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 Alternative model for counterfactual definiteness in Bohm-like EPR
Understanding the Energy Differences in Multielectron Atom States
  • · Replies 5 ·
Replies
5
Views
2K
Adding Spin S1 and S2: A Puzzling Situation
  • · Replies 4 ·
Replies
4
Views
2K
Wall Street Journal on Entanglement
  • · Replies 6 ·
Replies
6
Views
3K
What are orthogonal wavefunctions?
  • · Replies 3 ·
Replies
3
Views
20K
Can quantum entangled particles be used for faster-than-light communication?
  • · Replies 5 ·
Replies
5
Views
3K
Product state and orthorgonality
  • · Replies 2 ·
Replies
2
Views
2K
The probe passes over an atom that is 3.20×10^2 nm tall.
  • · Replies 4 ·
Replies
4
Views
2K
Explaining the Hydrogen Atom Wave Function Paradox
  • · Replies 2 ·
Replies
2
Views
3K
Explaining the Uncertainty Principle
  • · Replies 9 ·
Replies
9
Views
2K
Preparing a certain superposition of electron states
  • · Replies 1 ·
Replies
1
Views
2K
Is the vacuum the same as a quantum vacuum?
  • · Replies 5 ·
Replies
5
Views
3K
How Are Math and Science Interconnected?
  • · Replies 4 ·
Replies
4
Views
8K
Commutators of Lorentz generators
  • · Replies 5 ·
Replies
5
Views
3K
What's the Difference Between Quantum and Simple Harmonic Oscillators?
  • · Replies 2 ·
Replies
2
Views
2K
Frequency Operators & Ensemble Measurements
  • · Replies 5 ·
Replies
5
Views
3K
Can the Commutator of Charges in QFT be Calculated Using Different Times?
  • · Replies 5 ·
Replies
5
Views
3K
Can Electrons Change Spin Sign?
  • · Replies 4 ·
Replies
4
Views
2K
Bound State Condition: Definition Explained
  • · Replies 5 ·
Replies
5
Views
3K
Understanding Dihydrogen Spin Isomers: An Overview and Explanation
  • · Replies 1 ·
Replies
1
Views
2K
Measuring Spectrum of Boxes A & B: Same QM System?
  • · Replies 2 ·
Replies
2
Views
2K
The Heisenberg Uncertainty Principle and velocity
  • · Replies 1 ·
Replies
1
Views
3K
Is Quantum Metaphysics Bridging Science and Spirituality Beyond Space and Time?
  • · Replies 1 ·
Replies
1
Views
3K
Virtual Particles: Disproving Energy Conservation?
  • · Replies 2 ·
Replies
2
Views
2K
Atomic Vibration Speed: m/s Conversion
  • · Replies 3 ·
Replies
3
Views
12K
Wave-particle duality and the photo-electric effect
  • · Replies 2 ·
Replies
2
Views
4K
Property that gives electrons charge.
  • · Replies 4 ·
Replies
4
Views
8K
How an electron can re-radiate an electromagnetic wave
  • · Replies 4 ·
Replies
4
Views
2K
What Temperature Yields a 25% Population Probability at 7.00 eV in Copper?
  • · Replies 1 ·
Replies
1
Views
3K
Could almost nothing really be something? Fourier series.
  • · Replies 6 ·
Replies
6
Views
2K
Missing Terms in 3.11: Investigating Second Order Terms
  • · Replies 2 ·
Replies
2
Views
2K
Critical temperature of a superconductor
  • · Replies 6 ·
Replies
6
Views
2K
Double Slit Experiment Near The Singularity of a black hole
  • · Replies 4 ·
Replies
4
Views
3K
How come there is a particle with zero mass?
  • · Replies 4 ·
Replies
4
Views
3K
Can fermion fields in QFT have dimensions other than 3/2 and 1/2?
  • · Replies 5 ·
Replies
5
Views
7K
Ladder Operator for Harmonic Oscillator: a|0> = |0>
  • · Replies 10 ·
Replies
10
Views
3K
How to operate on product state?
  • · Replies 2 ·
Replies
2
Views
2K
How Does Anti-Commutativity Affect Grassmann Number Integration?
  • · Replies 4 ·
Replies
4
Views
2K
Is the Multi-Electron Wavefunction Truly Separable?
  • · Replies 3 ·
Replies
3
Views
4K
Density Matrix in that DFT bible book
  • · Replies 1 ·
Replies
1
Views
2K
Did the Quantum Field Exist at the Beginning of Time and Space?
  • · Replies 1 ·
Replies
1
Views
2K
Meaning of Expectation Values for <x^2> and <p^2> in Classical Mechanics
  • · Replies 4 ·
Replies
4
Views
2K
Practical examples of superposition?
  • · Replies 3 ·
Replies
3
Views
13K
Stationary schrodinger equation (basic problems regarding the basis being used)
  • · Replies 3 ·
Replies
3
Views
3K
What Is the Root of Number Operator in Quantum Mechanics?
  • · Replies 1 ·
Replies
1
Views
2K
Second quantization and partial traces
  • · Replies 3 ·
Replies
3
Views
4K
What is the difference between quantum mechanics and quantum physics?
  • · Replies 3 ·
Replies
3
Views
38K
Schrodinger Equations - wave propagation
  • · Replies 8 ·
Replies
8
Views
3K
Why Does Quantum Mechanics Depend on Probability?
  • · Replies 1 ·
Replies
1
Views
2K
Formulation of Quantum Mechanics?
  • · Replies 4 ·
Replies
4
Views
2K
Tunneling effect in Supercapacitors ?
  • · Replies 1 ·
Replies
1
Views
2K
Can Quantum Mechanics Enlighten My Philosophical Ideas?
  • · Replies 7 ·
Replies
7
Views
3K
Systems with global phase invariance, 3D string?
  • · Replies 5 ·
Replies
5
Views
2K
Understanding Inelastic Collisions in Helium at Room Temperature
  • · Replies 7 ·
Replies
7
Views
3K
Studying the Zeeman Effect on Molecules
  • · Replies 1 ·
Replies
1
Views
3K
What is the paradox in Planck's Law?
  • · Replies 62 ·
3
Replies
62
Views
15K
Encryption v.s. quantum computers
  • · Replies 26 ·
Replies
26
Views
6K
Why is gold's color different from other metals?
  • · Replies 2 ·
Replies
2
Views
4K
SU(2) Spinor: Is Product of Two Scalar-Type Entity?
  • · Replies 1 ·
Replies
1
Views
2K
Why would entangled particles light years away need to be able to cancel?
  • · Replies 6 ·
Replies
6
Views
3K
Solving Infinite Square Well: Eigen Functions &amp; Solutions
  • · Replies 3 ·
Replies
3
Views
3K
The smallest measurement device
  • · Replies 8 ·
Replies
8
Views
4K
Colliding Photons: Matter-Energy Problems & Wavefunction
  • · Replies 24 ·
Replies
24
Views
12K
Quantum-classical correspondence?
  • · Replies 41 ·
2
Replies
41
Views
6K
Harmonic Oscillator energy = WKB approximate energy why?
  • · Replies 3 ·
Replies
3
Views
6K
Solving KET-BRA Notation in OPW Solid State Physics
  • · Replies 2 ·
Replies
2
Views
2K
Why do molecules not fall apart under observation?
  • · Replies 1 ·
Replies
1
Views
2K
Why do high energies correspond to small distances
  • · Replies 2 ·
Replies
2
Views
2K
QFT: Gauge Invariance, Ghosts, Symmetry & Lorentz Invariance
  • · Replies 4 ·
Replies
4
Views
3K
Question about Braket notation
  • · Replies 8 ·
Replies
8
Views
3K
The Impact of Weak Realism on Bell's Theorem and Bohmian Interpretations
  • · Replies 64 ·
3
Replies
64
Views
10K
Time Dependent Schrodinger Equation -> T(t) solution
  • · Replies 13 ·
Replies
13
Views
4K
Introductory books on quantum mechanics
  • · Replies 3 ·
Replies
3
Views
4K
Dirac's Coupling to an electromagnetic field and schroedingers
  • · Replies 2 ·
Replies
2
Views
3K
Dot product of two pauli matrices
  • · Replies 5 ·
Replies
5
Views
10K
Why Do Photons Follow a Sine Wave Pattern Instead of Other Paths?
  • · Replies 2 ·
Replies
2
Views
2K
U(1):?:SU(3) 1D:2D:3D harmonic oscillator.
  • · Replies 2 ·
Replies
2
Views
3K
3-d harmonic oscillator and SU(3) - how to imagine it?
  • · Replies 4 ·
Replies
4
Views
6K
Energy Conservation in an expanded 1D box
  • · Replies 3 ·
Replies
3
Views
2K
Does quantum mechanical definition of momentum require movement ?
  • · Replies 21 ·
Replies
21
Views
9K
Copenhagen interpretation of Quantum Theory
  • · Replies 49 ·
2
Replies
49
Views
14K
Hydrogen spectrum hyperfine structure
  • · Replies 1 ·
Replies
1
Views
4K
Classical counterpart of the quantum |nlm> states
  • · Replies 1 ·
Replies
1
Views
2K
What Causes the Expansion of Our Universe?
  • · Replies 30 ·
2
Replies
30
Views
4K
Choice of source photon production in entanglement experiments
  • · Replies 2 ·
Replies
2
Views
3K
Does the Hartree Approximation Ignore Electron Interactions?
  • · Replies 1 ·
Replies
1
Views
2K
Explaining quantum coherence to a layman
  • · Replies 1 ·
Replies
1
Views
3K
Velocity, density, ect. : air : molecules spinor field :?:?
  • · Replies 3 ·
Replies
3
Views
2K
What exactly is an oscillator in quantum physical context?
  • · Replies 3 ·
Replies
3
Views
2K
Has entanglement in quantum physics been experimentally validated?
  • · Replies 30 ·
2
Replies
30
Views
5K
Question about spacetime quantization
  • · Replies 4 ·
Replies
4
Views
2K
Elementary Particles with Zero Spin?
  • · Replies 1 ·
Replies
1
Views
2K
Drawbacks of bohr's model of atom
  • · Replies 1 ·
Replies
1
Views
6K
How do you transition from the QED Lagrangian to classical electrodynamics?
  • · Replies 5 ·
Replies
5
Views
3K
Why No Decoherence in Double Slit Experiment?
  • · Replies 7 ·
Replies
7
Views
3K
Explaining Hydrogen Atom's Line Spectra: The Rutherford Atomic Model
  • · Replies 22 ·
Replies
22
Views
3K
QCD \Lambda Parameter: Definition & Its Role in Non-Perturbative QCD
  • · Replies 4 ·
Replies
4
Views
8K
Wave propagation, +z or -z
  • · Replies 1 ·
Replies
1
Views
2K
EM Field strength and plane waves
  • · Replies 2 ·
Replies
2
Views
2K
Heisenberg uncertainty - uncertainty about its meaning
  • · Replies 50 ·
2
Replies
50
Views
13K
What does it mean that two particles have opposite spins?
  • · Replies 10 ·
Replies
10
Views
5K