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
Graduate Crystal field when inversion is absent
  • · Replies 4 ·
Replies
4
Views
1K
Undergrad Why don't we use the Schrodinger Uncertainty Principle?
  • · Replies 19 ·
Replies
19
Views
3K
Undergrad Possible measurements of z-component of angular momentum
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Can a clock inside a box solve the mystery of Schroedinger's Cat?
  • · Replies 21 ·
Replies
21
Views
3K
Undergrad Wilsonian viewpoint and wave function reality
  • · Replies 141 ·
5
Replies
141
Views
12K
Undergrad Second quantization and creation/annih. operators
  • · Replies 3 ·
Replies
3
Views
2K
High School Quantum Model of Contact Forces
  • · Replies 25 ·
Replies
25
Views
2K
Undergrad Question about Uncertainty Principle
  • · Replies 9 ·
Replies
9
Views
2K
Undergrad Some questions regarding quantum fluctuations
  • · Replies 4 ·
Replies
4
Views
3K
Undergrad What is the Quantum Circuit Simulator?
  • · Replies 7 ·
Replies
7
Views
2K
Graduate Hamiltonian of the quantised Klein-Gordon theory
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Energy conservation and information conservation
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad What does simplicial mean in the context of QM?
  • · Replies 7 ·
Replies
7
Views
1K
High School Ψ=f(r)exp[-i(Et-pz+Φ/2)] a Q.M. wave function?
  • · Replies 7 ·
Replies
7
Views
2K
Undergrad Is there a difference between EM waves and photon wavefunctions?
  • · Replies 51 ·
2
Replies
51
Views
10K
Undergrad Schrödinger Potential Fields with no Energy Quantisation?
  • · Replies 35 ·
2
Replies
35
Views
4K
Undergrad Relationship between E-field and Probability Amplitude of Waves
  • · Replies 8 ·
Replies
8
Views
4K
High School Measuring photon momentum without annihilating it
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad 2 particles created around event horizon: out or inside?
  • · Replies 5 ·
Replies
5
Views
1K
Undergrad Can you have a high temperature with very little heat?
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad Do wavefunctions have to be in the form of \(Ae^{ikx}\)?
  • · Replies 10 ·
Replies
10
Views
2K
Undergrad What is the complex conjugate of the momentum operator?
  • · Replies 25 ·
Replies
25
Views
9K
High School Black Holes, Information Loss and Causality Query
  • · Replies 10 ·
Replies
10
Views
2K
Undergrad Does this wavefunction make sense?
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Free particle in a central potential
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Why can’t force-carrying particle (spin 0, 1, 2) be detected
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Pseudorandom Entanglement and Special Relativity
  • · Replies 61 ·
3
Replies
61
Views
6K
Graduate Quantum challenge: mathematical paradoxes
  • · Replies 19 ·
Replies
19
Views
4K
Undergrad What was Niels Bohr's rebuke to Schrödinger's Cat?
  • · Replies 17 ·
Replies
17
Views
4K
Undergrad Understanding Bloch's Theorem: Does 'n' Label Energy Bands?
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Time-ordering fermion operators
  • · Replies 1 ·
Replies
1
Views
3K
High School Is classical mechanics philosophically sound?
  • · Replies 3 ·
Replies
3
Views
2K
High School Superposition of measurement apparatus
  • · Replies 11 ·
Replies
11
Views
2K
Graduate Treatment of singlets in the Hubbard model
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Down convertor 2 photon entanglement - explanation?
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad What is the physical significance of <x'|x> in quantum mechanics?
  • · Replies 124 ·
5
Replies
124
Views
11K
Undergrad Temperature in quantum systems
  • · Replies 8 ·
Replies
8
Views
1K
Undergrad The postulate of Quantum Mechanics and Eigenvalue equation
  • · Replies 5 ·
Replies
5
Views
2K
High School Multi or single quantum state?
  • · Replies 7 ·
Replies
7
Views
2K
Undergrad Momentum operator on positon/momentum representation
  • · Replies 9 ·
Replies
9
Views
2K
Undergrad Quantum number and energy levels
  • · Replies 2 ·
Replies
2
Views
2K
High School Entangled Particles: Understanding the Interaction
  • · Replies 8 ·
Replies
8
Views
2K
High School Why the "rush" to quantum spookiness
  • · Replies 25 ·
Replies
25
Views
3K
Undergrad What does "completeness" mean in completeness relations
  • · Replies 13 ·
Replies
13
Views
10K
Graduate One-Way Quantum Steering Evidence: Quantumness Experiments
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad The Higgs and virtual particles
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Eigenfunctions and eigenvalues
  • · Replies 7 ·
Replies
7
Views
2K
Undergrad Exact meaning of the Uncertainty Relations
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad When should one eigenvector be split into two (same span)?
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Entaglement, locality, and information
  • · Replies 5 ·
Replies
5
Views
1K
Undergrad Does photoelectric effect include light with threshold freq?
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Quantization of electromagnetic field
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad Inner products and adjoint operators
  • · Replies 8 ·
Replies
8
Views
2K
Graduate Is the vacuum a thermal state?
  • · Replies 1 ·
Replies
1
Views
2K
High School 2 events in a planck time not violate conservation of energy
  • · Replies 15 ·
Replies
15
Views
3K
High School Can different types of particles be entangled with one another ?
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Identical particles distinguished by their trajectory?
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Why can't someone be both a mathematician and a physicist?
  • · Replies 15 ·
Replies
15
Views
3K
High School Measurement and the creation/loss of information
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Angular Momentum, classical vector analogy?
  • · Replies 1 ·
Replies
1
Views
1K
Canadian PM 'Explain's' Quantum Computing
  • · Replies 3 ·
Replies
3
Views
1K
High School What constitutes a measurement of which slit - double slit
  • · Replies 14 ·
Replies
14
Views
2K
Undergrad Where exactly does QFT differ from QM? (in their formalisms)
  • · Replies 35 ·
2
Replies
35
Views
6K
High School Quantum definition of information
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad Quantum numbers - Total Energy and Orbital Momentum
  • · Replies 5 ·
Replies
5
Views
2K
High School Disentanglemt of a system of particles
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Can Decoherence Create a Superposition of Life and Death?
  • · Replies 15 ·
Replies
15
Views
3K
High School What is ¨unpolarized¨ light exactly?
  • · Replies 59 ·
2
Replies
59
Views
6K
Undergrad Spin 1/2 particle confined to an infinite annular region.
  • · Replies 1 ·
Replies
1
Views
1K
High School Has the Casimir effect been directly observed?
  • · Replies 2 ·
Replies
2
Views
1K
Graduate Potential Energy Curve for Ammonia Inversion?
  • · Replies 4 ·
Replies
4
Views
2K
High School About the Lorentz invariance of Planck constant
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Is a Hadron a Quasiparticle in Condensed Matter Physics?
  • · Replies 33 ·
2
Replies
33
Views
4K
Undergrad Why is the spin of this state equal to one?
  • · Replies 6 ·
Replies
6
Views
2K
Graduate Symmetry considerations between observer and observed in QM
  • · Replies 14 ·
Replies
14
Views
2K
Undergrad Determination of electron energy in the 2 slit experiment
  • · Replies 8 ·
Replies
8
Views
2K
High School Alpha is 1/137th of what? (Fine Structure Constant)
  • · Replies 8 ·
Replies
8
Views
4K
Undergrad Understanding the Energy Gap and Topology in Topological Phase Transitions"
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad What is meant by the terminology "single particle state"?
  • · Replies 20 ·
Replies
20
Views
6K
Undergrad Difference between superposition and mixed state
  • · Replies 15 ·
Replies
15
Views
4K
Undergrad Where Does Light Come From and How Is It Produced?
  • · Replies 3 ·
Replies
3
Views
2K
High School What causes recombination of virtual particles?
  • · Replies 6 ·
Replies
6
Views
2K
High School Is it possible that god does not play dice with the universe, as Einstein said?
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Eigenvalue degeneracy in real physical systems
  • · Replies 176 ·
6
Replies
176
Views
14K
High School Silly questions about the behaviour of photons
  • · Replies 3 ·
Replies
3
Views
1K
Graduate What kind of coherence do we have in the ground state of a harmonic oscillator?
  • · Replies 15 ·
Replies
15
Views
3K
High School FTL communication by Quantum Entanglement
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Quantum jitter vs thermal jitter
  • · Replies 8 ·
Replies
8
Views
2K
Undergrad Hydrogen Atom Photon Emission Wavelength Formula
  • · Replies 11 ·
Replies
11
Views
3K
Graduate Degenerate perturbation theory -- Sakurai
  • · Replies 3 ·
Replies
3
Views
4K
Undergrad Polarization entanglement - multiple tests
  • · Replies 8 ·
Replies
8
Views
2K
High School How Does Environmentally Induced Decoherence Affect Quantum State Reduction?
  • · Replies 280 ·
10
Replies
280
Views
23K
High School Is this QM learning pathway sound?
  • · Replies 15 ·
Replies
15
Views
2K
Undergrad Unit and dimension about De broglie wave
  • · Replies 3 ·
Replies
3
Views
2K
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