Quantum Physics Forum

Graduate What is the significance of operator conventions in quantum mechanics?

Graduate Lowest energy state with infinite and finite potential

Undergrad Reduced Planck's constant and Planck's constant?

Graduate Can Electron Degeneracy Pressure be Visualized?

Graduate Hellman-Feynman theorem problem: H2+ binding energy and electron density

Graduate Measurement of entangled particles causes dechorence at a distance?

Graduate Wave functions for 2D potential with spin interactions

Graduate Why does multiplying a state vector by the completeness relation equal one?

Graduate Concepts about infinite potential well

Graduate How do we get the expectation value formula?

High School Variation of the Double-slit experiment

Graduate Can continuously (strongly) measured quantities ever change state?

Graduate Entagled Electrons - measuring both x and y spin

Graduate Interpreting the Dirac equation

Graduate Photon-proton/ proton-electron interactions

Graduate Understanding Wave Packets in Quantum Physics

Graduate Second quantization of the Schrodinger fields

Graduate Planck Arriving at a Relation Between Energy and Frequency with h

Graduate Does detector collapse wave function if no human sees result?

Graduate Why Does the 3s Hydrogen Wave Function Use the Polynomial (27-18σ+2σ²)?

Graduate About the mathematical structure of wave functions

Graduate Commutator Relations; Conjugate Product of a Dimensionless Operator

Graduate Is complimentarity an expression of HUP?

Graduate A problem of momentum representation

Graduate EPR reasoning with triplet state

Graduate Poisson Statistics + Photon Detections

Graduate Principal Difference between electrostatic potntial and gravitational

Graduate Different representations of spinors

Graduate Does observing the screen before erasing which-path information change the result?

Graduate Suppose you have an electron in the infinite square well

Graduate Aid for understanding some calculations

Graduate Why are there fixed electron orbitals?

Graduate Momentum space particle in a box

Graduate The quantum statistical approach

Graduate Are point particles always points?

Graduate Is there a minimum probability threshold in quantum mechanics?

Graduate Why is Phase Velocity Greater than Speed of Light?

Graduate Observation determines outcome term?

Graduate Fierz Identity Substitution Into QED Lagrangian

Undergrad Spectral Line Question: True or False?

Graduate Mathematical incompatibilities between quantum field theory and general relativity

Graduate Step potential with E equal to V0 and full reflection

Graduate Light - stopped or trapped inside a crystal?

Graduate Quantum effects from an imperfect absorber

Graduate Space between bound state energies in some potential.

Graduate Does this article support the existence of FTL particles?

Graduate Atomic models without overlapping N levels

Undergrad Uncertainty Principle in Classical Physics

Graduate What is the status of E=mc^2 in QM/QFT

High School What Uncertainty Principle actually is?

Graduate Questions about HUP, entanglement and coherence

Graduate Exploring the Casimir Effect: Online Resources & Reading

Graduate Entangled particles inside a black-hole

Graduate Micro-canonical Ensemble of Ideal Bose Gas

Graduate Why does measuring electron spin along one axis change the spin direction?

Graduate The Difference Between Bra Vectors and Covectors

Graduate Two hermitian commutator anticommut {A,B}=AB+BA=0

Graduate Delayed Choice Bell-state Quantum Eraser

Graduate The Earth as its own nuclear magnetic resonance machine

Graduate Writing a random 2N by 2N matrix in terms of Pauli Matrices

Graduate Classical Mechanics vs Quantum Mechanics

Graduate Uncertainty on entangled electrons

Graduate Clarifying entanglement and complimentarity

Graduate Renormalization of QFT - the counterterms

Graduate Does detector placement change intensity in the central double slit bands?

Undergrad Why does the electron have spin ±1/2?

Undergrad Could a sufficiently massive atom be visible to the naked eye?

Graduate What is quantum field theory trying to explain?

Graduate Effect of changing probabilities on interference

Graduate Can electrons in an ensemble be in pure spin states?

Graduate How can we measure entanglement?

Graduate Non-interfered vs interfered photons

Graduate Point-particle description and wave-particle duality in QFT

Graduate Potential step with E = V0; classically forbidden or allowed?

Graduate Why are other systems so sensitive to decoherence?

Graduate Solving Schrod. Eqn. for Potential Barrier with E > V

Graduate Difference between a normal wave function and a standing-wave function

Graduate Infinite energy states for an harmonic oscillator?

Graduate Is superposition widely accepted?

Graduate Does a particle have negative kinetic energy in delta function wall

Graduate Is the Universe's History Governed by Macroscopic Superposition?

Graduate Has this approach to non-locality been explored?

Graduate How big/small is Planck constant?

Graduate Derivation of mazwell boltzman statistics.

Graduate Electron far away from the nucleus of ground state H atom

Graduate Is the expectation value of two added operators always additive?

Graduate How does the Bell-state quantum eraser work with diagonal polarizers?

Graduate Why do we need a theory of quantum gravity

Graduate Why does pi+ decay violate superselection rules for charge?

Graduate Non-technical answer wanted about the double-slit experiment

Graduate What is the source of the Dirac field in QED?

Graduate What operator acting on vacuum gives a box of cosmic background radiat

Graduate How a force carrier particle gets a message to its owner particle?

Graduate Why aren't state-reduction theories refuted by diffraction experiments

High School Why do positive and negative charges attract?

• Poll

Graduate Is there a Charge equivalent of Mass?

Graduate Do Elementary Particles Jiggle Like Atoms?

Graduate Replacing mirror M with a beam splitter in an interferometer

Graduate Superpositions of diffusive superpositions examples?

Graduate Spin-half mass term with symmetry breaking