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
Undergrad Spin conservation in the Dirac equation
  • · Replies 5 ·
Replies
5
Views
3K
Graduate Null measurement in the which-path experiments
  • · Replies 12 ·
Replies
12
Views
2K
Graduate Quantizing the complex Klein-Gordon field
  • · Replies 2 ·
Replies
2
Views
3K
Undergrad Wave function collapse and measurement rule
  • · Replies 4 ·
Replies
4
Views
2K
High School Is Schrodinger's Cat a True Reflection of Quantum Uncertainty?
  • · Replies 30 ·
2
Replies
30
Views
4K
Undergrad Finite square well bound states
  • · Replies 1 ·
Replies
1
Views
2K
High School Conjugation , involving operators in Dirac Notation.
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Clarification on what we can consider a qubit to be
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad How Does Measurement Affect Uncertainty in Quantum Mechanics?
  • · Replies 8 ·
Replies
8
Views
2K
Undergrad Quantum Computing and Superposition of states
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Is consciousness necessary to collapse the wave function?
  • · Replies 15 ·
Replies
15
Views
3K
Undergrad Momentum/Position space wave function
  • · Replies 3 ·
Replies
3
Views
3K
Undergrad Can Quantum Entanglement Be Used to Transfer Information?
  • · Replies 3 ·
Replies
3
Views
2K
High School Projection Operators: Explaining |m|2*|m|2 = |m|4
  • · Replies 10 ·
Replies
10
Views
2K
Undergrad Deriving GHZ Theorem for 3 Particles: A Detailed Guide
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad What is the physical meaning of Bogoliubov transformation?
  • · Replies 7 ·
Replies
7
Views
3K
Undergrad Definition and Rules of Quantum State Observation
  • · Replies 1 ·
Replies
1
Views
1K
High School Photon particle independent of wave question
  • · Replies 21 ·
Replies
21
Views
2K
Graduate Atomic state that is a coherent superposition?
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Neutrino masses and oscillation
  • · Replies 15 ·
Replies
15
Views
1K
Undergrad Distribution of Position in classical & quantum case
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Dynamical Casmir Effect in expanding space?
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Exploring Spontaneous Decay in QM with Griffiths
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad What Happens When a Black Hole Reaches the End of Its Life?
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Commuting observables for Fermion fields?
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Non-Computability of Hidden Variables
  • · Replies 7 ·
Replies
7
Views
2K
Undergrad Degenerate Perturbation Theory
  • · Replies 7 ·
Replies
7
Views
3K
Undergrad Quantum Scattering Differential Probability
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Can Quantum Mechanics Be Both Probabilistic and Deterministic?
  • · Replies 22 ·
Replies
22
Views
3K
Undergrad Uncertainty relation derivation
  • · Replies 1 ·
Replies
1
Views
1K
High School Polarization Basis: Measuring Entangled Photons in 45/135
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad Two-State Vector Formalism - I like it
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Photon direction as hidden variable in a double slit expt?
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Pauli exclusion principle explained
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Momentum Energy tensor and Wilson Loop in Yang-Mills Theory
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Can something be caused and be ontologically random?
  • · Replies 2 ·
Replies
2
Views
1K
Graduate Is there a gravitational variant of the Schwinger limit?
  • · Replies 24 ·
Replies
24
Views
4K
Graduate Confusion about the Z factor(Renormalization factor)
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Difference between Schrodinger's equation and wave function?
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Exploring QM in Virtual Gravity: Rindler and Rotating Systems
  • · Replies 2 ·
Replies
2
Views
1K
Graduate Calculating the spontaneous emission rate for a material
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Relativistic hidden variable quantum mechanics?
  • · Replies 122 ·
5
Replies
122
Views
11K
High School Testing spacetime collapse at absolute zero
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad There are no particles, only fields
  • · Replies 11 ·
Replies
11
Views
3K
High School What, in essence, distinguishes light from matter?
  • · Replies 25 ·
Replies
25
Views
3K
High School Feynman experiment with bullets
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Why do we need the position operator?
  • · Replies 3 ·
Replies
3
Views
1K
High School F = dP/dt on subatomic particles
  • · Replies 24 ·
Replies
24
Views
3K
Undergrad Why Does a Blackbody Emit Broadband Radiation from Monochromatic Light?
  • · Replies 23 ·
Replies
23
Views
3K
Undergrad What is the criteria for bound states
  • · Replies 7 ·
Replies
7
Views
1K
Undergrad What's the significance of HUP if Ψ collapses?
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Two particles Dirac type equation question
  • · Replies 2 ·
Replies
2
Views
1K
High School Do Black Holes Destroy Information?
  • · Replies 17 ·
Replies
17
Views
3K
Undergrad Photon Directionality: Do Opposite Photons Change Direction?
  • · Replies 4 ·
Replies
4
Views
1K
High School Is Max Born's probabilistic proposal artificial?
  • · Replies 10 ·
Replies
10
Views
2K
Undergrad The weak force as an attractive force
  • · Replies 13 ·
Replies
13
Views
3K
Undergrad How good is this PBS video at explaining weak hyper-charge?
  • · Replies 1 ·
Replies
1
Views
3K
Undergrad What is the meaning of coherent states of mean photon number
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad What happens if B measures the x-axis spin in an entangled pair?
  • · Replies 11 ·
Replies
11
Views
2K
Undergrad Quantum Zeno effect to influence a particle's movement
  • · Replies 15 ·
Replies
15
Views
2K
Undergrad How Does the Dirac Equation Utilize Component Functions in Its Derivation?
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Tunneling through a finite potential barrier
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Is Braket Notation Causing Confusion in Quantum Mechanics?
  • · Replies 7 ·
Replies
7
Views
1K
High School Quick question about Bloch's sphere
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Why is radioactive decay so rare?
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad History of the Universe and measured outcomes
  • · Replies 12 ·
Replies
12
Views
2K
Graduate Vacuum in QFT: Fock space or effective potential?
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad SU(3) Generators & Physical Quantity Corresp.
  • · Replies 11 ·
Replies
11
Views
2K
Graduate Helium atom, variation method and virial theorem
  • · Replies 1 ·
Replies
1
Views
4K
Undergrad Perturbative versus nonperturbative quantum mechanics
  • · Replies 14 ·
Replies
14
Views
2K
Graduate How Does a Particle's Energy State Change in a Non-Uniform 2D Corridor?
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad How to pick an operator onto which the wavefunction collapses
  • · Replies 5 ·
Replies
5
Views
2K
High School The setup of "2012 entanglement between photons that (....)"
  • · Replies 25 ·
Replies
25
Views
3K
Undergrad Help with Schoedinger´s equation when V(x)=0
  • · Replies 9 ·
Replies
9
Views
2K
Undergrad Find the energy from the graph of the wave function
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Determining the state from observation?
  • · Replies 11 ·
Replies
11
Views
2K
Undergrad Correlation setup between past and present
  • · Replies 6 ·
Replies
6
Views
1K
High School Can we observe 2 electrons at the same time?
  • · Replies 22 ·
Replies
22
Views
3K
Undergrad Does the concept of infinite parallel universes justify absurdities?
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad What's the effect of E-field for an electron in a solid?
  • · Replies 1 ·
Replies
1
Views
1K
High School Library of Babel quantum state
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Cause and effect and quantum field theory
  • · Replies 3 ·
Replies
3
Views
1K
Graduate Discrete Models for Arguments and Continuous Variables in Quantum Mechanics
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Spin Angular Momentum Dirac Equation
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad What does this equation for a free particle mean?
  • · Replies 20 ·
Replies
20
Views
3K
Undergrad Photon emission, power output (and black holes)
  • · Replies 47 ·
2
Replies
47
Views
4K
Insights Interview with Mathematician and Physicist Arnold Neumaier - Comments
  • · Replies 38 ·
2
Replies
38
Views
8K
Graduate Semi Classical Explanation of Stimulated Emission
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Rigorous interacting effective QFT in d=4?
  • · Replies 18 ·
Replies
18
Views
3K
Graduate Information of system vs system, apparatus and environment
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Heisenberg and the wave-particle dualism
  • · Replies 7 ·
Replies
7
Views
2K
Undergrad Ehrenfest Theorem: Enunciate & Implications for Classical/Quantum Mechanics
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Heisenberg Uncertainty vs Measurement Error
  • · Replies 48 ·
2
Replies
48
Views
5K
Undergrad Is the Dirac free equation actually free
  • · Replies 13 ·
Replies
13
Views
2K
Graduate Equation in a paper about Dicke states
  • · Replies 2 ·
Replies
2
Views
1K
Graduate What does this article mean? (The holographic principle and M-cosmology)
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Two particle system, products and entanglement
  • · Replies 35 ·
2
Replies
35
Views
5K
Graduate Is irreducibility justified as a Wightman axiom?
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Epistemic view of the wave function leads to superluminal signal
  • · Replies 41 ·
2
Replies
41
Views
4K
Undergrad Help with a partition function calculation
  • · Replies 1 ·
Replies
1
Views
1K