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 Valid local explanation of Bell violations? (Pegg et al., 1999; 2008)
Undergrad Photon interference and path differences
  • · Replies 18 ·
Replies
18
Views
2K
Undergrad Does Bell's theorem imply other Lorentz transformations?
  • · Replies 13 ·
Replies
13
Views
2K
High School Layman's question re quantum entanglement
  • · Replies 12 ·
Replies
12
Views
2K
Undergrad Momentum-Position vs. Energy-Time Uncertainty Relations
  • · Replies 10 ·
Replies
10
Views
2K
What did Hans Bethe think of von Neumann's quantum logic?
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad What happens when an object starts to glow?
  • · Replies 11 ·
Replies
11
Views
3K
Graduate Understanding Harmonic oscillator conventions
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad What Is the Physical Meaning of Atomic Particle 'Spin'?
  • · Replies 15 ·
Replies
15
Views
2K
Undergrad Collapse of the wave function under simultaneous measurement
  • · Replies 2 ·
Replies
2
Views
1K
High School Quantum mechanical model of an atom
  • · Replies 7 ·
Replies
7
Views
1K
Undergrad Master` Equation for the Penrose-Diosi wavefunction collapse
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Photon occupation numbers in relation to the 4-potential
  • · Replies 26 ·
Replies
26
Views
3K
Undergrad What is SR transformarion for bispinor?
  • · Replies 49 ·
2
Replies
49
Views
5K
Undergrad General Implications of the Double-Slit Experiment
  • · Replies 1 ·
Replies
1
Views
2K
High School The Virtue of Individual Perception RE: Wavefunction Collapse
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Let me Know What you Think of This Toy Theory
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad Is the energy of a burst of light the sum of the energy of each photon?
  • · Replies 28 ·
Replies
28
Views
2K
Undergrad Trying to Generate Entangled Photons
  • · Replies 6 ·
Replies
6
Views
2K
Graduate Unitary representations of Lie group from Lie algebra
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Calculating group representation matrices from basis vector/function
  • · Replies 6 ·
Replies
6
Views
2K
High School Entanglement: Behaviour of Particles & Real Life Apps
  • · Replies 11 ·
Replies
11
Views
2K
Graduate The cnot with outer product control qubit
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad How Would Afshar's Experiment Affect Entanglement?
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Exclusion principle and the distance between two particles
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad Polarization and Stimulated Emission
  • · Replies 20 ·
Replies
20
Views
2K
Undergrad Is a Particle Simply the Manifested Kinetic Energy of Its Quantum Field?
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Minimum number of cycles in a short pulse laser
  • · Replies 6 ·
Replies
6
Views
2K
Graduate Dirac Field quantization and anti-commutator relation
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Is there a reason eigenvalues of operators correspond to measurements?
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad The HOM Effect, Path Entanglement, and Generation
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Dispersive approximation (limit) in the Jaynes-Cummings Model
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Hamiltonian Commutation Question
  • · Replies 6 ·
Replies
6
Views
1K
High School Is Bell's inequality Lorentz invariant?
  • · Replies 2 ·
Replies
2
Views
1K
High School Notion of a zero dimensional point particle?
  • · Replies 4 ·
Replies
4
Views
2K
Graduate First Chip-to-Chip Quantum Teleportation
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Does Dim Reg really avoid a photon mass?
  • · Replies 10 ·
Replies
10
Views
2K
High School Backscattering of photons in dim = 1
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad Understanding Spherical Tensors & Their Applications
  • · Replies 2 ·
Replies
2
Views
2K
High School Neutron Decay Outside of a Nucleus Near Absolute Zero
  • · Replies 3 ·
Replies
3
Views
1K
Graduate Measurements of multipartite entanglement
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Imagining the EPR paradox/quantum entanglement
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad Entanglement after measurement
  • · Replies 16 ·
Replies
16
Views
2K
Undergrad The construction of particles in QFT
  • · Replies 70 ·
3
Replies
70
Views
7K
Graduate Trace of a product of Dirac Matrices in a Fermion loop
  • · Replies 5 ·
Replies
5
Views
3K
Undergrad How does a quantum computer work?
  • · Replies 7 ·
Replies
7
Views
2K
Undergrad Momentum Eigenstates: Writing & Conservation
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Why Do We Have The Effect Of Spontaneous Emission And Absorption
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad What are the degrees of freedom of a quark?
  • · Replies 14 ·
Replies
14
Views
3K
Undergrad Wave function of a laser beam?
  • · Replies 6 ·
Replies
6
Views
3K
High School Do photons bunch up at an interface? Can they lase (laze?)
  • · Replies 17 ·
Replies
17
Views
1K
Undergrad Can a simulation hypothesis simulate quantum physics?
  • · Replies 10 ·
Replies
10
Views
2K
Graduate Vacuum energy density after spontaneous symmetry breaking
  • · Replies 5 ·
Replies
5
Views
2K
High School Photon Energy & Wave Amplitude
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Local Causality and Bell's Second Theorem
  • · Replies 48 ·
2
Replies
48
Views
6K
Undergrad Did Erwin Schrödinger propose that reality could be contradictory?
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad About the repulsive force between two electrons
  • · Replies 7 ·
Replies
7
Views
2K
Undergrad Can we physically realize unbound states?
  • · Replies 16 ·
Replies
16
Views
2K
High School Can Hydrogen Atoms on Earth and the Moon Share Electrons?
  • · Replies 27 ·
Replies
27
Views
3K
Undergrad Finding the Error in Computing Spherical Tensor of Rank 0 Using General Formula
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad The free particle in spherical coordinates
  • · Replies 1 ·
Replies
1
Views
1K
High School What is the speed of electron movement in atoms at different temperatures?
  • · Replies 7 ·
Replies
7
Views
2K
Undergrad Why is the lowest energy level close to the center?
  • · Replies 5 ·
Replies
5
Views
1K
Undergrad Information in a light beam relative to the width of the beam?
  • · Replies 6 ·
Replies
6
Views
1K
Graduate The probability of finding R out of N bosons in one half of a volume
  • · Replies 23 ·
Replies
23
Views
3K
Undergrad Equal or larger/smaller versus larger/smaller in boundary conditions
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Superposition of Phases: A Key Concept in Connecting QFT and Statistical Physics
  • · Replies 12 ·
Replies
12
Views
2K
High School Exploiting radiocarbon dating for FTL communication
  • · Replies 5 ·
Replies
5
Views
1K
High School Position of a particle and photons
  • · Replies 16 ·
Replies
16
Views
2K
Undergrad Functional Derivatives: Overview & Tips
  • · Replies 1 ·
Replies
1
Views
1K
High School The use of the dx in the quantum state vector integral
  • · Replies 1 ·
Replies
1
Views
1K
High School How to teach beginners in quantum theory the POVM concept
  • · Replies 62 ·
3
Replies
62
Views
10K
Undergrad How does the N signify the indistinguishability in the Gibbs Paradox?
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad Why are cumulants extensive and moments are not?
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad Quantum state variable for entangled system
  • · Replies 8 ·
Replies
8
Views
1K
Undergrad Location of the quantum effect
  • · Replies 1 ·
Replies
1
Views
867
Undergrad Rigged Hilbert Space X: Eq (1) and (2)
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Higgs Boson: What Gave Quarks & Leptons Mass?
  • · Replies 14 ·
Replies
14
Views
2K
Undergrad Cosmic Rays could reveal if we're actually living in a simulation?
  • · Replies 9 ·
Replies
9
Views
2K
Graduate Classical limit of the propagator
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad How Do Quantum Equations Predict Outcomes in Research?
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad Can Different Shapes of Slits Affect the Diffraction Pattern of Single Photons?
  • · Replies 11 ·
Replies
11
Views
2K
Undergrad What happens if a low energy photon collides with an atom in the ground state?
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad QM & Motion: Is There Consensus?
  • · Replies 5 ·
Replies
5
Views
1K
High School The nature of virtual photons in quantum electrodynamics
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad QED & In-Ground Electrons: Why No Photon Emission?
  • · Replies 9 ·
Replies
9
Views
2K
Graduate Fermion mass terms in Peskin and Schroeder's book
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad Taking a partial trace of a multipartite state for measurement
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Using the Variational Method to get higher sates
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad An elementary question about rotations
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Why in BEC we must separate number of particles of ground state?
  • · Replies 5 ·
Replies
5
Views
1K
Graduate Vibrational relaxation through electron-hole pairs
  • · Replies 1 ·
Replies
1
Views
875
Undergrad Do macro objects get entangled?
  • · Replies 140 ·
5
Replies
140
Views
12K
Undergrad Why don't Cooper electrons accelerate infinitely?
  • · Replies 17 ·
Replies
17
Views
2K
Graduate Stuck on evaluating this functional determinant
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Difference between electrodynamic suspension (EDS) & quantum levitation?
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Integral in a variational principle problem
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Expectation Value of a Stabilizer
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Constructive QFT - current status
  • · Replies 60 ·
3
Replies
60
Views
6K
Graduate Vector and Axial vector currents in QFT
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Even/Odd solutions for particles in boxes
  • · Replies 6 ·
Replies
6
Views
2K