Quantum Physics Forum

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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 Question about discussions around quantum interpretations
I Analytical proof of LASER production
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I New Nobel Aspect contradicts himself on action at a distance bel
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I Predetermination in quantum theory and information theory
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I In Bell's Theorem, communication
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B Will Quantum Entanglement Lead to a 2022 Nobel Prize in Physics?
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A Many-Particle Wavefunction Question
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I Energy from quantum systems in an expanding universe?
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A Concept of wavefunction and particle within Quantum Field Theory
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I Postive rays in cathode ray tube experiments?
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A Why is this C-G coefficient always zero?
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I Wave packet experimental detection
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A Does there exist a proof for these conjectures?
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B What’s the necessity of the strong force?
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I About normalization of periodic wave function
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B Is there another workable interpretation of the Bell Inequality?
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I How can gravitons have anti particles?
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I Why does the QFT Lagrangian not already use operators?
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I Is Planck's Law of Black-Body Accurate?
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I What sense does it make to "weigh" a Casimir cavity?
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I Einstein summation convention in QM
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I Has the Unruh Effect ever been observed?
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I Quantum events near a black hole
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I How Do Radio Antennas Function in Quantum Mechanics?
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I Time-dependent to time-independent Schrödinger equation
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A What is a "transient" value in the Ising model?
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B About infinity and all possibilities of Multiverse/Omniverse
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I Haag's Theorem: Explain Free Field Nature
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I Understanding Planck's Quantum of Action for Beginners
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MHB Matrices Often Used in Quantum Computing
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I The CMB has a thermal black body spectrum
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I Polarization of photons quantum mechanically
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B Understanding Waves, Particles and Probabilities
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I Does chaos amplify inherent quantum level randomness?
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I Experimenting with Spinor Rotations & Sign Changes
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I Operators in finite dimension Hilbert space
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What are the basic mathematical objects in QFT?
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I How does one compute the Fourier-Transform of the Dirac-Hamiltonian?
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MHB Different Kinds of Quantum Computing Measurement Operators
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I Understanding No Energy Degeneracy in Sakurai's Quantum Mechanics
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A Realizing EIT with Pulsed Laser: Intensity, Duration & Frequency
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I Where does the QM creation operator get its energy?
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I Inner product - positive or positive semidefinite?
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I The Wavefunction when Mass is Much Greater than Planck's Constant
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I Wondering why quantum entanglement occurs
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MHB Quantum Computing: Positive Operators are Hermitian
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I Why is the SE better than the KG equation for a hydrogen atom?
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I Vector operator acting on a ket gives a ket out of the state space
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B Positive Definite Cartan Matrices in Quantum Physics
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I Bell's circuit beginner's question: Sampling alters, - what's normal?
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I What is so compelling in the superposition theorem?
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I Inner and Outer Product of the Wavefunctions
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I Understanding Wave Function Probabilities for a Free Particle
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I Entanglement and FTL signaling in professional scientific literature
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I How does atomic absorption spectroscopy work
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B The relationship between the particle, the wave and the field
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A Coherent quantization, the non-unitary case
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B Is the probability of a quantum outcome ever zero such as with....
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A Matrix representation of a unitary operator, change of basis
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B QM concept of photon.... still a bit of a mystery today?
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A Is there a lost information paradox for quantum physics?
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A Question about stimulated Raman emission
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B How does exchange of elementary particles result in a force?
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I Questions about Franck-Condon principle
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I When and why does an electron emit a photon?
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A Probability flux integrated over all space is mean momentum?
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I Trying to Understand the 1928 article by Raman on Nature
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I Understanding Spin States in 2D Vector Spaces
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I Doubt on Morse potential and harmonic oscillator
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I With chips having 2 nm transistors, are we at the end of Moore's Law?
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I Counterfactual quantum computation on interferometer
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B What is a non-local Hamiltonian?
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I Determining the Number of Points in the n-Space
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A Can local conservation be verified experimentally?
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I Has Google Truly Achieved Quantum Supremacy?
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I Definition of functional derivative
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A Quantum Properties of Quasi Static Electric Fields
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B What sort of an experiment can refute QM or QFTs?
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I Is the Energy Expectation Value Always Real and Above a Minimum Potential?
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Is the concept of "potential" just a mathematical model?
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I Quantum computation and entropy
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B Questions about the position of the particle
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B Why do subatomic particles change what they do when observed?
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B Shor's algorithm on a Google Sheet
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B Is the Heisenberg Uncertainty Principle a result of measurement inadequacies?
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I Interpreting ##A^{\mu}(x)|0\rangle## and ##\psi (x) |0\rangle##
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A What are the unusual absorption features observed in the EIT signal of 85Rb gas?
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I Black hole singularity vs. quantum mechanics
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A Current Status of Electromagnetic Triviality
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B Particle Function? Particle Equation?
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A In What Space Does Quantum Spin Take Place
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I Partition function for continuous spectrum
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A Energy Levels and Wave Functions of Identical Particle Systems
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A Symmetry & Invariance of Pions: π+, π0, π− and Other Mesons Explained
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I What happens to the other particle in an entanglement state?
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I Can entanglement occur in distant galaxies according to NRQM and QFT?
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I Majorana zero modes observed by Microsoft?
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I Photon interference and beamforming
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A Calculate the group velocity in EIT (famous paper: light speed 17m/s)
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B Is All Motion Discrete or Continuous in QM?
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A Is there a generalized second law of thermodynamics?
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