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 Active and Passive Transformations Confusion
  • · Replies 8 ·
Replies
8
Views
10K
High School Two questions about Black body radiation
  • · Replies 12 ·
Replies
12
Views
2K
Undergrad Physical proof of a simulation?
  • · Replies 5 ·
Replies
5
Views
1K
Undergrad Quantum Spin - If It’s Not Spinning, What Is It Doing?
  • · Replies 12 ·
Replies
12
Views
2K
Undergrad Notation of the approximation in quantum phase estimation algorithm
  • · Replies 1 ·
Replies
1
Views
1K
High School Q - Double slit experiment, delayed slit selection observation
  • · Replies 5 ·
Replies
5
Views
2K
Graduate Orthogonality of variations in Faddev-Popov method for path integral
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Weyl Fermion in an infinite well
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Significance of double slit experiment?
  • · Replies 5 ·
Replies
5
Views
2K
Graduate Does quantizing metric fields mean quantum gravity?
  • · Replies 7 ·
Replies
7
Views
1K
Undergrad Derivation of Schrodinger equation (chicken and egg problem?)
  • · Replies 17 ·
Replies
17
Views
3K
Undergrad How indistinguishable are photons?
  • · Replies 32 ·
2
Replies
32
Views
3K
Undergrad Can a static EM field consist of photons?
  • · Replies 14 ·
Replies
14
Views
2K
Undergrad Interferences (with diagonal density matrix)
  • · Replies 11 ·
Replies
11
Views
2K
Undergrad How to Find the Berry Phase in Slowly Varying Systems
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Why we know average speed of single photon equal speed of EM wave?
  • · Replies 4 ·
Replies
4
Views
1K
High School Polarization of a single photon
  • · Replies 10 ·
Replies
10
Views
4K
Graduate What is the achievable accuracy of neutrino speed measurement?
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Participatory Anthropic Principle
  • · Replies 1 ·
Replies
1
Views
2K
High School Can particles appear from "actual" nothing including no space?
  • · Replies 28 ·
Replies
28
Views
6K
Undergrad Is there a multicolor single photon?
  • · Replies 6 ·
Replies
6
Views
1K
Undergrad Are All Electrons Truly Identical?
  • · Replies 26 ·
Replies
26
Views
4K
Undergrad How does phase-sensitive detection eliminate noise?
  • · Replies 7 ·
Replies
7
Views
1K
High School Does Quantum Entanglement Suggest a Fake Universe?
  • · Replies 19 ·
Replies
19
Views
2K
Undergrad Quantum phase estimation - Question regarding rewriting the state
  • · Replies 5 ·
Replies
5
Views
2K
Graduate Solving Schrödinger's Equation with a Smooth Potential Wall: A Detailed Guide
  • · Replies 2 ·
Replies
2
Views
1K
Graduate Pauli Villars for Quadratic Divergences
  • · Replies 2 ·
Replies
2
Views
1K
High School Quantum entanglement and communications
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Understanding spinor transformation law
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Is this correct? Casimir Effect
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Stern-Gerlach experiment superposition vs mixed state
  • · Replies 2 ·
Replies
2
Views
2K
Graduate HHL quantum algorithm and the phase estimation
  • · Replies 1 ·
Replies
1
Views
1K
Graduate What are the quantum numbers used to label helium atom eigenfunctions?
  • · Replies 4 ·
Replies
4
Views
1K
Graduate Right Hand Rule in NMR and EPR?
  • · Replies 8 ·
Replies
8
Views
2K
Undergrad Online Experiment: Compton Scattering
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Why are terms like "deterministic" rarely used in Bell context
  • · Replies 12 ·
Replies
12
Views
2K
Undergrad Plasmonic - Dielectric function
  • · Replies 4 ·
Replies
4
Views
938
Undergrad When does quantum entanglement occur?
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Measurement of a qubit in the computational basis - Phase estimation
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Writing the wave function solutions for a particle in a 2-D box
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Is Information Really Preserved in Quantum Systems?
  • · Replies 8 ·
Replies
8
Views
1K
Graduate Quantum Field theory vs. many-body Quantum Mechanics
  • · Replies 36 ·
2
Replies
36
Views
6K
High School Is it really possible to slap my hand through a table?
  • · Replies 30 ·
2
Replies
30
Views
13K
High School Boundary between a particle in two energy states
  • · Replies 1 ·
Replies
1
Views
1K
High School Unraveling the Mystery: Interactions and Properties of Quantum Objects
  • · Replies 4 ·
Replies
4
Views
1K
Undergrad Can We Always Determine Eigenfunctions for an Asymmetric Top?
  • · Replies 3 ·
Replies
3
Views
2K
Graduate The experiment for testing the CHSH inequalities
  • · Replies 11 ·
Replies
11
Views
3K
Undergrad What is the difference between first and second-order vacuum polarization?
  • · Replies 10 ·
Replies
10
Views
2K
High School Double slit -- simple question
  • · Replies 26 ·
Replies
26
Views
2K
Undergrad The distracted experimentalist's problem
  • · Replies 12 ·
Replies
12
Views
1K
Undergrad Is the Fermi-Dirac distribution equal to zero at the state of highest energy?
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad CHSH inequality : renaming and absolute values
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Does entanglement of photons really facilitate telepathy?
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad How Do Kochen-Specker Theorem and Contextuality Relate to Financial Markets?
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad The atomic Coulomb potential extends to infinity?
  • · Replies 5 ·
Replies
5
Views
1K
Undergrad Defining electromagnetic waves
  • · Replies 14 ·
Replies
14
Views
1K
Undergrad How do photons transfer energy?
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Superluminal Quantum tunneling without FTL messaging
  • · Replies 14 ·
Replies
14
Views
2K
Undergrad What do the psi_3 and psi_4 components of the Dirac equation represent?
  • · Replies 8 ·
Replies
8
Views
3K
High School Particles Within Atoms: Uncovering the Mystery of Forces and Vacuum
  • · Replies 9 ·
Replies
9
Views
2K
High School Can Entangled Particles Stay Undetermined Despite Decoherence During Separation?
  • · Replies 22 ·
Replies
22
Views
2K
High School Could a parallel universe exist?
  • · Replies 11 ·
Replies
11
Views
3K
Undergrad Any other good sources on the Lamb shift other than Wikipedia?
  • · Replies 10 ·
Replies
10
Views
2K
Undergrad What is the connection between the Lamb Shift and the g factor?
  • · Replies 2 ·
Replies
2
Views
1K
High School Why do superpositions occur? What causes them to occur?
  • · Replies 46 ·
2
Replies
46
Views
4K
Undergrad Are commuting observables necessary but not sufficient for causality?
  • · Replies 6 ·
Replies
6
Views
2K
Graduate Hamiltonian in second quantization
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Solving Schrodinger's eqn using ladder operators for potential V
  • · Replies 4 ·
Replies
4
Views
3K
Undergrad The definition of the spectra in quantum mechanics
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad What gives an optimum value for electron energy to ionise atom?
  • · Replies 9 ·
Replies
9
Views
1K
Undergrad Does anyone have a collection of the Dirac Equations?
  • · Replies 1 ·
Replies
1
Views
941
Undergrad Can Dirac Delta Functional Observables Be Regarded as True Quantum Observables?
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad What is the Complex Conjugate of a Hermitian Integral in QM?
  • · Replies 7 ·
Replies
7
Views
1K
Undergrad Gauge in the Aharonov Bohm effect
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad What is the Definition of Quantum Physics?
  • · Replies 41 ·
2
Replies
41
Views
6K
High School Objective-collapse theory, collapse for large objects
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Gauge invariance confusions: symmetry vs redundancy, active vs passive
  • · Replies 47 ·
2
Replies
47
Views
6K
Undergrad Understanding Bra Ket Correspondence and Proving (1.8) Transformation
  • · Replies 3 ·
Replies
3
Views
1K
Graduate What is the point of geometric quantization?
  • · Replies 4 ·
Replies
4
Views
1K
Graduate Can Quantum Mechanics be postulated to exclude humans?
  • · Replies 44 ·
2
Replies
44
Views
5K
Undergrad What is unique about the bra in Dirac bra-ket notation?
  • · Replies 14 ·
Replies
14
Views
2K
Undergrad Physical interpretation of phase in solutions to Schrodinger's Eqn?
  • · Replies 12 ·
Replies
12
Views
5K
Undergrad Bra Ket is equivalent to inner product always?
  • · Replies 7 ·
Replies
7
Views
2K
Graduate QFT with vanishing vacuum expectation value and perturbation theory
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Weak measurement and the measurement problem
  • · Replies 4 ·
Replies
4
Views
2K
High School Why exactly do Virtual Particles not violate Conservation of energy?
  • · Replies 16 ·
Replies
16
Views
3K
Graduate Interaction between matter and antimatter in Dirac equation
  • · Replies 5 ·
Replies
5
Views
1K
Undergrad Superposition Angle Range in 2-Slit Experiment
  • · Replies 6 ·
Replies
6
Views
817
Graduate Why we can perform normal ordering?
  • · Replies 4 ·
Replies
4
Views
2K
High School Is an experiment planned to discern determinism and randomness in QM
  • · Replies 118 ·
4
Replies
118
Views
6K
Undergrad Particle and wave model understanding -- help please
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Quantization of Quasiperiodic Orbits in the Bohr-Sommerfeld Model
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Using the Schrodinger eqn in finding the momentum operator
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Feynman path integral and events beyond the speed of light
  • · Replies 57 ·
2
Replies
57
Views
5K
High School Can anyone help me with my high school paper on vacuum and quantum vacuum?
  • · Replies 1 ·
Replies
1
Views
990
Undergrad On the meaning and mathematics of rotating spin 1/2 particles
  • · Replies 7 ·
Replies
7
Views
2K
High School Why isn’t quantum entanglement just correlation?
  • · Replies 51 ·
2
Replies
51
Views
6K
High School Project on pulsars/electromagnetic quantum field
  • · Replies 8 ·
Replies
8
Views
2K
Undergrad Problem involving a sequential Stern-Gerlach experiment
  • · Replies 24 ·
Replies
24
Views
3K
High School Can the Motion of an Electron in Quantum Mechanics Be Reversed?
  • · Replies 29 ·
Replies
29
Views
2K