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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

Is the quantum wave function a real object or a mathematical tool?
Graduate Why is Quantum Field Theory Local?
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Undergrad Why the linear combination of eigenfunctions is not a solution of the TISE
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Undergrad Atom-photon interactions in the interaction picture (self answered)
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Undergrad Feynman diagram for scalar - vector interaction
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Undergrad Bell's theorem claimed to be refuted - paper published by EPL
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Undergrad Confused about the spectrum of an observable
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Undergrad Probability of finding a particle outside its light cone
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Undergrad What is meant here by "quantum mechanics–free subsystem"?
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Undergrad What part of physics describes what happens just outside of an electron?
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Graduate How Does the Anomalous Doppler Effect Work?
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Graduate Justification for phi^4 potential
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High School Quantify Quantum Eraser Experiment
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High School Some questions about Wheeler's delayed choice experiment
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Undergrad Question about No-Cloning Theorem and State Tomography
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High School Understanding the Observer in Quantum Mechanics: Debunking Common Misconceptions
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Graduate $S^+$ and $S^{-}$ operators formula
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Graduate What is the meaning of "excess" Goldstone bosons?
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Graduate Heisenberg equation of motion -- Partial derivative question
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Undergrad Can an electron in a magnetic field radiate a virtual photon?
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Graduate Calculating nonequilibrium Green's Functions
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Undergrad A video about the delayed choice eraser that I made
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Undergrad Distribution of charges as a result of the Hall Effect
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Undergrad Some questions in "Introduction to quantum mechanics"
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Undergrad Black body radiation -- Some basic questions to aid my understanding
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Undergrad Should I always be careful about dimensional consistency?
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High School Description of isolated macroscopic systems in quantum mechanics
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Undergrad Are Expectation Values Measured for Coupled Photons from SPDC?
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Undergrad Good resources for learning a little about the wave vector
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Graduate Introduction to topological field theory?
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Graduate Second Quantization in QFT
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High School What percent of everyday-life electrons are collapsed?
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Undergrad Applying Heisenberg picture to density operator
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Undergrad Mixed states from entangled state
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Undergrad Quantum entanglement. -- Spin up, spin down, isn't it the same?
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High School Electron angular momentum, gyroscope?
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Undergrad Quantum Negativity & 4-Partite Entanglement of GHZ State
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Undergrad Question about particle interactions and the forces between them
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High School Is a black hole a massive ball of photons?
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Undergrad How Does Negative Pressure Influence the Expansion of the Universe?
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High School View double slit from other end
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High School "Test of wave function collapse suggests gravity is not the answer"
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High School Does the Higgs Boson really have 0 spin?
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High School Are electronic transitions a result of a single photon?
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Undergrad Why Does Spin Down Have Lower Energy Than Spin Up in a Magnetic Field?
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Undergrad Are Different Charged Gluons Repulsive in the Gluon-Gluon Four-Point Vertex?
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Undergrad Problem with Commutator of Gauge Covariant Derivatives?
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Undergrad How is Coulomb's Law compatible with quantum physics?
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Graduate What is the true energy required to excite an atomic electron?
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Undergrad Optical spectrum analyzer related
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Graduate Why is 4-Momentum Conserved in Quantum Field Theory?
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Undergrad Is London depth in superconductors analogous to skin depth?
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High School Question about quantum entanglement
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Undergrad How Does Spin-Orbit Coupling Affect Quantum Number Validity?
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High School Sun powered by quantum tunneling - question
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Undergrad Exceptions to the postulate of equal a priori probabilities?
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High School Reduced Planck Constant vs Dark Matter?
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Undergrad Time-dependence in the Hamiltonian
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High School Turbulence and Quantum Mechanical Probabilities
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Undergrad Stimulated emission in harmonic oscillator
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Undergrad Could Light Absorption Be Linked to Quantum Tunneling?
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Undergrad Derivation of Eigenfunctions/Eigenvalues of the Momentum Operator
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Undergrad Double delta potential -- Degeneracy of bound states in one dimension?
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Undergrad Do I understand Bell's Inequality Test correctly?
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Undergrad Do Entangled Quantum Particles Remain Aligned After Initial Preparation?
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Undergrad Riddle: Where is Epsilon in Bohr Model of Atom?
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Undergrad Simulation of non-Hermitian quantum mechanics
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High School Energy needed for electron's change in energy level in an atom
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High School Understanding Light Quantization
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Undergrad Interesting Scientific American article (The end of QM?)
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High School Which one is correct? (the Matrix or Wave formulation of QM)
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Undergrad How to solve 2nd order TDSE for a Gaussian-kicked harmonic oscillator?
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Graduate Quantum Chaos: Expert Discussion and Q&A
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Undergrad What is the significance of the dispersion relation?
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Undergrad Normalization of an Eigenvector in a Matrix
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High School Spin collapse in a magnetic field
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Undergrad Free electron path without a nearby proton
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Undergrad What does it mean for spins to be anti-phase with each other?
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Undergrad Can a quantum system with internal memory be in an energy eigenstate?
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High School Understanding the Interactions of Energy with Quantum Particles and Strings
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Graduate Renormalizability conditions for a real scalar field in d dimensions
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Undergrad "Filming" a quantum measurement
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Graduate Dimension of \lambda constant in \delta potential
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Undergrad An Alternative form of Bell's Inequality
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Undergrad How does a particle's acceleration relate to the emitted photon?
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High School Wave Function Collapse using faulty recording devices.
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Undergrad Is the change in energy due to light-shift the same in all levels?
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Undergrad Question on circular polarization and the quantum eraser
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Undergrad Understanding Measurement Probability in Electron Spin: Explained by Susskind
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Undergrad Calc QED Charge Particle Repulsion/Attraction
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Undergrad Are entangled particles really separated?
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Undergrad Question on Harmonic Oscillator Series Derivation
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High School Traveling wave solution notation
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Undergrad Quantum Tunneling in an STM: ELI5 Requested
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Undergrad Spontaneous parametric down-conversion entanglement using BBO
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High School Are photons entangled with a component of the atom that emitted them?
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High School Quantum info and its indestructability
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High School Understanding Circumflex Operators: Get Help Now
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Undergrad Relation between blackbody radiation and spontaneous emission
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Undergrad Constructive Interference of Light
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Undergrad Do Interacting Bosons with Spin 2 Exist for Gluon-like Charges?
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