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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

Graduate Understanding Barandes' microscopic theory of causality
Undergrad Why Does Quantum Entanglement Seem Puzzling Compared to Everyday Correlations?
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High School Is there any practical proof that quantum entanglement really works?
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High School Quantum mechanical one-liners?
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High School I have question regarding quantum physics (localizing an electron)
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High School How do particles get their spin?
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High School Idle Photons (motionless relative to the Earth's surface?)
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Undergrad Understanding Light Polarization: An Intuitive Explanation
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Undergrad Lifetime and Linewidth: Solving the 2π Factor
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High School Why can gravity escape from a black hole?
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High School So this is a bit of a duplicate: Is the universe fully transparent to gravitons?
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Graduate Spin networks with different intertwiners
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Undergrad Al26 Meta Stable State: Forbidden Xray Transition?
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Undergrad Understanding Entanglement and Born's Rule in Photon Polarization Experiments
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High School What are Feynman Diagrams and how do they help explain Quantum Electrodynamics?
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Undergrad Feynman diagrams and sum over paths
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Undergrad Is elastic scattering of electrons by a solid possible?
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Undergrad How Can Laser Light Mixing Reveal Quantum Entanglement?
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Undergrad Error of the WKB approximation
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Undergrad What causes qubit superpositions to form?
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High School Why doesn't the detector affect the result?
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Undergrad The pattern of one photon at a time passing through large-distance setups?
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Undergrad Double-slit experiment, determining which slit an electron passed thru
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Graduate Changing Hamiltonian with some eigenvalues constant
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Undergrad How is an interference pattern changed by an external field?
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Graduate The Probability Distribution of a Bosonic Field when Emitted
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Undergrad Other ways of finding expectation value of momentum
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Undergrad Looking For Explanation of New Interferometer Article
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Undergrad Is the magnetic moment of a hydrogen atom not equal to Bohr's magneton?
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Undergrad Question on bra vs ket notation
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High School Tachyons and imaginary numbers?
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High School Tensor product of operators and ladder operators
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Undergrad Why are Planck units considered fundamental?
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Undergrad Double-slit experiment with momentum entangled pair of photons
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Undergrad Speed of individual photons in a vacuum?
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Undergrad Measurement accuracy or variation
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Undergrad How does a process of a Raman transition break quantum entanglement?
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Undergrad What is this notation D|(n;n')|, and how to solve it?
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Undergrad Spin expectation value for one particle vs actual measurement
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High School How is energy transferred from a wave to a photon?
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Undergrad About photon-polariser interaction quantum-molecular-level mechanics
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Undergrad Curious about an idea of a modified polariser to send signals with QE
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Undergrad Weinberg Lectures in QM (2013 Ed.), Equation 7.10.15
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Undergrad Quantum mechanics stationary state
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Undergrad Negative energy when a laser goes through lithium niobate crystal?
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Undergrad Density Operators of Pure States
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Undergrad Time-energy uncertainty relation
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Undergrad Can I find a particle in two states simultaneously?
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Undergrad Analytical proof of LASER production
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Undergrad New Nobel Aspect contradicts himself on action at a distance bel
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Undergrad Predetermination in quantum theory and information theory
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Undergrad In Bell's Theorem, communication
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High School Will Quantum Entanglement Lead to a 2022 Nobel Prize in Physics?
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Graduate Many-Particle Wavefunction Question
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Undergrad Energy from quantum systems in an expanding universe?
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Graduate Concept of wavefunction and particle within Quantum Field Theory
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Undergrad Postive rays in cathode ray tube experiments?
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Graduate Why is this C-G coefficient always zero?
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Undergrad Wave packet experimental detection
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Graduate Does there exist a proof for these conjectures?
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High School What’s the necessity of the strong force?
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Undergrad About normalization of periodic wave function
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High School Is there another workable interpretation of the Bell Inequality?
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Undergrad How can gravitons have anti particles?
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Undergrad Why does the QFT Lagrangian not already use operators?
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Undergrad Is Planck's Law of Black-Body Accurate?
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Undergrad What sense does it make to "weigh" a Casimir cavity?
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Undergrad Einstein summation convention in QM
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Undergrad Has the Unruh Effect ever been observed?
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Undergrad Quantum events near a black hole
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Undergrad How Do Radio Antennas Function in Quantum Mechanics?
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Undergrad Time-dependent to time-independent Schrödinger equation
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Graduate What is a "transient" value in the Ising model?
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High School About infinity and all possibilities of Multiverse/Omniverse
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Undergrad Haag's Theorem: Explain Free Field Nature
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Undergrad Understanding Planck's Quantum of Action for Beginners
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MHB Matrices Often Used in Quantum Computing
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Undergrad The CMB has a thermal black body spectrum
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Undergrad Polarization of photons quantum mechanically
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High School Understanding Waves, Particles and Probabilities
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Undergrad Does chaos amplify inherent quantum level randomness?
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Undergrad Experimenting with Spinor Rotations & Sign Changes
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Undergrad Operators in finite dimension Hilbert space
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Graduate What are the basic mathematical objects in QFT?
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Undergrad How does one compute the Fourier-Transform of the Dirac-Hamiltonian?
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MHB Different Kinds of Quantum Computing Measurement Operators
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Undergrad Understanding No Energy Degeneracy in Sakurai's Quantum Mechanics
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Graduate Realizing EIT with Pulsed Laser: Intensity, Duration & Frequency
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Undergrad Where does the QM creation operator get its energy?
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Undergrad Inner product - positive or positive semidefinite?
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Undergrad The Wavefunction when Mass is Much Greater than Planck's Constant
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Undergrad Wondering why quantum entanglement occurs
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MHB Quantum Computing: Positive Operators are Hermitian
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Undergrad Why is the SE better than the KG equation for a hydrogen atom?
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High School Heisenberg's Uncertainty Principle and determinism
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High School Sinusoidal wave function of t and x
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Undergrad Vector operator acting on a ket gives a ket out of the state space
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High School Positive Definite Cartan Matrices in Quantum Physics
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Undergrad Bell's circuit beginner's question: Sampling alters, - what's normal?
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Undergrad What is so compelling in the superposition theorem?
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Undergrad Inner and Outer Product of the Wavefunctions
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