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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

I Physicists disagree wildly on what quantum mechanics says about real…
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Insights A Beginner Physics Guide to Baryon Particles
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Insights The 7 Basic Rules of Quantum Mechanics
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Insights What is the Anatomy of Compton Scattering?
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B Guidelines for Quantum Physics Forum
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I Angular Momentum Vector and Its Magnitude
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I Antilinear Operators
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I Antiproton and positron annihilation
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I Question about photon entanglement and causality
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I Need Help on Particle Spin
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I Can (ordo) Fermions convert to Bosons?
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I Elementary question about comparing notations of inner product
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I The Power of QM and QFT
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I Entanglement might be the result of an underlying law?
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I Importance of Hanbury Brown and Twiss experiment
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I Prof Mike Wiest's proposed link between quantum and consciousness
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A Is It Known For Sure Infinites In QFT Are Caused Using a Continuum?
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A Lesser Green's function
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I What does the product part of Laughlin wave function mean?
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I Does a qubit break interference in the double slit experiment?
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I Schrödinger equation and classical wave equation
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B New idea about wave-particle duality - looking for feedback/criticism
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I Is Maxwell's electromagnetism an effective (field) theory?
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I Why can’t photons “pile up” to eject an electron?
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I The Extended Wigner's Friend Scenarios
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Insights Quantum Entanglement is a Kinematic Fact, not a Dynamical Effect
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A I have some naive questions about the Reeh-Schlieder theorem
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I Do ensemble-based predictions truly describe real finite systems?
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I How strong is the justification for low probability extreme thermal fluctuations?
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B Is a table levitating possible, even at a minuscule probability?
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I Energy*time uncertainty for particle decay
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I Commutation of operators for particle in a box
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I Quantum Entanglement and Synchronization
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I Electron energy in atoms
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A What is the connection between entanglement and the no-cloning theorem?
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B Two/three photon absorption chemical substance producing photons for electricity generation
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B Quantum entanglement
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I Quantum behaviour of an electron around a positively charged sphere
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I Visual depiction of atomic orbitals
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B Can gravitons be detected?
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I Bloch Sphere generalization for more than one qubit
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I Probabalistic determination Photon Entaglement
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I Commutator of x and p in quantum mechanics
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A Physical properties of the vacuum in GR vs. QFT
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A Confusion about creation/annihilation operators with interaction
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B Schrödinger's cat question
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A Eigenstates of the Klein Gordon Field Operator
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I Direction of time-evolution in time reversed wave functions
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A Angular momentum uncertainty principle and the particle on a ring
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A Effects of perception
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I Emission probability in blackbody spectrum derivation
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I Phase and group velocity for the wave function
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I Validity of identical eigenfunction of commutating operators
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I Action of an Hermitian unitary operator member of SU(2)
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I About concept of wave-particle duality
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I Hydrogen 21 cm line time?
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I I would like some assistance working with commutators
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I Shape of wave function (probability distribution) of a single photon
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I Would gravitons theoretically act like photons?
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A Baryon CP Violation Observed at CERN
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A Geometry Topology and Physics: Nakahara, Chapt. 1: Weyl Ordering
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B Energy-time uncertainty relation for a volume and macroscopic objects?
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A What happens when an operator maps a vector out of the Hilbert space?
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B The wave function of the electron doesn't collapse when passing through air?
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I New book on algebraic quantum physics
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I A question about density matricies
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I Density matrix representation of a density operator
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I How to understand quantum computers?
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I Bose-Einstein statistics and the Photon
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A Explicit construction of Galilean-invariant space
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I Addition of angular momenta
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I Quantum decoherence vs. measurement process
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I Quantum eraser experiment
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A 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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I Bob and Alice with a Bell pair
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B Gravitons vs photons: Does the size of the atom make any difference?
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I What's the deal with instantons?
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I How to derive orbital angular momentum of spins in quantum mechanics?
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I Deriving Bogoliubov transformations correctly
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I Dirac's 1972 Boston talk on Projective geometry in quantum mechanics
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B Feynman QED Questions
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A Scattering cross section between charged particle and magnetic moment
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I More information on the momentum eigenstate in the position basis
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I Measurement problem - will this work?
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I Quantum wavelength in gravitation
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A Pauli–Villars ghost fields?
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A Magnetic field produced by moving charge in operator form
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I Tensor products and simultaneous eigenstates
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I Molecular Quantum Computer Progress
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I Coherence time for repeated spin measurements
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A John Bell 1964 toy model for spin
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B Thought experiment: Beyond the slowest measurable speed?
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I Black Hole Fermion Count
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I Free Schroedinger equation: time separation
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I I would like an explanation of these extra energy states
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A Causality in QFT
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B General question about series limits and strong lines of the emissions spectrum
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A Time Reversal and initial conditions
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I Choice of basis in BB84 protocol
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I Time dependent Hamiltonian and energy
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I I want to understand how the transmission coefficient is obtained
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I Postulate of only time dependence on |ψ⟩
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I When is Â(r) Ψ(r) = ⟨r | Â | Ψ⟩?
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I A short attenuated laser pulse, LIGO, and a fast detector
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