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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 Valid local explanation of Bell violations? (Pegg et al., 1999; 2008)
Undergrad Fermi's Golden Rule and the S-matrix
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Undergrad Could Planck-Einstein relation be applied to matter waves?
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Graduate Zero-point Energy Contribution Below the Planck energy cutoff
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Undergrad Understanding the Relationship Between Photon Spin and Polarization Vectors
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Undergrad Could Quantum Physics explain the singularity in a Black Hole?
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30-day Topological Quantum challenge
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High School Question about squares of operators
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Undergrad Quantum Spin: Is it Random? Alice & Bob's Test
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Undergrad Photon Interaction with Environment at Long Range
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Undergrad Obtaining the Dirac function from field operator commutation
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High School Is Inverse Compton Scattering Related to the Doppler Effect?
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Undergrad Can atoms absorb photons with energy higher than transition energy?
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Graduate Could the fields for the particles and forces have the same origin?
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Undergrad QFT - Field operator commutation
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Undergrad Physical meaning of the highest root / weight
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Undergrad Interference of a fat laser beam: Tilting wave peaks
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Graduate Quantum Mechanic/wave function/junction condition
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Undergrad Single photon double slit experiment
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Insights Massive Meets Massless: Compton Scattering Revisited
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Undergrad Perturbation Theory and Zeeman Splitting
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Undergrad Visualising an alternative formulation of Planck's Radiation Law
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Graduate Exclusion principle in Helium 3
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High School Mapping between rules of classical vs QM probability?
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Undergrad Single Photon Double Slit Experiment
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Undergrad Quantum Computing: How are quantum properties exploited?
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Graduate Quantum Field Theory: 3-4 Equation Steps Explained
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Quantum physics and the theory of evolution
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Graduate Phonons as a quasiparticles in a quantum LHO
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Undergrad Why is the term "fluctuations" objectionable?
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Fluctuation in terms of Hilbert space formalsm
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Undergrad Where did I go wrong in deriving quantized energy?
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Undergrad Quantum Entanglement: What I Know
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Undergrad Parametric down-conversion and double-slits
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Undergrad Negative Energy -- Are QI/QEI's Real?
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Undergrad Lithium Atom Ground State Radial Wavefunction
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Undergrad Is Chemistry the same everywhere?
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High School How much math is required to do QM?
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Understanding the Math behind meson decay computations
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Graduate Why do different regularization schemes give different answers?
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High School How can the annihilation operator for photons be realized experimentally?
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Undergrad Is it possible to explain Quantum tunneling with the HUP?
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Graduate Why Is the Path Integral W[J] a Vacuum-to-Vacuum Amplitude?
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Undergrad Unveiling the Math Behind Potential Well Boundaries
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Undergrad Number of qubits required for Shor's algorithm to factor a number < 2^n
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Undergrad Thermal photons emission inside a material
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Undergrad Vertex function, quantum action
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Undergrad Finding matrices of perturbation using creation/annihilation operators
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High School Calculating Photon Polarization States with PBS & Wave Plates
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Graduate Bremsstrahlung single photon or spectrum
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Undergrad Accuracy of the Density of States
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Graduate Coherent states: Orthonormal set? Overcomplete basis?
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High School Ionization energy and energy levels
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Undergrad Group Theory Appearing in Griffith's Elementary Particles (2nd Ed.)
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Graduate How ‘spooky’ is quantum physics? The answer could be incalculable
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Undergrad Why perturbation theory uses power series?
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Undergrad Splitting of a one-particle wave function
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Graduate Why is the quantum Fisher information useful in quantum metrology?
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High School What's the exact point about time travel?
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Undergrad (Baby QM) Analytic Solution to the Infinite Square Well Problem
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Graduate Decoupled spin vectors A and B
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Graduate How are basis vector relationships defined in incompatible propositions?
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Undergrad Nomenclature : global or constant phase
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Undergrad Fermi's golden rule derivation a bit hazy
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High School Quantum computing -- How is the relevant solution selected?
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Graduate Does Adding or Removing an Electron Change a Helium-3 Atom to a Boson?
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Graduate Product of Representations of Lorentz Group
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Graduate Superluminal origin of Quantum Mechanics
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Undergrad Thought experiment on photon entanglement
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Undergrad Vacuum amplitudes in \phi^4 theory
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Undergrad Clarification on a statement about spin 1/2 z component related to x and y
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Undergrad Commutator with gradient operator (nabla)
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Graduate Algebraic form of Klein Gordon ##\phi^4## vacuum and ladder operators
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Undergrad Creation/annihilation operators question
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Undergrad Explaining Time Crystals: Matter, Mass & 4D
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Undergrad Quantum Mechanics Particle in a Box
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Graduate Looking Under the Hood of Feynman Diagrams
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Graduate Potential step at a Barrier in Quantum mechanics
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High School Are all quantum fields coherent?
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Graduate Can Bloch Waves Reveal Periodic Potentials in Quantum Mechanics?
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Undergrad Virtual particle content of the vacuum state....
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Undergrad Is the Kronecker Delta Calculation in Peskin and Schroeder's Solution Correct?
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Undergrad Quantum Measurement under Heisenberg Picture?
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Graduate Ground state energy of cube-like potential wells
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Undergrad 'Off-shell' particle in an external field....
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Graduate Validity of Scalar Field Lagrangian with Linear and Quadratic Terms
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Graduate QFT topics for entanglement entropy
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Undergrad Frank Wilczek on Virtual Particles and Summing diagrams....
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Undergrad The Dirac Equation: Understanding Spinors and Approximations
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Undergrad Perturbation lines for the 1s hydrogen electron
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Undergrad Time measurement in a double slit experiment with single photons
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High School From radio signal to corresponding photons
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Graduate How to build a qubit (theoretically)?
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Undergrad What is the Fourier conjugate of spin?
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Understanding Superposition Physically and Mathematically
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Undergrad Atoms in a harmonic oscillator and number states
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Graduate Quantum entanglement and quantum foundation
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High School Questions about measurement devices in the double slit experiment
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Undergrad 2nd Order Perturbation Theory Energy Correction
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Graduate Commutation between spin-operator and creation operator(QFT)
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Graduate Quantum Information research frontier
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