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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)
Graduate Propagator from a space-time point to itself
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Undergrad Quantum numbers for energy levels
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High School How Do Active and Passive Transformations Differ in Quantum Mechanics?
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Undergrad Entanglement and Regions of Space in Vacuum
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Undergrad Verifying Speed of Light Varies by Direction
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Undergrad Heisenberg Microscope: Exploring Single Photon Diffraction
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Undergrad Where do wave functions come from?
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Graduate Scattering Amplitudes for Phi 4 Theory
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Undergrad Gauge theory symmetry breaking in L&B
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Undergrad Are quantum computers required to be cold to reduce Brownian motion?
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Graduate How can we measure these Hermitian operators?
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Undergrad Eigenfunctions and wave functions
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High School Is a Quantum Entanglement Camera the Key to Seeing Into the Future of Earth?
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High School Cold vs hot on the atomic scale
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Undergrad Is the Heisenberg-Robertson Uncertainty Relation Always Consistent?
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Undergrad Is Probability in Quantum States Proportional to Energy Levels?
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High School Dual slit with controlled electron trajectories
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Undergrad Zeno's paradoxes of motion in physics
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Undergrad Information diagram for entangled particles?
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Undergrad Second Matrices from Spherical Harmonics with Eigenvalue l+1
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Undergrad Pros and cons of Heisenberg and Schrodinger (and Feynman) pictures?
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Undergrad Could an experiment confirm the EPR paradox's implications on uncertainty?
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Using the QM Formalism To Make Predictions
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Undergrad Why QFT still goes well while it lacks the notion of wave function?
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High School Question about energy needed by electron to change energy levels
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High School Can it escape the event horizon if the wavelength is long enough?
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Graduate Upper bound for wavelength of a photon inside an infinite square well
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High School 1-photon emission possible from electron-positron annihilation?
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Undergrad Solving 1D Scattering Problem: Reflection & Transmission Coefficients
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Graduate Would it matter which inner product I choose in quantum mechanics?
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Undergrad Is the measurement problem equally as vexing as entanglement?
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Undergrad Born rule in classical Ising model: Feynman -> Boltzmann ensemble?
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Undergrad Quantum Mechanics Wave Function in 3D
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Is this a valid derivation of the Uncertainty Principle?
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Undergrad Solution Expansion of ##A^{\mu}## when ##L \rightarrow \infty##
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Undergrad Consequences when a measurement is destroyed?
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Insights Causal Perturbation Theory - Comments
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Undergrad Can Dynamical Systems Explain Electron Behavior in Hydrogen Atoms?
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Undergrad Is Stern-Gerlach experiment a proper idealization of measurnment?
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High School 2D-cross-double-slit experiments for understanding quantum world
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Undergrad Where does this solid angle come from?
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Graduate Why does equation 35.21 have an extra minus sign?
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Undergrad Momentum operator acting to the left
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What should be the mathematical way out of QFT's decades stagnation?
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Undergrad Why quantum wave function collapse is not consider a signal?
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High School What causes loss of quantum coherence?
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Graduate Can Entropy of Two-Level Particles Predict Fringe Visibility?
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Graduate Where did this term in the path integral come from?
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High School Actions of subatomic particles while under observation
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Undergrad Complex Conjugate of Wave Function
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Undergrad 2-photon interference question
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High School Could Quantum Fluctuations exist W/out the presence of Spacetime?
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Undergrad Q re a photon ionizing a hydrogen atom
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Undergrad Quantum Measurements with Gravitational Waves
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High School Regarding the coherence of a photon pair decaying from Higgs
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Graduate Spin-orbital combination and the exclusion principle
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Graduate Effective Action for Scalar and Fermion Fields
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Undergrad Understanding Matrix Mechanics in Quantum Mechanics
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High School Can a Thought Experiment with Dice Challenge Bell Inequalities?
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Undergrad Why can't we interprete /x> in relativistic QFT as position eigenfunc?
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High School How long before someone builds a machine to predict the future?
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Undergrad Understanding how to reduce density matrices
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Graduate Why does a photon have a defined frequency but is also somewhat localized?
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High School Clarification about Bohr's atomic model
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Undergrad Is this something like a Wick rotation?
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Undergrad What generates black-body photons?
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Undergrad Minimize grand potential functional for density matrix
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Undergrad Asking about Nuclear Magnetic Resonance
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Undergrad Is there a way to translate a particle's spin into regular motion?
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Graduate Softened potential well / potential step
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High School How does a wave collapse not violate the speed of light?
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High School Time Crystals & Spin: Engineering a New Reality?
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Graduate Is there a vibration energy term associated with mesons?
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Graduate Getting particle/antiparticle solutions from the Dirac Equation
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Undergrad Would Black Holes Be Coherent Under Quantum Mechanics?
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Finding the probability of making a measurement E1
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Undergrad Properties of a unitary matrix
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Graduate Is the "op" lattice ##\mathscr{L_H}^\perp## also atomistic....?
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Undergrad What is the effect of a magnetic field on an atom's magnetic moment?
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Undergrad The significance of the Dirac notation
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Undergrad Energy operator in Quantum Mechanics
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Undergrad Is quantum entanglement just like ordering Schrodinger's Slice pizza?
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Graduate Wolfram Schommers Projection theory
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Graduate Matrices from Spherical Harmonics with Eigenvalue l+1
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Undergrad What does an uncertainity of 0 mean?
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Graduate Suggested reading for quantum information applications in QFT
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Undergrad Extraction of a particular quantum state from a quantum circuit
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High School Are Spin Operators Along Opposite Cartesian Axes Compatible?
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High School Wave-Particle Duality Controlled by Single-Photon Self-Entanglement
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High School Does the energy 6.626x10^-34J have any special meaning?
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Graduate Representation of Z2 acting on wavefunctions
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Undergrad Wave function: vector or scalar?
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Undergrad Measurement of an entangled Particles in two Different Bases
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High School What is the pattern in a double slit experiment near the slits?
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Undergrad How to find the photon's path?
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High School Does an electron have kinetic energy when attached to a proton?
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High School What does the unit "Js" of the Planck constant mean?
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Graduate Heisenberg equations of Klein-Gordon Field in Space-Time
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Undergrad Does intrinsic (e.g., spin) imply elementary (irreducible)?
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High School Basic Question: What are energy levels, of photons, for example?
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