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 New interpretation for the double slit experiment with light?
Graduate Hermitian operator <=> observable?
  • · Replies 17 ·
Replies
17
Views
13K
Graduate Constructing quantum operators
  • · Replies 10 ·
Replies
10
Views
3K
Graduate Interference of two independent electron beams?
  • · Replies 6 ·
Replies
6
Views
2K
Graduate How to expand the average <(N - <N>)^2>
  • · Replies 6 ·
Replies
6
Views
2K
Graduate Complex Vector Space Analogy To Quantum Mechanics
  • · Replies 10 ·
Replies
10
Views
3K
Graduate Heisenberg uncertainty principle
  • · Replies 6 ·
Replies
6
Views
3K
Graduate Coherent state of photons in a laser
  • · Replies 6 ·
Replies
6
Views
3K
Graduate Some thoughts on the hidden variables interpertation
  • · Replies 2 ·
Replies
2
Views
1K
Graduate Can Quantum Theory Apply to Large-Scale Universe Phenomena?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Calculating Secondary Electron Energy After 2 MeV Photon Scattering
  • · Replies 3 ·
Replies
3
Views
2K
Graduate The electron - couple questions
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Understanding the Quantum of Light: The Mystery of Photons Explained
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Double Slit Experiment Question
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Determinism & Scale: Quantum Effects on Macroscopic Objects
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Completeness relation for polarization vectors
  • · Replies 2 ·
Replies
2
Views
7K
High School What is the box in particle in a box?
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Is commutativity transitive for non degenerate eigenvalues?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Magnetic moment of the electron and spin
  • · Replies 7 ·
Replies
7
Views
2K
Graduate What is Isospin and How Does it Relate to the Strong Force?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Wave-Particle Duality: Random Photon Emission
  • · Replies 5 ·
Replies
5
Views
2K
Graduate Is objective reality possible under orthodox QM?
  • · Replies 13 ·
Replies
13
Views
3K
Graduate Change in fine structure constant
  • · Replies 18 ·
Replies
18
Views
5K
Graduate How did Schrodinger's model improve Bohr's model?
  • · Replies 2 ·
Replies
2
Views
14K
Graduate Stationary States and time-independent states (aren't they the same?)
  • · Replies 4 ·
Replies
4
Views
3K
Graduate Quantum particle in a rigid box with 2 given wavefunctions solving for energies
  • · Replies 3 ·
Replies
3
Views
2K
Graduate What does a deBroglie wave look like?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Amount of energy required to change the spin of a photon
  • · Replies 15 ·
Replies
15
Views
4K
Graduate Probability of finding particle
  • · Replies 6 ·
Replies
6
Views
3K
Graduate Bras and kets vs. Einstein summation convention
  • · Replies 5 ·
Replies
5
Views
4K
Graduate Quantum Distance? (See me derive it.)
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Is the Hydrogen Energy Level Formula Truly Degenerate in j?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Why must Quantum Computers be reversible?
  • · Replies 5 ·
Replies
5
Views
4K
Graduate Could a Semiconductor Plate Alter the Casimir Effect?
  • · Replies 6 ·
Replies
6
Views
2K
Graduate The Origins of Quantum Physics
  • · Replies 6 ·
Replies
6
Views
2K
Graduate What happens to the wave function after it collapses?
  • · Replies 10 ·
Replies
10
Views
4K
Undergrad Bohr model electron wavelengths
  • · Replies 4 ·
Replies
4
Views
3K
Graduate How Do Quantum Statistics Affect Energy Level Degeneracies in a SHO?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Angle Between Spins: Alpha & Beta | Why?
  • · Replies 9 ·
Replies
9
Views
3K
Graduate Looking for suggestions for an experiment involving Quantum theory and Biology?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Quantum Computer, how to actually build one?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Schrodinger equation, lowest potential energy
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Sign confusions on CFT (yellow book) Page 29
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Wave Function Question: Understanding |0,f\rangle & \hat{c}_{\vec{k},\sigma}^+
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad Heisenberg s uncertainity principle
  • · Replies 8 ·
Replies
8
Views
2K
Undergrad Where does the energy for electron movement in orbitals originate?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Measuring Electron Position with Photon: The Uncertainty Principle
  • · Replies 6 ·
Replies
6
Views
3K
Graduate Photon Wave Packet Envelope Question
  • · Replies 17 ·
Replies
17
Views
9K
Graduate Understanding Tensor Integration Notation for 4-Dimensional Space
  • · Replies 2 ·
Replies
2
Views
2K
Graduate The picture in the addition, you see one integral equation and I have
  • · Replies 2 ·
Replies
2
Views
1K
Graduate Are Spin and Quantum States Independent in Wave Functions?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Spontaneous Symmetry Breaking -Conceptual Question
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Simple harmonic oscillator- the probability density function
  • · Replies 11 ·
Replies
11
Views
28K
Graduate Trace of a Matrix: Definition & Analysis
  • · Replies 9 ·
Replies
9
Views
16K
Graduate Why can the spin and the angular momentum transform to each other?
  • · Replies 13 ·
Replies
13
Views
3K
Graduate Limit to SHO / EM field analogy
  • · Replies 16 ·
Replies
16
Views
2K
Undergrad Are Pauli Matrices Unitary and Do Their Complex Conjugates Match?
  • · Replies 7 ·
Replies
7
Views
10K
Graduate Understanding the Disappearance of 2*A^*<A> and 2*B^*<B> in Derivations
  • · Replies 6 ·
Replies
6
Views
2K
Graduate Why Do Photons Disappear in a Perfectly Sealed Box?
  • · Replies 16 ·
Replies
16
Views
3K
Graduate Why Does Quantum Mechanics Use Complex Probability Amplitudes?
  • · Replies 7 ·
Replies
7
Views
2K
Graduate Green's function for Klein-Gordon equation in x-space
  • · Replies 5 ·
Replies
5
Views
6K
Undergrad Kenetic Energy of a Particle due to Speed
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Why does electromagnetic radiation (energy) excite electrons?
  • · Replies 6 ·
Replies
6
Views
6K
Graduate Do Electron Holes Have Spin Angular Momentum?
  • · Replies 15 ·
Replies
15
Views
15K
Graduate Can we measure the effective mass of charge carriers using a centrifuge?
  • · Replies 24 ·
Replies
24
Views
5K
Graduate Need clarification on quantum indeterminism
  • · Replies 8 ·
Replies
8
Views
3K
Graduate Entanglement across different frames of references
  • · Replies 4 ·
Replies
4
Views
3K
Graduate Questions about information in QM
  • · Replies 8 ·
Replies
8
Views
2K
Graduate Unitarity of Time-evolution Operator
  • · Replies 6 ·
Replies
6
Views
3K
Graduate Encyclopedia of Gamma Matrix Representations?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate A couple of easy questions related to quantum mechanics
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Time Dependence of Expectation Values
  • · Replies 7 ·
Replies
7
Views
3K
Graduate Understanding Normalization Factors in Scientific Research
  • · Replies 6 ·
Replies
6
Views
2K
Graduate Could Electrons Exist in 4 Dimensions?
  • · Replies 6 ·
Replies
6
Views
3K
Graduate What is Heisenberg Uncertainty Formula?
  • · Replies 3 ·
Replies
3
Views
2K
Graduate What experiment best demonstrates electron radiation?
  • · Replies 5 ·
Replies
5
Views
2K
Graduate No general quantization recipe?
  • · Replies 4 ·
Replies
4
Views
1K
Undergrad What's the motivation of using silver atoms in the Stern-Gerlach experiment？
  • · Replies 5 ·
Replies
5
Views
7K
Graduate Time dependent pertubation theory
  • · Replies 2 ·
Replies
2
Views
1K
Graduate Quantum entanglement hinting at the nature of reality?
  • · Replies 13 ·
Replies
13
Views
3K
Graduate Quantum Mechanics and Classical Mechanics: Is there a connection?
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Question about the uncertainty principle and unit cell in phase space
  • · Replies 1 ·
Replies
1
Views
3K
Graduate Just a quick question about the double slit experiment.
  • · Replies 3 ·
Replies
3
Views
2K
Graduate What Is the Doppler Effect in Matter Waves?
  • · Replies 6 ·
Replies
6
Views
3K
Graduate Two atoms at opposite sides of the universe are connected?
  • · Replies 11 ·
Replies
11
Views
8K
Graduate Question regarding sudden approximation
  • · Replies 1 ·
Replies
1
Views
4K
Graduate Understanding Physics Through Randomness: A Curious Adult
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Problem with Parity for photons
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Difference wave mch. and field operators.
  • · Replies 5 ·
Replies
5
Views
3K
Graduate Physically, what do positive frequency modes represent?
  • · Replies 2 ·
Replies
2
Views
3K
Graduate Is the expectation value of momentum of a stationary state zero?
  • · Replies 9 ·
Replies
9
Views
21K
Graduate Understanding the Probability of Measuring an Allowed Energy in a Wave Function
  • · Replies 6 ·
Replies
6
Views
3K
Undergrad Heisenberg's uncertainity principle
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Understanding the Vector Spaces in Berry's Geometrical Phase Paper
  • · Replies 31 ·
2
Replies
31
Views
4K
Graduate Square of a finite deltafunction
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Clarification of statement on how to evaluate S-matrix elements.
  • · Replies 5 ·
Replies
5
Views
3K
Graduate Solving the Mystery of Light Pressure | Physics Forum
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Understanding the 1D Wave Equation for Free Particles in Quantum Mechanics
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Elementary Particles: Mass, Force & Matter
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Could a Fermion be Entangled with a Boson ?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate How do I treat IR divergences in e+/e- to mu+/mu- scattering?
  • · Replies 1 ·
Replies
1
Views
3K