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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 On computing quantum waves exactly from classical action
Graduate How to operate on product state?
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Graduate How Does Anti-Commutativity Affect Grassmann Number Integration?
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Graduate Is the Multi-Electron Wavefunction Truly Separable?
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Graduate Density Matrix in that DFT bible book
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Graduate Did the Quantum Field Exist at the Beginning of Time and Space?
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Graduate Meaning of Expectation Values for <x^2> and <p^2> in Classical Mechanics
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Graduate Practical examples of superposition?
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Graduate Stationary schrodinger equation (basic problems regarding the basis being used)
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Graduate What Is the Root of Number Operator in Quantum Mechanics?
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Graduate Second quantization and partial traces
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High School What is the difference between quantum mechanics and quantum physics?
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Graduate Schrodinger Equations - wave propagation
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Undergrad Why Does Quantum Mechanics Depend on Probability?
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Graduate Formulation of Quantum Mechanics?
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Graduate Tunneling effect in Supercapacitors ?
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Graduate Can Quantum Mechanics Enlighten My Philosophical Ideas?
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Graduate Systems with global phase invariance, 3D string?
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Graduate Understanding Inelastic Collisions in Helium at Room Temperature
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Graduate Studying the Zeeman Effect on Molecules
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Graduate What is the paradox in Planck's Law?
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Undergrad Encryption v.s. quantum computers
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Undergrad Why is gold's color different from other metals?
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Graduate SU(2) Spinor: Is Product of Two Scalar-Type Entity?
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Graduate Why would entangled particles light years away need to be able to cancel?
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Graduate Solving Infinite Square Well: Eigen Functions &amp; Solutions
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Graduate The smallest measurement device
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Undergrad Fourier transform and uncertainity principle
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Graduate Colliding Photons: Matter-Energy Problems & Wavefunction
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Graduate Quantum-classical correspondence?
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Graduate Harmonic Oscillator energy = WKB approximate energy why?
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Graduate Solving KET-BRA Notation in OPW Solid State Physics
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Graduate Why do molecules not fall apart under observation?
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Graduate Why do high energies correspond to small distances
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Undergrad Does the Casimir Effect Occur in Space?
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Graduate QFT: Gauge Invariance, Ghosts, Symmetry & Lorentz Invariance
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Graduate Question about Braket notation
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Graduate The Impact of Weak Realism on Bell's Theorem and Bohmian Interpretations
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Graduate Time Dependent Schrodinger Equation -> T(t) solution
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Graduate Introductory books on quantum mechanics
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Graduate Dirac's Coupling to an electromagnetic field and schroedingers
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Graduate Dot product of two pauli matrices
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Graduate Why Do Photons Follow a Sine Wave Pattern Instead of Other Paths?
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Graduate U(1):?:SU(3) 1D:2D:3D harmonic oscillator.
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Graduate 3-d harmonic oscillator and SU(3) - how to imagine it?
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Graduate Energy Conservation in an expanded 1D box
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Graduate Does quantum mechanical definition of momentum require movement ?
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Graduate Copenhagen interpretation of Quantum Theory
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Graduate Hydrogen spectrum hyperfine structure
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Graduate Classical counterpart of the quantum |nlm> states
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Graduate What Causes the Expansion of Our Universe?
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Graduate Choice of source photon production in entanglement experiments
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Graduate Does the Hartree Approximation Ignore Electron Interactions?
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Graduate Explaining quantum coherence to a layman
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Graduate Velocity, density, ect. : air : molecules spinor field :?:?
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Graduate What exactly is an oscillator in quantum physical context?
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Graduate Has entanglement in quantum physics been experimentally validated?
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Graduate Question about spacetime quantization
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Graduate Elementary Particles with Zero Spin?
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High School Drawbacks of bohr's model of atom
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Graduate How do you transition from the QED Lagrangian to classical electrodynamics?
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Graduate Why No Decoherence in Double Slit Experiment?
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Undergrad Explaining Hydrogen Atom's Line Spectra: The Rutherford Atomic Model
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Graduate QCD \Lambda Parameter: Definition & Its Role in Non-Perturbative QCD
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High School Need Help Remembering An Equation
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Graduate Wave propagation, +z or -z
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Undergrad Quick Uncertainty in an Average Question
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Graduate EM Field strength and plane waves
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Graduate Partition Function: Energy States & Force Constants
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Graduate Heisenberg uncertainty - uncertainty about its meaning
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High School What does it mean that two particles have opposite spins?
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Graduate Laser question (Confinement factor and quantum well thickness)
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Graduate Particles with Spin 1/2: Unraveling the Mystery
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Graduate Von Neumann machine for the Universe
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Graduate Uncertainty with Hesienberg’s Uncertainty
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Graduate SF-Mott insulator transition and Wigner-mermin theorem
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Graduate Where Was the Observer Detector in the Double-Slit Experiments?
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Graduate Do virtual photons Doppler-shift?
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Graduate How do I find the time evolution of a state with an operator in the Hamiltonian?
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Undergrad Why is Fourier Integral Meaningless for f(x)=A*cos(ax)?
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Graduate Observation and Gravity: The Double Slit Experiment with Electrons Explained
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Graduate Superposition/electron energy levels
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Graduate What Are the NMR Operators I_x, I_y, and I_z?
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Graduate Helium Energy Level Diagram Analysis w/ Bohr Theory
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Graduate Solving Perplexing Commutator for Simplification
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Graduate What Is a Noncommutative Integral and How Does It Impact Quantum Field Theory?
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Graduate Why Does the HUP Spectrum Favor Particles Over Flows?
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Graduate Matter + Antimatter Bound State Mathematics
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Graduate Why Are IR and UV Divergences the Same?
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Graduate Quantum Entanglement: Beginner's Guide to Distances & Discovery
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Graduate Inverse spectral problem in QM
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Graduate Switching to a Matrix Hamiltonian - Conceptual Issues
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Undergrad Fair dice and two slit experiment
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Undergrad Creating : one frame at a time
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High School How Did Galileo's Experiment Measure the Speed of Light?
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Graduate Tunneling effect by means of the instantons
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Graduate Degenerate basis, incomplete set of operators
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Graduate Could Our Universe Be Just a Brane in a Much Larger Reality?
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Graduate Can fractals help solve the mystery of the universe's unified theory?
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Graduate Let us assume Feynman was wrong.
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Graduate Understanding the Bloch Sphere Representation for Quantum States
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