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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

A question about quantum entanglement
High School Collapse and unitary evolution
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High School What about if I apply HUP to myself?
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Undergrad Partial trace and the reduced density matrix
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Undergrad What is the probability of an electron emitting a photon?
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High School Can we all agree "consciousness" is not required to collapse wave function?
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Undergrad Direction of motion of particles with total spin under magnetic field
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High School How to evaluate whether a photon's polarization is in superposition?
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Undergrad Three Plus Anti-symmetric Particles
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High School Can an electron remain in an exited state forever with constant energy input?
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High School What happens when ethane absorbs UV light?
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Undergrad Shankar on constraints and free parameters for a particle in a box
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High School Why does anyone think gravity might collapse wave function?
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Undergrad Spinors and eigenspinors confusion
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Graduate Adiabatic theorem for a 3 level system
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High School Does the bomb experiment do a measurement?
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Undergrad How Do Quantum Numbers Influence Energy Levels in Atomic Systems?
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Undergrad Annoying detail in derivation of Compton scattering
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Undergrad Double-Slit Experiment: Does rate of photon emission matter?
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Undergrad Young's slit experiment with single photons
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Undergrad Are Planck's black body oscillators QHOs?
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High School Is there a resource that discusses wave collapse experiments?
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Graduate Gauge theory on a lattice: intertwiners, gauge potentials...
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High School The wave solution to the Photoelectric effect
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Graduate Proving Subadditivity of Entropy for Uncorrelated Systems in Pure States
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Undergrad What does decoherence have to do with phases?
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Undergrad Spectral Decomposition of the State Space
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Graduate Induced dipole moment (adiabatic) following the rotating E-field
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Undergrad Double Slit Experiment Mathematics
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Graduate Question about factoring the Klein-Gordon equation
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Undergrad Few Questions about: TU delft "A loophole-free Bell test"
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Graduate Mathematical representation of two-entangled q-bits?
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High School Non-parallel double slit experiment
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Undergrad Quantum fluctuations & 'virtual particles'
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High School Photon-Electron-Quanta: Explained Simply
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Graduate The Effect of Time-Varying Electric Fields on a 2-Level Ion System
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Graduate Normalization of Morse potential wavefunctions
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Undergrad How Is the Planck Relation E=hf Derived?
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Undergrad Infrared Divergences in Vertex and Self Energy diagrams
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Undergrad MP2 vs. HF Method Explanation for Beginners
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High School How Can We Resolve Noise from Low Frequency Quanta in Electromagnetic Waves?
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Undergrad Inner products and wavefunctions
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Undergrad Explicit non-local form for the vector potential?
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Graduate Cause of spontaneous emission?
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Undergrad Discover Beginner-Friendly Books on Quantum Information and Computation | Q&A
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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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