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

Undergrad On computing quantum waves exactly from classical action
Undergrad How can gravitons have anti particles?
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Undergrad Why does the QFT Lagrangian not already use operators?
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Undergrad Is Planck's Law of Black-Body Accurate?
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Undergrad What sense does it make to "weigh" a Casimir cavity?
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Undergrad Einstein summation convention in QM
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Undergrad Has the Unruh Effect ever been observed?
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Undergrad Quantum events near a black hole
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Undergrad How Do Radio Antennas Function in Quantum Mechanics?
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Undergrad Time-dependent to time-independent Schrödinger equation
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Graduate What is a "transient" value in the Ising model?
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High School About infinity and all possibilities of Multiverse/Omniverse
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Undergrad Haag's Theorem: Explain Free Field Nature
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Undergrad Understanding Planck's Quantum of Action for Beginners
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MHB Matrices Often Used in Quantum Computing
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Undergrad The CMB has a thermal black body spectrum
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Undergrad Polarization of photons quantum mechanically
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High School Understanding Waves, Particles and Probabilities
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Undergrad Does chaos amplify inherent quantum level randomness?
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Undergrad Experimenting with Spinor Rotations & Sign Changes
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Undergrad Operators in finite dimension Hilbert space
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Graduate What are the basic mathematical objects in QFT?
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Undergrad 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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Undergrad Understanding No Energy Degeneracy in Sakurai's Quantum Mechanics
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Graduate Realizing EIT with Pulsed Laser: Intensity, Duration & Frequency
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Undergrad Where does the QM creation operator get its energy?
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Undergrad Inner product - positive or positive semidefinite?
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Undergrad The Wavefunction when Mass is Much Greater than Planck's Constant
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Undergrad Wondering why quantum entanglement occurs
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MHB Quantum Computing: Positive Operators are Hermitian
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Undergrad Why is the SE better than the KG equation for a hydrogen atom?
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High School Heisenberg's Uncertainty Principle and determinism
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High School Sinusoidal wave function of t and x
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Undergrad Vector operator acting on a ket gives a ket out of the state space
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High School Positive Definite Cartan Matrices in Quantum Physics
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Undergrad Bell's circuit beginner's question: Sampling alters, - what's normal?
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Undergrad What is so compelling in the superposition theorem?
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Undergrad Inner and Outer Product of the Wavefunctions
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Undergrad Understanding Wave Function Probabilities for a Free Particle
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Undergrad Entanglement and FTL signaling in professional scientific literature
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Undergrad How does atomic absorption spectroscopy work
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High School The relationship between the particle, the wave and the field
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Graduate Coherent quantization, the non-unitary case
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High School Is the probability of a quantum outcome ever zero such as with....
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Graduate Matrix representation of a unitary operator, change of basis
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High School QM concept of photon.... still a bit of a mystery today?
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Graduate Is there a lost information paradox for quantum physics?
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Graduate Question about stimulated Raman emission
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High School How does exchange of elementary particles result in a force?
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Undergrad Questions about Franck-Condon principle
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Undergrad When and why does an electron emit a photon?
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Graduate Probability flux integrated over all space is mean momentum?
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Undergrad Trying to Understand the 1928 article by Raman on Nature
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Undergrad Understanding Spin States in 2D Vector Spaces
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Undergrad Doubt on Morse potential and harmonic oscillator
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Undergrad With chips having 2 nm transistors, are we at the end of Moore's Law?
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Undergrad Counterfactual quantum computation on interferometer
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High School What is a non-local Hamiltonian?
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Undergrad Determining the Number of Points in the n-Space
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Graduate Can local conservation be verified experimentally?
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Undergrad Has Google Truly Achieved Quantum Supremacy?
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Undergrad Definition of functional derivative
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Graduate Quantum Properties of Quasi Static Electric Fields
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High School What sort of an experiment can refute QM or QFTs?
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Undergrad Is the Energy Expectation Value Always Real and Above a Minimum Potential?
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High School Is the concept of "potential" just a mathematical model?
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Undergrad Quantum computation and entropy
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High School Questions about the position of the particle
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High School Why do subatomic particles change what they do when observed?
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High School Shor's algorithm on a Google Sheet
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High School Is the Heisenberg Uncertainty Principle a result of measurement inadequacies?
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Undergrad Interpreting ##A^{\mu}(x)|0\rangle## and ##\psi (x) |0\rangle##
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Graduate What are the unusual absorption features observed in the EIT signal of 85Rb gas?
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Undergrad Black hole singularity vs. quantum mechanics
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Graduate Current Status of Electromagnetic Triviality
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High School Particle Function? Particle Equation?
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Graduate In What Space Does Quantum Spin Take Place
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Undergrad Partition function for continuous spectrum
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Graduate Energy Levels and Wave Functions of Identical Particle Systems
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Graduate Symmetry & Invariance of Pions: π+, π0, π− and Other Mesons Explained
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Undergrad What happens to the other particle in an entanglement state?
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Undergrad Can entanglement occur in distant galaxies according to NRQM and QFT?
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Undergrad Majorana zero modes observed by Microsoft?
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Undergrad Photon interference and beamforming
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Graduate Calculate the group velocity in EIT (famous paper: light speed 17m/s)
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High School Is All Motion Discrete or Continuous in QM?
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Graduate Is there a generalized second law of thermodynamics?
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Undergrad Dimensions of quantum cell automata's state space
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Graduate What is the cause of the Mexican hat potential of the Higgs field?
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Graduate Relationship between Wilson's RG and the Callan-Symanzik Equation
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Graduate Does the existence of a POVM require an ancilla?
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Graduate Measurement of the phase of coherent states
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Undergrad Time of flight measurement uncertainty
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High School How does the EPR paradox work?
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Graduate What is the role of Slater determinants in quantum chemical methods?
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Graduate Quantum Hall Effect Basics: Topological Insulator & Semi-Metal
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High School Double slit experiment combined with Stern-Gerlach
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High School Wave/Particle Duality: Helical Paths & Planar Projections
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Graduate Has a calculation of the vacuum energy density been done with strings?
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High School How does a spinor affect a wave function?
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