Quantum Physics Forum

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.

Threads

Graduate Quantum Information Theory: Trace of Density Matrix Explained

  • aaaa202
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Graduate Prove the nth Hermite polynomial has n real zeros

  • Happiness
  • · Replies 1 ·
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Graduate Decoherence in the long time limit of density matrix element

  • soviet1100
  • · Replies 5 ·
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Graduate Relationship between Quantum Numbers and Quantum Information

  • kalimaa
  • · Replies 5 ·
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Graduate Explaining John Bell & Anton Zeilinger's Attempt to Prove No Definite Reality

  • thinkandmull
  • · Replies 22 ·
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Graduate How Do You Construct Excited States in a Two-Boson Harmonic Oscillator?

  • kuy
  • · Replies 8 ·
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Graduate Is there a Bell type inequality involving only three values?

  • Zafa Pi
  • · Replies 11 ·
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Graduate Trace Distance in quantum mechanics

  • Emil_M
  • · Replies 1 ·
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Graduate Are photons really anti-correlated off their basis vectors?

  • zincshow
  • · Replies 2 ·
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Insights A Hand-Wavy Discussion of the Planck Length - Comments

  • klotza
  • · Replies 28 ·
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Graduate Realism and counterfactual definiteness in Bell's theorem

  • ShayanJ
  • · Replies 10 ·
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Graduate The spectral gap and it's decidability

  • #neutrino
  • · Replies 1 ·
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Graduate Question related to a 3D finite spherical well

  • ClaireBear1596
  • · Replies 2 ·
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Graduate Why is Quantum Mechanics Inherently Probabilistic?

  • AlexGLSY
  • · Replies 5 ·
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Graduate Why does gauge fixing break gauge symmetry?

  • TimeRip496
  • · Replies 3 ·
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Graduate Distance between positron and electron

  • Einstein's Cat
  • · Replies 5 ·
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Graduate What is the relationship between frequency and energy in matter waves?

  • VHAHAHA
  • · Replies 7 ·
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Undergrad Parallel universes and randomness

  • HydroTekZ
  • · Replies 1 ·
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Graduate Wave-function solution of a rectangular-well potential

  • Happiness
  • · Replies 4 ·
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Graduate Ground-state energy of harmonic oscillator(operator method)

  • explainplease
  • · Replies 9 ·
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Graduate Quantum effects caused by our mathematics?

  • ande4jo
  • · Replies 28 ·
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Graduate Collapse of Wave: Effects on Energy & Position Measurements

  • klw289
  • · Replies 70 ·
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Graduate What Experiments Can Enhance Your Understanding of Quantum Mechanics?

  • TomServo
  • · Replies 1 ·
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Graduate How can pure EM waves experience decoherence?

  • jlcd
  • · Replies 11 ·
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Graduate Counting States of Degeneracy in 3-D Particles in a Box

  • Sturk200
  • · Replies 1 ·
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Graduate Is Fokker Planck equation equivalent to Schrodinger equation

  • naima
  • · Replies 1 ·
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Graduate Is the Spectral Gap Problem in Quantum Mechanics Undecidable?

  • andresB
  • · Replies 1 ·
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Graduate Experiment showing energy levels of light are quantized

  • conquest
  • · Replies 6 ·
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Undergrad Must even functions have even number of nodes?

  • Happiness
  • · Replies 21 ·
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Graduate Can Numerical Simulations Reveal Violations of CHSH Inequalities?

  • jk22
  • · Replies 19 ·
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Graduate Isn't Schrodinger's cat doomed anyways?

  • Bharath Siva
  • · Replies 5 ·
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Graduate Learning Feynman Diagrams: Matrices & Dirac Adjoints

  • Immortalis
  • · Replies 4 ·
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Graduate Why Do Some Particles Decay Faster Than Others?

  • Ryan Reed
  • · Replies 6 ·
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Undergrad What is the explanation for quantum correlations?

  • bremsstrahlung
  • · Replies 23 ·
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Graduate Are Some Atomic Orbitals From a 4D Wave Function?

  • Hornbein
  • · Replies 3 ·
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Graduate Electromagnetic waves and the correspondence principle

  • center o bass
  • · Replies 4 ·
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Graduate QED & Thin Films: Wave Interference or Probability?

  • Jimmy87
  • · Replies 9 ·
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Graduate How does the wavefunction "know" the observables?

  • Coherence
  • · Replies 12 ·
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Graduate Perceived contradiction in non-locality principle

  • entropy1
  • · Replies 61 ·
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Graduate Why is the transition in resistance gradual at the Critical Temperature

  • thanasis
  • · Replies 4 ·
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Graduate Possible explanation for a Bell experiment?

  • PR0
  • · Replies 21 ·
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Graduate 100% transmission through a potential barrier

  • Happiness
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Graduate What are some coincidences in quantum mechanics that make life possible?

  • tzimie
  • · Replies 12 ·
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Graduate What determines light-matter interaction processes?

  • carllacan
  • · Replies 3 ·
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Graduate Is the collapse of a wave function deterministic or random?

  • Happiness
  • · Replies 30 ·
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Graduate QED explanation of entanglement

  • zonde
  • · Replies 13 ·
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Graduate How to get from the wavefunction to weighted states?

  • Jarrodmccarthy
  • · Replies 1 ·
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Graduate What prior experiments justified the notion of entanglement?

  • ontodva
  • · Replies 7 ·
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Graduate Do Electrons need Energy to Excite the EM field?

  • Ryan Reed
  • · Replies 3 ·
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Graduate Free particle propagation: paradox?

  • Kostik
  • · Replies 5 ·
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Graduate Debunking Misconceptions About QCD: Understanding the Behavior of Quarks

  • BiGyElLoWhAt
  • · Replies 17 ·
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Graduate Unitary and linear operator in quantum mechanics

  • spaghetti3451
  • · Replies 3 ·
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Undergrad What exactly does quantum entanglement imply?

  • Daniel K
  • · Replies 78 ·
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Graduate Must the 1st derivative of phi be undetermined at V=infinity

  • Happiness
  • · Replies 4 ·
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Graduate Commutation relations for angular momentum operator

  • spaghetti3451
  • · Replies 7 ·
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Graduate What is the difference between psi(x;y) and psi(x) in 2D BO

  • sztld123
  • · Replies 1 ·
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Graduate Can synchronization emulate non-locality ?

  • Mentz114
  • · Replies 11 ·
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Graduate Anderson localization and electron flow/diffusion?

  • jarekduda
  • · Replies 1 ·
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Graduate Eberhard assumptions and FTL communication

  • zonde
  • · Replies 4 ·
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Graduate Bell-state entanglement swapping and retrocausality

  • entropy1
  • · Replies 24 ·
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Graduate Schwarz-Hora Effect: Publications & Discussions

  • HeinrichHora
  • · Replies 1 ·
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Graduate Double-slit with semi-transparence

  • Pizza
  • · Replies 6 ·
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Graduate Are photons passing a polarization filter randomly?

  • entropy1
  • · Replies 7 ·
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Graduate Connection between Planck's Constant and Action?

  • Mercy
  • · Replies 11 ·
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Graduate Quantum Cosmology and Quantum Computing

  • Alexis1304
  • · Replies 6 ·
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Graduate Retrieving information from qubits

  • T S Bailey
  • · Replies 4 ·
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Graduate Stern-Gerlach: Run Through X, Y & Z Axes?

  • Hornbein
  • · Replies 1 ·
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Graduate Hyperfine structure in hydrogen

  • victorvmotti
  • · Replies 1 ·
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High School Proof Photons Exist? Evidence & Facts

  • entropy1
  • · Replies 8 ·
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Graduate Double-slit with half-transparent mirror

  • jk22
  • · Replies 11 ·
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Graduate Do Electrons Excite the EMF or do the Virtual Photons?

  • Ryan Reed
  • · Replies 1 ·
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Graduate CPT transformation analogue of free electron laser?

  • jarekduda
  • · Replies 2 ·
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Graduate Seeking a phase angle operator for the QHO

  • snoopies622
  • · Replies 3 ·
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Graduate Are the two paths in an interferometer indistinguishable?

  • Happiness
  • · Replies 1 ·
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Graduate Wave function -- Why is there an imaginary part?

  • preitiey
  • · Replies 5 ·
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Graduate Pilot wave theory and quantum tunneling

  • johnob
  • · Replies 4 ·
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4

Undergrad Double Slit Experiment: Questions Raised & Explanations Needed

  • nnope
  • · Replies 49 ·
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Graduate Operator works on a quantum state yields another state?

  • Adel Makram
  • · Replies 9 ·
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Graduate How to interpret Bell's theorem correctly

  • entropy1
  • · Replies 2 ·
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High School Diffraction of light, the mechanism

  • Raymond Potvin
  • · Replies 19 ·
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Graduate Nonlinear susceptibility in second harmonic generation

  • Konte
  • · Replies 15 ·
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Graduate Hidden variables and Bell's inequality

  • Point Conception
  • · Replies 12 ·
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Graduate Double slit experiment exposed?

  • Nav
  • · Replies 22 ·
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Graduate Exact Description of Properties: Spin, etc.

  • abrogard
  • · Replies 3 ·
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Graduate Wave Functions: What Are They?

  • Negatratoron
  • · Replies 8 ·
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Graduate Correspondence principle and its use

  • janko78
  • · Replies 3 ·
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Graduate Uncertainty principle at the macroscopic level

  • preitiey
  • · Replies 8 ·
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Graduate How much does it cost to conduct quantum research on a large scale?

  • Mohamed Sabah
  • · Replies 16 ·
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Graduate Does Quantum Contextuality only apply to spin?

  • Jarrodmccarthy
  • · Replies 5 ·
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Graduate Indeterminacy of wave function

  • klw289
  • · Replies 5 ·
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Graduate Difference between 2-point and 4-point function in QFT

  • Higgsy
  • · Replies 3 ·
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Graduate Second Quantization vs Many-Particle QM

  • stevendaryl
  • · Replies 67 ·
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Graduate How Does the Stern-Gerlach Experiment Illuminate the Electron Spin Problem?

  • Sheldon Cooper
  • · Replies 6 ·
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Graduate How to find the normalization constant of Fermi-Dirac distribution function?

  • akk
  • · Replies 12 ·
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Graduate Do Quantum Particles Jump Rather Than Move?

  • cree_be_mee
  • · Replies 7 ·
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Graduate Can an Atom's Valence Electrons Be Used as a Radial Antenna?

  • SirR3D
  • · Replies 3 ·
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Graduate Using Feynman rules to calculate amplitude

  • Higgsy
  • · Replies 4 ·
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Graduate Free particle propagator - Shankar POQM Eqn. 5.1.10, p. 153

  • Kostik
  • · Replies 1 ·
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Graduate Order of scalar interaction impact Feynman diagrams

  • Higgsy
  • · Replies 1 ·
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Graduate Propagator for free particle: question about Shankar formula

  • Kostik
  • · Replies 1 ·
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