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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 Concepts to understand Quantum Tunneling
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Undergrad Wave Function Collapse: Quantifying Quickness
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Graduate Can imaginary position operators explain real eigenvalues in quantum mechanics?
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High School Quantum Teleportation Question from a Curious 10 year old
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High School Why doesn't this FTL communication scheme work?
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Graduate Implications of violation of the Leggett–Garg inequality
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High School Quantum state of the Universe?
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Undergrad Squaring a Sum of Ket-Bra Operators
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Graduate Superluminal Signalling proposal in peer-reviewed journal
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Undergrad Fermi gas at the absolute zero T
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Undergrad Concept underlying recent Serra-Lutz cold-to-hot experiment
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Undergrad Behavior that seems to violate the arrow of time, but....
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Undergrad Is the Compton scattering angle related to the incident energy?
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Graduate Hamiltonian in an electromagnetic field
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Undergrad Can angular momentum be applied to non circular rotations?
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Undergrad Schwinger effect verified by Unruh temperature?
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Undergrad Hamiltonian for an Optical Phase Shifter?
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Undergrad QCD Sign Problem: Adding Quarks, Does it Change Properties?
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Undergrad Spin Measurements: Up vs Down | Gf
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Undergrad The Relation Between Wavefunctions in Dirac Equation
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Graduate What are local and non-local operators in QM?
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Undergrad Dirac's Rest Mass in Minowski Spacetime
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Undergrad Dirac-Delta Function, Different Integration Variable
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Undergrad Little issue regarding physical states
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Undergrad Modified double-slit experiment - two photons
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High School Quantum Mechanics is not a theory?
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Graduate How does a pseudo-Hermitian model differ from a Hermitian?
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Mathematical Quantum Field Theory - Field Variations - Comments
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High School Casimir effect, energy conservation
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Mathematical Quantum Field Theory - Geometry - Comments
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Mathematical Quantum Field Theory - Lagrangians - Comments
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Graduate Quantum physics phenomena that have spiral-phase portraits?
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Graduate Transformation of position operator under rotations
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Graduate Shor's algorithm - need to uncompute auxiliary qubits?
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High School Beam splitter, one photon, one detector?
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High School Quantum Tunneling: Reflection and Transmission Probabilities Explained
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Undergrad Canonical Quantization: Proving the Theory
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Undergrad 2-particle Wavefunction and the Pauli Exclusion Principle
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Undergrad Requirements for pair production
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High School Why Can't Two Fermions Occupy the Same Quantum State?
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Undergrad Can We Cool a Macroscopic Crystal to 1 nK?
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Undergrad Fubini-Study metric of pure states
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Undergrad Can Entangled Clocks Synchronize Time in Quantum Physics?
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Undergrad What does complex conjugate of a derivate mean?
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Undergrad Understanding Neutron Star Formation Through Feynman Diagrams
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Undergrad Quantum Entanglement: Particle Connection Effects
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Undergrad Distinguishing electrons through spin
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Undergrad How Can Fermi Pressure Be Explained in Relativistic Conditions?
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Undergrad Measurement Values for z-component of Angular Momentum
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Undergrad What mechanism enables interaction of the fields?
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Graduate Shor's algorithm and similar exploitation of QM?
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Undergrad How does a harmonic oscillator model have the same frequency
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Undergrad Understanding Continuous Variable QKD
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Graduate Why light beams attract or repel each other even when they don't have charge
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Undergrad Dirac equation solved in Weyl representation
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Undergrad Anihilation operator expression: is there a typo here?
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Undergrad Superposition States: Is TDSE & TISE Satisfied? Check Here
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Undergrad Can Photons travel faster than c?
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Undergrad Feynman Path Integral: Teaching and Questions
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Undergrad Fluorescence from core shell quantum dots
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Graduate Question about QFT Diagrams and their Integrals
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High School Understanding Particle Spins: A Beginner's Guide
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Can there be a subquantum level?
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Undergrad Alternate form of wave equation
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Undergrad Exploring Multi Particle States: Fermions vs. Bosons
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Undergrad LS-Coupling: intuition why 2p^2 has no singlet P?
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High School Possible Loophole in the uncertainty principle
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Mathematical Quantum Field Theory - Spacetime - Comments
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Undergrad Multiplying a wavefunction by a constant number
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Undergrad Dirac Matrices and the Pythagorean Theorem
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Undergrad Generating a Hilbert space representation of a wavefunction
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Graduate Integral ##\int_{-1}^{1} [P_{l}^{m}]^2 ln [P_{l}^{m}]^2 dx##
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Undergrad Probability vs radial density-confusion
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Undergrad Wave Functions of Definite Momentum
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Undergrad Does the path Integral contain virtual particles?
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Undergrad Probability of Staying in x<0 for Superposition of 2 Gaussians
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Graduate Topological Quantum Field Theory: Help reading a paper
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Undergrad Where Does the Energy Go in a Quantum System with 3 Possible Measurements?
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Undergrad Can a wave-function be a combination of states with different energies?
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Undergrad Amplitude to go from one state to another
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Undergrad Will a uniform magnetic field be considered as measurment?
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High School Alain Aspect's experiment setting
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Undergrad Berry phase, Bra-Ket and gradient
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Undergrad What is the Conservation of Information in Quantum Mechanics?
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Undergrad Measurement of a particle's position using photons
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High School Electron gyromagnetic ratio & lattice qft
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Graduate A question about the information loss paradox
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Undergrad Why there must be a way of including gravity into a quantum theory?
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Insights Introduction to Perturbative Quantum Field Theory - Comments
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High School Can Fermions Exhibit Negative Chemical Potential Like Bosons?
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High School Reflection of light from the mirror
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High School What is the Meaning of Abstraction in Modern Physics?
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Graduate What does it mean for the Hamiltonian to not be bounded?
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High School Understanding Measurements / Collapse
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High School How do particles become entangled?
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Undergrad Double sided arrow notation in Dirac Field Lagrangian
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Undergrad Under what conditions do the Zeno and anti Zeno effects occur?
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Undergrad Quantum entanglement, wave-function collapse
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Graduate General definition of interferences clarification
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Undergrad Hermitian Operators: Referencing Griffiths
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