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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
Graduate General Gauge Invariance Problem
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Graduate Wave Function Collapse and Entropy
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Graduate Time Evolution of Measurables(Hamiltonian)
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Graduate REU student working on QFT seeking help
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Graduate Hamiltonian of linear harmonic oscilator
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Graduate Do you have any interest in Quaternionic Quantum Mechanics?
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Graduate Quick question about Kronecker delta function
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Graduate Is it possible to create a higher energy photon from two lower ones?
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Graduate Bell Proof Against Hidden Variables in EPR
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Graduate Real Time Entanglement from the Zeilinger Group
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Graduate Definition of a wavefunction as a function of position.
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Graduate Is coherence a single photon phenomenon?
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Graduate Probability Greater than 1 in λφ^4 Theory
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Graduate Could packet round-trip times be an analog to qubits?
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Graduate I need all the information about theHeisenberg's uncertainty principle
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Graduate Can Individual Gluons Be Extracted from a Nucleus?
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Graduate What is the difference between quantum mechanics and QFT?
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Graduate Photon emission by an excited hydrogen atom
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Graduate Classical Limit formula for differential cross section for Hard Sphere
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Graduate Common eigenvalues for two states or two bases of same state?
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Undergrad Why does vacuum have properties?
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Graduate Is E Always Greater Than V(x) in the Time-Independent Schrodinger Equation?
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Graduate (Peskin and Schroeder) Numerator of vertex correction
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Graduate Statistical Operator: Explaining Temperature in Physics
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Graduate Quasi-historical question about black body radiation
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Graduate Shouldn't the mass of an electron be uncertain?
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Graduate Unitarity angular momentum operators
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Graduate Basic question on quantum mechanics and choice
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Graduate Cassimir's Dark Energy Plate Experiment
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Graduate Can UV photons spontaneously convert into IR photons, and vice versa?
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Graduate How meaurements increase entropy?
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Graduate Degenerate perturbation theory degeneracy not lifted by perturbation
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Graduate Http:www.univie.ac.at/qfp/publications3/pdffiles/1999-10.pdf real?
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Graduate So what exactly is entanglement?
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Graduate Non-locality and the Bekenstein bound?
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Graduate Neutron Spin Time Evolution in Interferometer
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Graduate Can Entropy Decrease After a Projective Measurement?
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Graduate Quantum Behavior As Extreme Classical Behavior
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Graduate If decoherence matters in 2 different observables
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Graduate Field transformations in Weinberg's QToF
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Graduate Spectrum of the Hamiltonian in QFT
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Graduate Vacuum expectation values of combinations of ##a^\dagger## and ##a##
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Graduate Wick theorem for particle-antiparticle annihilation
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Graduate Four Handed Entanglement - With a Catch
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Graduate Why Do We Need Fields as Annihilation & Creation Operators?
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Undergrad Is it possible to slow down/stop the light?
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Graduate How Does Quantum Entanglement Affect Electron Spin Measurements?
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Graduate Field Theory Partition Function
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Graduate How does the Klein-Gordon Lagrangian relate to the equations of motion?
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Graduate How to solve for allowed energies with the WKB approximation?
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Graduate A question about optical theorem
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Graduate A modified double slit screen scenario- what would happen?
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Graduate The Quasi Classical Approximation(Landau Lifshitz)
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Graduate Hankel Functions: Solutions to Cylindrical Wave Equation
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Graduate Relation between mass and wave function
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Graduate A single atom in a cold, closed, vacuum system.
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Graduate How Do We Correctly Calculate the Distribution of Bosons Among Energy Levels?
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Graduate Double Harmonic Approximation IR intensties
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Graduate Trying to wrap my brain around entanglement-superposition
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Graduate Need help seeing that phase-space area is action
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Graduate Field and conjugate independent?
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Graduate Does gravity break down in the big bang?
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Graduate Acceleration operator and the electron in a hydrogen atom
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Graduate Wavepacket incident on a potential step
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Graduate Existence of Pure Quantum States
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Graduate Representation of linear operator using series ?
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Graduate Number of possible wavefunctions only countably infinite?
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Graduate Is dBB reproducing quantum results ?
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Graduate Pulling out partial derivatives?
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Graduate Uncertainty Relation between Lx and Ly
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Graduate Can Singlets be Prepared with a Preferred Direction?
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Graduate Quantum teleportation and the density matrix
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Undergrad Photocurrent and frequency of incident light
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Graduate Is Squaring the Momentum Operator the Same as Applying it Twice?
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Graduate Transforming Representations of SO(3) to Act on Vectors?
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Graduate What are raising & lowering operators
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Graduate Matrix exponentiation using gsl library (Computational Quantum Mechanics)
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Graduate Expectation value at ground state
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Graduate Why doesn't one-photon-irreducible function have any pole at q^2=0?
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Graduate What is the minimum observer energy?
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Undergrad Question about magnetic field generation by stream of electron
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Graduate Stability of atoms in QM / QED
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Graduate Time independant perturbation problem
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Graduate Molecular material ground state
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Graduate Parametrization of uniformly distributed n dimensional states
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Graduate Are Bose Eistein Condensates Classical Objects
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Graduate What Misconceptions Exist in What The Bleep Do We Know?
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Graduate Collection of foundational papers?
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Undergrad The strength of electromagnetism in an atom?
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Graduate Time independant perturbation - Difficulty understanding derivation
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Graduate At what point does gravity become incompatible with QM?
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Graduate Probability of finding electron.
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Graduate Spin singlets and the Bell states
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Graduate Finite Hilbert Space v.s Infinite Hilbert Space in Perturbation Theory
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Graduate Initial wave function for an electron in a magnetic field
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Graduate What makes virtual particles separate and come together?
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Graduate Does photon exist without velocity c ?
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Graduate HUP and good quantum numbers that commute
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Undergrad Do electrons need specific energies to excite electrons
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Graduate How can the expression for orthonormal states be simplified?
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