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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

Is the quantum wave function a real object or a mathematical tool?
Graduate The wave function of hydrogen
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Graduate Understanding 'Kronecker Delta' in Feynman's Vol. 3 Lectures on Physics
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Graduate Where does the electron go during a quantum jump?
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Graduate Are We Still Entangled Since the Big Bang?
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Graduate Mediator of electrostatic repulsion
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Graduate What size do particles start to get a quantum effect
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Graduate What is the Uniqueness of Operators Acting on Bras in Quantum Mechanics?
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Graduate Dirac's Quantum Mechanics - the definition of the time evolution operator
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Graduate General Formula for atomic emission spectra
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Graduate Explaining the Inclusion of Minus Sine in the Heisenberg Hamiltonian Definition
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Graduate How Does the ΔS = 0 Selection Rule Arise?
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Graduate Singlet/Triplet state mixing question
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Graduate Understanding the Deterministic Evolution of Wave Functions in Quantum Mechanics
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Graduate Pilot wave theory, fundamental forces
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Graduate Understanding Scattering in Quantum Mechanics
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Graduate Superposition principle explained
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Undergrad What was the ultraviolet catastrophe
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Undergrad Is It Accurate to Measure the Elementary Charge with Just One Oil Drop?
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Graduate Gauge Theory: Simplified Explanation & Examples for Physics
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Graduate Who first solved the hydrogen atom in quantum mechanics?
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Graduate Maxwell-Bloch equations and operator-products
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Graduate Is It Legal for Electrons to Have Energy Between Atomic Orbitals?
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Graduate No logically consistent relativistic quantum theory?
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Graduate Poincare Recurrence and the Klein-Gordon Equation
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Graduate I am doing a measurement in a system S with the apparatus A, in an
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Graduate Trying to find references for polarization effect of Normal Zeeman Effect
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Graduate Effect of phase difference on interference pattern
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Graduate Scattering partial wave expansion question
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Graduate How Should I Begin Studying Topological Quantum Field Theory?
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Graduate Timelike Curves leads to violation of heisenberg uncertainty Relation
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Graduate Bosons's amplitude to go into the same state at low temperatures
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Graduate Equality of expectation value integral over coordinate space and over energy
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Graduate QM: What are Tensor Operators & How to Understand Georgi's Definition?
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Graduate Collapse of wave function question
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Graduate 4-point correlation in phi 4 to first order
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Graduate Partial trace of density matrix
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Graduate A quantum particle at rest viewed from a merry-go-round.
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Graduate Question for understanding photon entanglement
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Graduate Understanding Exponential of Operator: Expansion and Eigenvalues Explained
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Graduate Klein-gordan Hamiltonian time-independent?
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Graduate Measurement of spin due to the force on a magnet
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Graduate About eq. (5.7.23) in Weinberg's The quantum theory of fields vol. I
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Graduate Quantum Falling Magnet: Lenz's Law Demo?
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Graduate Dimensions of klein-gordon field
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Graduate Question about quantum numbers:
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Graduate What are Virtual Particles and How Do Borrowing and Repaying Work?
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Graduate Weih's data: what ad hoc explanations do local and non-local models give?
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Graduate Wave-particle duality is a correct theory of reality
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Graduate Nonlinear evolution of the quantum mechanical state vector
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Undergrad What is the momentum of an electron?
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Graduate How does a non-linear Schrodinger equation implies non-unitary evolution?
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Graduate A question regarding tensor product of hilbert spaces
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Graduate What Particles Could Have Spin 2 1/2 in Physics?
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Graduate A classical wave as sum of many coherent quantum wavelets?
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Graduate Eigenvalues for X’s Pauli's matrix
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Undergrad Symmetry and symmetry breaking
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Graduate Wave properties of an electron
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Graduate Question on Decoherence and the Delayed Choice Quantum Eraser
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Graduate How Do Spin and Symmetry Relate in Particle Physics and SUSY?
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Graduate Undergrad w/o formal quantum introduction, having trouble
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Graduate Total energy vs. energy in a finite region
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Graduate Effective field theories, eliminating fields using equations of motion
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Undergrad Different formulas, same physics?
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Graduate Wiegner Eckart theorem, I don't understand it
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Graduate Parity switching wave functions for a parity invariant hamiltonian?
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Graduate Is Braket Operation Legal? Elaborate Here
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Graduate Isn't all action, spooky action at a distance
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Graduate What we know about the foundations of Quantum Mechanics?
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Graduate Is a slit automatically also a detector?
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Graduate What are the implications of this experiment?
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Graduate Zero Point Energy: Harmonic Oscillator vs Rigid Rotator
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Graduate I am not sure to put this in this secton or computer section
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Graduate Does any field, other than gravity, bend space-time?
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Graduate Identical fermions in a box - degenerate states
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Graduate Help clarify the probability of pure states and mixture of states
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Graduate A simple quantum experiment: what have I got wrong?
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Graduate Bloch modes and normal waveguide modes- help to clear up
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Graduate Normalization of Radial wavefunction of hydrogen atom
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Graduate Covariant Notation: Understanding Its Basics and Applications
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Graduate Velocity Distribution function of molecule at low temperature
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Graduate Quantum Nonlocality and Causation
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Graduate What is the minimum level of energy in quantum physics and who determined it?
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Graduate Find units of transition dipole moment
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Graduate Defining velocity distribution
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Graduate Source of Casimir effect energy
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Graduate I can't visualize spin I know that its not just a particle rotating
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Graduate Necessity of Bell's experiment
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Graduate Average Randomness Thought experiment
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Graduate Is there a consensus on Bell's Theorem and its implications?
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Graduate Role of hermitian and unitary operators in QM
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Graduate Can Sending Signals Through Time Help Predict the Future?
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Graduate New and have a few initial questions.
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Graduate Layman question about quantum theory.
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Graduate The Role of Eigenvectors and Eigenvalues in Quantum Mechanics
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Graduate Polarization vector in Peskin & Schroeder QFT
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Graduate High energy particles and uncertainty
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Undergrad Combining light beams question
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Graduate Which order do you take derivative of delta function?
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Graduate Why Does Bell's Calculation Yield a Negative Cosine?
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Graduate Interesting New FQXi Contest Essay re: Signal Causality
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