Replies
9
Undergrad Question about Feynman’s path integrals
  • Sophrosyne
  • · Replies 1 ·
Replies
1
Undergrad Separable Hamiltonian for central potential
  • Salmone
  • · Replies 21 ·
Replies
21
Graduate Power series in quantum mechanics
  • gremory
  • · Replies 1 ·
Replies
1
High School Derivative of a particle’s energy
  • Guineafowl
  • · Replies 18 ·
Replies
18
High School Statistical Independence in Quantum Mechanics
  • Lynch101
  • · Replies 22 ·
Replies
22
Undergrad Understanding the diagonal elements of the transition dipole moment
  • approx12
  • · Replies 1 ·
Replies
1
High School Is Quantum Field Theory Understandable Without Advanced Mathematics?
  • Tommy White
  • · Replies 17 ·
Replies
17
Graduate 1D Quantum Well - Different width "naming" gives different result ?
  • Solmyros
  • · Replies 2 ·
Replies
2
Undergrad What is the Role of the Radial Position Operator in Quantum Mechanics?
  • Kashmir
  • · Replies 21 ·
Replies
21
Undergrad Schrodinger Equation from Ritz Variational Method
  • Samama Fahim
  • · Replies 1 ·
Replies
1
Graduate Computing Correlation functions
  • gremory
  • · Replies 1 ·
Replies
1
Undergrad Understanding Landau Levels for 3D Fermionic Gas in Magnetic Field
  • Sunny Singh
  • · Replies 4 ·
Replies
4
High School Low magnification, high resolution, experiments on photon sieves?
  • ThiagoMNobrega
  • · Replies 1 ·
Replies
1
High School Wave function won't collapse under a microscope?
  • ThiagoMNobrega
  • · Replies 17 ·
Replies
17
Undergrad Spin, Angular Momentum, Momentum, Energy & NRQM
  • accdd
  • · Replies 1 ·
Replies
1
Undergrad Role of Fine Structure Constant in Q.E.D.?
  • LarryS
  • · Replies 8 ·
Replies
8
Undergrad Blender Particle Photon Simulation (interesting results w soft bodies)
  • ThiagoMNobrega
  • · Replies 6 ·
Replies
6
Undergrad Why don't we consider ##E_{com}## while solving a two body problem?
  • Kashmir
  • · Replies 2 ·
Replies
2
Graduate Homodyne detection quantum state tomography
  • Jamister
  • · Replies 1 ·
Replies
1
Graduate POVMs for Infinite Dimensional Hilbert Spaces
  • jbergman
  • · Replies 6 ·
Replies
6
Undergrad Doubt in understanding degenerate perturbation theory
  • Kashmir
  • · Replies 10 ·
Replies
10
Undergrad Simulating physics: the current status of lattice field theories
  • ErikZorkin
  • · Replies 2 ·
Replies
2
Undergrad Finding ##S_x## eigenstate using experiments
  • Kashmir
  • · Replies 4 ·
Replies
4
Undergrad Conventional description of the matter wave
  • George444fg
  • · Replies 1 ·
Replies
1
Graduate Molar heat capacity of CO2 is too high. Why?
  • Philip Koeck
  • · Replies 1 ·
Replies
1
Graduate What is meant by pruning and enrichment?
  • user366312
  • · Replies 1 ·
Replies
1
Undergrad Particle on a cylinder with harmonic oscillator along z-axis
  • Salmone
  • · Replies 2 ·
Replies
2
Undergrad Why Can We Use This Mathematical Formula for Mean Value of Measurement?
  • ofirg55
  • · Replies 6 ·
Replies
6
High School Is gravitized quanta the solution rather than quantum gravity?
  • bbbl67
  • · Replies 3 ·
Replies
3
Undergrad Can you tell the difference between two neutrons in an alpha particle?
  • wasong
  • · Replies 5 ·
Replies
5
Graduate Position basis in Quantum Mechanics
  • pabloweigandt
  • · Replies 8 ·
Replies
8
High School Are zero-point energy and inertia incompatible?
  • jaketodd
  • · Replies 4 ·
Replies
4
Undergrad Can someone explain why momentum does not commute with potential?
  • coolpoke0908
  • · Replies 2 ·
Replies
2
Undergrad Deriving the Commutator of Exchange Operator and Hamiltonian
  • Samama Fahim
  • · Replies 1 ·
Replies
1
Undergrad Modern Atom Model: Is It Perpetual Motion?
  • dom_quixote
  • · Replies 5 ·
Replies
5
High School What happens when 2 beams of light interact?
  • rgtr
  • · Replies 4 ·
Replies
4
Undergrad Hamiltonian of a particle moving on the surface of a sphere
  • Salmone
  • · Replies 2 ·
Replies
2
Undergrad Matrix element in problem with hydrogen atom
  • Salmone
  • · Replies 2 ·
Replies
2
Graduate Grassmann number: a more rigorous treatment?
  • taishizhiqiu
  • · Replies 11 ·
Replies
11
Graduate Another thought experiment about spin 1/2
  • Christian Thom
  • · Replies 15 ·
Replies
15
Undergrad How to find the wavefunction in this case?
  • Kashmir
  • · Replies 6 ·
Replies
6
Undergrad More doubts in perturbation theory
  • Kashmir
  • · Replies 8 ·
Replies
8
Undergrad Classical analogy approach to quantum mechanics
  • mohamed_a
  • · Replies 21 ·
Replies
21
Undergrad Is it a fact that vacuum energy exists?
  • Suekdccia
  • · Replies 33 ·
2
Replies
33
Undergrad Particle on a sphere problem in quantum mechanics and its solution
  • Kashmir
  • · Replies 7 ·
Replies
7
Graduate Meaning of "symbol" in algebraic field theory?
  • strangerep
  • · Replies 5 ·
Replies
5
Undergrad Classical field in quantum field theory?
  • Tan Tixuan
  • · Replies 4 ·
Replies
4
Undergrad Uncertainty in an experiment with an image viewed through a big slit
  • dom_quixote
  • · Replies 3 ·
Replies
3
Graduate Could Altering the Past Be Possible with Time Travel?
  • kb23455
  • · Replies 1 ·
Replies
1
Undergrad Wavefunction in polar coordinates and its bra ket notation
  • Kashmir
  • · Replies 14 ·
Replies
14
Undergrad Operator acting on ket state n
  • Jean-Mathys du bois
  • · Replies 3 ·
Replies
3
Undergrad Effective mass in terms of electron states
  • ergospherical
  • · Replies 6 ·
Replies
6
Undergrad Time Dependent Sinusoidal Perturbation Energy Conservation
  • Samama Fahim
  • · Replies 7 ·
Replies
7
Graduate Schmidt decomposition - How do I find the matrix related to the state?
  • Arquimedes
  • · Replies 1 ·
Replies
1