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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

Undergrad "The wavefunction never collapses"
Undergrad Angular momentum and rotations
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High School Electrons at Absolute Zero -- do they still move?
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Graduate Found a new formula of Dirac calculus
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Graduate Eigenvalue Problem of Quantum Mechanics
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Undergrad The clarity of Heisenberg uncertainty
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Undergrad Approach to extrapolate a "superpositioned" wave?
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Graduate What is meant when a phase is said to have "symmetry protected"?
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Undergrad Unruh, Haag et al.: No Room for Particles in Quantum Field Theory?
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Undergrad How to define expectation value in relativistic quantum mechanics?
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Undergrad Why is quantum mechanics not valid for large objects?
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Undergrad Observer effect in the Dual Slit experiment
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Undergrad How does EM wave geometrical attenuation affect atomic absorption?
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Graduate The eigenvalue power method for quantum problems
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High School Quantum Connection vs Entanglement: What's the Difference?
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High School What is the difference between a wave and a field?
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Undergrad The electron as a smeared charge density
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Undergrad Symbol meaning in CP-violating angle
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Undergrad Do atoms recoil when emitting a photon?
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Undergrad How certain is the uncertainty principle?
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Graduate Solving the Radial Equation for the Dirac Hydrogen Atom Solution
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Undergrad Is Brownian motion a purely classical phenomenon or is it also quantm?
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High School Spin And Angular Momentum of Large Objects
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Undergrad Two hydrogen atoms and Pauli's exclusion principle
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Undergrad Understanding tensor product and direct sum
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Graduate Can four electrons form a completely antisymmetric joint spin WF？
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Graduate Heavy Quark Propagators in HQET
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Graduate Scalar decay to one-loop in Yukawa interaction
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Undergrad Does there exist momentum-shift operator?
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Undergrad Finite Well Problem: Can Energy Be Equal to V0?
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High School Delayed choice experiment and FTL communication
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Undergrad Construction of an Entangled Photon Source
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Graduate Ballentine on the "multicomponent state function"
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Graduate Ballentine on Diffraction Scattering
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Undergrad A very basic question about bra-kets
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Undergrad Parameter Integration of Bubble Integral
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Undergrad Velocity operator, its expression and eigenvalues
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Graduate Understanding time translations in Ballentine
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Undergrad How can multiple entangled Qubits be represented and visualized?
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Undergrad QFT vs GR Cosmological Constant
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Undergrad What are the units of the squeezing parameter?
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Undergrad (extended) Page-Wootters formalism
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Graduate Decoherence in the Heisenberg Picture
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High School What is a photon's structure composed of?
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High School Is the photon a gauge boson for neutrinos?
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High School Does DCQE show a shift between the two "which path" results?
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Graduate Heisenberg picture and Path integrals (Zee QFT)
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High School Are electrons in atoms always in eigenstates?
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Undergrad Experiment with gamers, random numbers and entanglement
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Undergrad Why is the minimum energy equal to the energy uncertainty?
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Undergrad Use of an Essentially Ubiquitous Equation
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High School The energy of a molecule has what sign?
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Undergrad What is an observable exactly?
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Undergrad Global evolution of a Bell pair of photons
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Undergrad Uncertainty Principle in QFT & Early Universe Conditions
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Undergrad Intuition for why linear algebra is needed in quantum physics
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Undergrad Laser and hair - scattering or destructive interference?
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Undergrad Are the proton and electron quantum entangled in the hydrogen atom?
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Graduate Can anyone give me the details of creating a cat state in Circuit QED?
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High School For what elements does Born–Oppenheimer approximation fail the most?
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Graduate Maxwell theory invariant under dual field strength tensor application
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Undergrad Two Entropy scenarios on a system
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Undergrad Can the Transverse Nature of a Wave from an Electron Gun be Observed?
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Undergrad Proving Behavior of Particle in Infinite Potential: Wave Function?
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High School Is superconductivity something usual or weird?
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Undergrad Is the mass of a photon stationary in space?
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High School Does Destructive Interference Affect Starlight in a Double Slit Experiment?
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Undergrad Is a photon emitted in a particular direction?
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Graduate The experiment of Kim et al. (1999) (with small modification)
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Graduate Purification of a Density Matrix
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Undergrad Feynman's QED; 36,000 revolutions per inch for red light.
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Undergrad Multiplying three vector operators
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Graduate Absorption and emission spectrum in quantum optics
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Undergrad Movement of protons between orbital bands in the nucleus
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Undergrad Time/space symmetry in Dirac Equation
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Undergrad How to derive Schrodinger's equation?
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Undergrad The left-right symmetry and forbidden triplet spin state
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Undergrad Fermi's golden rule: why delta function instead of density states?
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Graduate Hamiltonian V and T of a lattice?
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Graduate Physical explanation of time-correlation function and spectrum
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High School Spectral lines and superposition of states
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Graduate Jaynes-Cummings Hamiltonian: Where did the time dependence go?
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Graduate Did rotating polarizer show violations of Bell's Inequality?
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Graduate Gamma matrices and Gell-Mann's I - Y categorization
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Graduate Definition of the Wilson action on a lattice plaquette?
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Undergrad Planck’s constant: Why are atom vibration frequencies integers only?
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Undergrad QED/Quantum Mechanics: Probability or Spatial Function?
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Graduate References: continuum approximation of discrete sums?
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Undergrad Can I use the Schrodinger picture when the Hamiltonian is time-dependent?
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Graduate Time Ordering Operator for Fermions & Bosons
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High School Curious about this proposition for measuring for FTL
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Graduate Why Are the Peaks at Δ = 0 and Δ = ω_m Equally High?
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Undergrad What is the significance of recoupling in spin network theories?
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Undergrad Use of Gell-Mann matrices as the SU(3) basis for gluon states?
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Undergrad Axion Interaction: Weak & Strong Nuclear Forces
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Undergrad Query on use of prism in delayed choice quantum eraser experiment
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Undergrad Is the superposition of mesons (such as pion) a new particle?
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Undergrad How Is the Matrix V Related to Dirac Spinors and Tensor Products?
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High School Quantum field theory and wave particle duality
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Undergrad Single Photon States: Definition & Real-Life Applications
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Undergrad Evaluating the quark neutrino mixing matrix
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