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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 Universal quantum physics
Graduate QFT question about using momentum raising and lowering operators
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Graduate Functional Determinant of a system of differential operators?
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High School Quantum Tunneling different individual transmission probabilities
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Undergrad Spin in Real Space: Meaning of Z-Component
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Graduate Converting between field operators and harmonic oscillators
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Undergrad Schrodinger equation on the complex disk
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Undergrad The wave function in the finite square well
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Undergrad Understanding the Role of Space Energy Propagator in Quantum Field Theory
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Undergrad On 1/2 spin - which is the X axis?
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Undergrad Confusion about position state kets
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Graduate 2-electron system under compression
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Graduate Absorption of an Exciton and Exciton propagation
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Graduate How to calculate the interband velocity matrix in a graphene system
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Undergrad Quantum operators and trasformation under rotations
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Undergrad Explaining atoms and bonding using entropy
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Undergrad Matrix Representations of the Poincare Group
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Graduate Concurrence as a measure of entanglement
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Undergrad Using general relativity to violate the uncertainty principle
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Undergrad Double Slit Interference Question
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Undergrad Double Slit Interference Question II
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Graduate Quantum computers and Annular Josephson junctions
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Undergrad Double Slit Experiment Question
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Undergrad Double slit-experiment confusion
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High School Can entangled electrons in helium be observed and measured in practice?
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High School Understanding Photon in a Box: Eigenmodes, Reflection, and Energy Measurement
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Undergrad Why isn't the Goldstone boson on the Standard Model map?
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Undergrad Really? Schrödinger's cat again?
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Undergrad Why is the speed of photons different?
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Graduate Quantum finance equation explanation please
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Undergrad Is Quantum Mechanics Infinitely More Complex than Classical Mechanics?
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Undergrad Lorentz violation, multiple preferred frames, vacuum energy
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Undergrad Physicists entangle 15 trillion hot atoms
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Undergrad Struggling with one step to show quantum operator equality
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Graduate Ground state energy of a particle-in-a-box in coordinate scaling
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Graduate What is the cause of radioactive decay?
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Undergrad A question about operator power series
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Undergrad What happened to the spatial degrees of freedom for the second particle?
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Undergrad Question about this "Quantum laser pointer" that I bought
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Undergrad QED on electromagnetic interactions in atoms
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Undergrad Is it possible for non-spherical atomic orbitals to have spherical symmetry?
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Graduate Contribution of vacuum fluctuation to the self-energy of the electron
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Graduate Hartle-Hawking sum over all possible metrics?
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Undergrad Question about simultaneous measurement
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Undergrad Understanding how to get the unpolarized cross-sections
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Undergrad Maximum violation of Bell's Inequalities?
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Graduate Can Quantum Mechanics Calculate the Frequency of an Atomic Clock?
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High School Bell's theorem, QFT, and the Relativity of Simultaneity
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Graduate Quantum Period is Compression Robust
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Graduate Positive polarity of a retarded Green's function's imaginary part
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Undergrad Seeking better explanation of some quantum stats formulae
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Graduate Question: Unambiguous discrimination between two non-orthogonal states
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Undergrad Feynman's Lectures volume III (Ch:8) -- Resolution of vector states
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Undergrad Partition function of quantum mechanics
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Undergrad Clebsch–Gordan coefficients: An Identity
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High School What happens to the uncertainty principle if....
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Undergrad Probability of finding a particle in a 1-D box max. at centre?
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High School Compressing Light: Reflection in Small Gaps
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Undergrad Quantum Field Operators for Bosons
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High School Question about notation in the Feynman Lectures on Physics III 3-1
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High School Why are protons allowed in the nucleus?
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High School Uncertainty versus impossibility of measurement
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Undergrad Can the spin cause the collapse?
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Graduate Should tensor sum be used in matrix mechanics?
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Undergrad Many-Worlds Theory: Simulation Program in C#
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Undergrad Invariance of a system under symmetry operations
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High School Virtual Particles are not Dark Matter?
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Undergrad Commutator of ##L^2## with ##L_x,L_y,L_z##...
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Graduate Understanding how to derive the differential cross-section formula
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Undergrad The period-finding circuit for Shor's algorithm
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High School What Is the Occurrence Rate of Path Integral in a Photon Double-Slit Experiment?
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Graduate Off-diagonal elements in a density matrix
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Graduate Relation between Dirac's equation density matrix and current with spin
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Insights Clarifying Common Issues with Indistinguishable Particles
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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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Graduate 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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Graduate Quantum physics and the theory of evolution
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