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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 What is matter?
High School Schrödinger's cat question
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Undergrad How can quantum physics contribute to medical physics?
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Graduate Eigenstates of the Klein Gordon Field Operator
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Undergrad Direction of time-evolution in time reversed wave functions
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Graduate Angular momentum uncertainty principle and the particle on a ring
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Graduate Effects of perception
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Undergrad Emission probability in blackbody spectrum derivation
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Undergrad Feynman's derivation of average square distance variation in Brownian motion
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Undergrad Phase and group velocity for the wave function
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Undergrad Validity of identical eigenfunction of commutating operators
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Undergrad Action of an Hermitian unitary operator member of SU(2)
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Undergrad About concept of wave-particle duality
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Undergrad Hydrogen 21 cm line time?
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Undergrad I would like some assistance working with commutators
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Undergrad Shape of wave function (probability distribution) of a single photon
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Undergrad Would gravitons theoretically act like photons?
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Graduate Baryon CP Violation Observed at CERN
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Graduate Geometry Topology and Physics: Nakahara, Chapt. 1: Weyl Ordering
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High School Energy-time uncertainty relation for a volume and macroscopic objects?
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Graduate What happens when an operator maps a vector out of the Hilbert space?
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High School The wave function of the electron doesn't collapse when passing through air?
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Undergrad New book on algebraic quantum physics
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Undergrad A question about density matricies
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Undergrad Density matrix representation of a density operator
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Undergrad How to understand quantum computers?
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Undergrad Bose-Einstein statistics and the Photon
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Graduate Explicit construction of Galilean-invariant space
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Undergrad Addition of angular momenta
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Undergrad Quantum decoherence vs. measurement process
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Undergrad Quantum eraser experiment
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Graduate Can scattering experiment be used to determine location and momentum of an electron?
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Insights Quantum Computing for Beginners
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Undergrad Bob and Alice with a Bell pair
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High School Gravitons vs photons: Does the size of the atom make any difference?
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Undergrad What's the deal with instantons?
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Undergrad How to derive orbital angular momentum of spins in quantum mechanics?
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Undergrad Deriving Bogoliubov transformations correctly
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Undergrad Dirac's 1972 Boston talk on Projective geometry in quantum mechanics
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High School Feynman QED Questions
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Graduate Scattering cross section between charged particle and magnetic moment
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Undergrad More information on the momentum eigenstate in the position basis
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Undergrad Measurement problem - will this work?
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Undergrad Quantum wavelength in gravitation
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Graduate Pauli–Villars ghost fields?
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Graduate Magnetic field produced by moving charge in operator form
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Undergrad Tensor products and simultaneous eigenstates
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Undergrad Molecular Quantum Computer Progress
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Undergrad Coherence time for repeated spin measurements
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Graduate John Bell 1964 toy model for spin
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High School Thought experiment: Beyond the slowest measurable speed?
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Undergrad Black Hole Fermion Count
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Undergrad Free Schroedinger equation: time separation
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Undergrad I would like an explanation of these extra energy states
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Graduate Does Causality in QFT Require Commuting Field Operators Outside the Light Cone?
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High School General question about series limits and strong lines of the emissions spectrum
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Graduate Time Reversal and initial conditions
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Undergrad Choice of basis in BB84 protocol
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Undergrad Time dependent Hamiltonian and energy
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Undergrad I want to understand how the transmission coefficient is obtained
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Undergrad Postulate of only time dependence on |ψ⟩
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Undergrad When is Â(r) Ψ(r) = ⟨r | Â | Ψ⟩?
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Undergrad A short attenuated laser pulse, LIGO, and a fast detector
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Undergrad Using a single particle as quantum computer
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High School Bell's Inequalities and the issue of non-locality
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Undergrad Mean values of observables
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Graduate Bell's inequality and experiment
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Undergrad States and observables in quantum mechanics
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Undergrad Passing information faster than speed of light
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Undergrad Energy and momentum in quantum mechanics
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High School Double-slit with movable detector screen
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Undergrad QED replacing photon field with current in 3-point function
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Undergrad Expansion of position kets in terms of angular momentum
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High School About the nature of the Newtonian gravitational formula
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Graduate Numerical implementation of creation and annhilation operators in the SSH model
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Graduate 2nd Quantization states
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Undergrad Heisenberg uncertainty principle and the canonical momentum operator
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High School Heisenberg Uncertainty Principle question
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Graduate Coleman: "Spin is a concept that applies only to particles with mass"
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Undergrad Bose-Einstein statistics for μ>ε
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Undergrad More double slit experiment questions
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Undergrad Matrix element involving raising/lowering operators
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High School Has a Double Slit Experiment Been Conducted in a Vacuum Tube?
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Undergrad Confused about a matrix element
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Undergrad Position operator explicit form
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Undergrad Commutation of position operators in three dimensions
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Undergrad Qubit two-state quantum system
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Undergrad Another Interferometry question please
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Undergrad Can Topological Protection Extend the Lifetime of a Qubit?
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Undergrad Relation between operators and their variables' signs
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High School Can a filter based on the photoelectric effect reduce the noise floor?
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Undergrad Incomprehension of a simple interferometer?
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Undergrad Double-dark Slit Interference Pattern?
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Undergrad What kind of integration is Berezin integration?
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High School The Story of Least Action and the Double Slit
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Undergrad Please help me understand the double slit experiment and conclusion
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Undergrad Understanding the proof of Goldstone theorem
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Undergrad Quick question regarding creation/annihilation operators
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High School Are the electron and neutrino that are emitted in a beta decay entangled?
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Undergrad Homemade double slit experiment
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Undergrad Have You Heard of the SEW Experiment? Thoughts?
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