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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 Valid local explanation of Bell violations? (Pegg et al., 1999; 2008)
Undergrad Best sources to understand the Wigner-Eckart theorem?
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Undergrad Why does the energy level of an electron in an atom have a width?
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Undergrad Question regarding a Free particle and Hilbert space (QM)
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Undergrad What Do Most Physicists Call the Quantum-To-Classical Cut?
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Undergrad Compatible observables and commutator
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Graduate Gauge Invariance of the Schrodinger Equation
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High School Electrons in a nonmoving conductor and non-varying magnetic field
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Graduate Reading canonical commutation relations from the action (QHE)
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Undergrad Uncertainty between position and angular frequency - is this correct?
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Undergrad Questions about Rotation Groups in Physics
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Graduate E-writing Action on a different slice of space-time, Quantum Hall Effect
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Undergrad Summary of the Universe (2019 version)
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Undergrad Matrix Representation of the Angular Momentum Raising Operator
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Graduate Qubit Energy Level Required to be Unevenly Separated
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Graduate What Is the Renormalized Gluon Dressing Function?
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Undergrad Deduce if the spectrum is discrete/continuous from the potential
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Undergrad Is the wavefunction always an analytic signal?
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Graduate What Are the Key Insights into Electron Triplet States in Quantum Physics?
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High School Probability of spin in the +x direction
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Undergrad Why do we need two representations of SU(3)
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Undergrad How can the photon wave function be described?
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High School Does Retrospective Indeterminacy Reveal a Deterministic Universe?
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Graduate QHE ' the effective action should be a local functional'
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Graduate QHE: rotational invariance, no terms linear in E or B
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High School Measurement postulate = von Neumann’s projection postulate?
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High School Why is it assumed communication through entanglement would be FTL?
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High School How would time flow for each parallel universe?
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Graduate Is there a quantum uncertainty to the number of atoms in a marble?
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Graduate Classical fields: EM fields vs. Gravitational fields
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Undergrad Why spin matrixes number of rows depends of spinn magnitude?
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Undergrad Possible simple Density Matrix Question
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Graduate Can I get electronic copies of the original QM papers?
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Undergrad Does light consist of oscillating vacuum fluctuations?
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High School Can photons of visible light lose energy and become sub-visible?
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Graduate Four spin 1/2 particles at the Vertices of tetrahedron
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Graduate Time-dependent unitary transformations of the Hamiltonian
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Undergrad Understanding the Absence of Rabi Oscillations in the Interaction Picture
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Undergrad Mirrors, phase shifts, and position
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Undergrad On what plane of existence do quantum computations occur?
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High School Tunneling through possible worlds
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Graduate Canonical momentum ##\pi^\rho## of the electromagnetic field
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Undergrad Boltzmann equation and energy level occupancy at infinitely high temp
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Undergrad About L-S interaction or spin orbit coupling
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Graduate Solving Spin-Spin Interaction for Total Spin Commutation
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Graduate Fractional Quantum Hall Effect- degeneracy of ground state (Tong's notes)
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Graduate Kubo Formula Deriviation - interaction picture, complete eigenbasis
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Graduate Does The Use Of The Zeta Function Bypass Renormalization
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Graduate Volume Element for Isotropic Harmonic oscillator
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Graduate Measuring Deflection of Star Light During Eclipse: Separating Space-Time Effects
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Graduate About Glauber's formula(or special Baker–Campbell–Hausdorff
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Undergrad How does gauge symmetry arise in QFT and its implications?
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Graduate Spin change of Fermions and quantum energy spectrum
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Graduate Is renormalization the ideal solution?
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Graduate Hamiltonian background magnetic field, perturbed by electric field
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Undergrad Stern-Gerlach "interferometry"
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High School Quantum computer vs supercomputer performance
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Undergrad QED question: Photons absorbed and emitted by electrons
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Undergrad The expected value (or mean) of X
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Graduate Time Dependent Perturbation of Harmonic Oscillator
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Graduate What is the definition of 'ground state',considering H- ion = -14.35eV
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Undergrad Confused about some notation used by Griffiths
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Undergrad Dirac notation and calculations
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Undergrad What do the commutation/anti-commutation relations mean in QFT?
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High School Roger Penrose's need for a physics Grey area
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Undergrad Quantum number and group theory
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Undergrad Relationship between EM and matter fields in QED
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Undergrad Probability flux inside the finite potential barrier
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Undergrad Fourier Transform of the Wave function
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High School Normalizability of continuous and discrete spectrum
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Undergrad Question about the Pauli equation
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High School Can a quantum particle be simulated on a classical computer?
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High School What is the largest object that exhibits Quantum properties
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Undergrad Wave function for a helium atom
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Undergrad Parity and Interactions: Misreading or Misunderstanding?
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Graduate Fock spaces and inequivalent ccr representations
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Graduate Overlap of nth QHO excited state and momentum-shifted QHO ground state
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Undergrad Giving mass to other particles?
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Undergrad Calculating a particular amplitude with Feynman diagrams
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Graduate Difference between russel-saunders-coupling and spin-orbit-coupling
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Undergrad Time Delay Information Transfer with Entangled Particles
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Undergrad Energy at classically forbiden positions
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Undergrad Observation = interaction, question from a dummy
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Undergrad Raising and Lowering Operators
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High School Is it true that QED explains the reflection of light?
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Undergrad Could the Discovery of the Graviton Connect Quantum and Classical Physics?
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Undergrad When can the Klein-Gordon Equation be used for a photon?
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Undergrad Entanglement/correlations in time
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Graduate Measurements and electroweak gauge invariance/transformations
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Graduate What is the solution for two electrons on a sphere?
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High School Photons as bullets at 10 trillion FPS (frames per second)
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Graduate Canonical quantization of Electrodynamics: physical intuition ?
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High School Photon Continuity in Double-Slit Experiment
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High School Is the Velocity of Electron Spin Calculable Using Classical Models?
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Undergrad It seems QFT and QM contradict with each other?
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Graduate Increase of coherent length in stimulated emission
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Undergrad How Peskin & Schroeder simplified this horrible product of bilinears?
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High School Can entangled particle pairs be measured at the same time?
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Undergrad Why is the position of a massive particle not blurred?
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Undergrad Why is position just a label in QFT?
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Undergrad Bracket VS wavefunction notation in QM
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