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.
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Undergrad Can I find a particle in two states simultaneously?
- Ahmed1029
- · Replies 2 ·
Undergrad Analytical proof of LASER production
- SteveHowe73
- · Replies 3 ·
Undergrad New Nobel Aspect contradicts himself on action at a distance bel
- RayTomes
- · Replies 2 ·
Undergrad Predetermination in quantum theory and information theory
- Green dwarf
- · Replies 15 ·
Undergrad In Bell's Theorem, communication
- ndvcxk123
- · Replies 1 ·
High School Will Quantum Entanglement Lead to a 2022 Nobel Prize in Physics?
- Duplex
- · Replies 2 ·
Graduate Many-Particle Wavefunction Question
- CuriousLearner8
- · Replies 13 ·
Undergrad Energy from quantum systems in an expanding universe?
- Suekdccia
- · Replies 1 ·
Graduate Concept of wavefunction and particle within Quantum Field Theory
- Jufa
- · Replies 7 ·
Undergrad Postive rays in cathode ray tube experiments?
- sol47739
- · Replies 2 ·
Graduate Why is this C-G coefficient always zero?
- euphoricrhino
- · Replies 7 ·
Undergrad Wave packet experimental detection
- VVS2000
- · Replies 4 ·
Graduate Does there exist a proof for these conjectures?
- hilbert2
- · Replies 2 ·
High School What’s the necessity of the strong force?
- Th3
- · Replies 2 ·
Undergrad About normalization of periodic wave function
- KFC
- · Replies 4 ·
High School Is there another workable interpretation of the Bell Inequality?
- .Scott
- · Replies 4 ·
Undergrad How can gravitons have anti particles?
- BadgerBadger92
- · Replies 24 ·
Undergrad Why does the QFT Lagrangian not already use operators?
- Gerenuk
- · Replies 11 ·
Undergrad Is Planck's Law of Black-Body Accurate?
- happyparticle
- · Replies 7 ·
Undergrad What sense does it make to "weigh" a Casimir cavity?
- timmdeeg
- · Replies 9 ·
Undergrad Einstein summation convention in QM
- dyn
- · Replies 19 ·
Undergrad Has the Unruh Effect ever been observed?
- lindberg
- · Replies 13 ·
Undergrad Quantum events near a black hole
- gnnmartin
- · Replies 25 ·
Undergrad How Do Radio Antennas Function in Quantum Mechanics?
- sol47739
- · Replies 4 ·
Undergrad Time-dependent to time-independent Schrödinger equation
- LagrangeEuler
- · Replies 5 ·
Graduate What is a "transient" value in the Ising model?
- user366312
- · Replies 1 ·
High School About infinity and all possibilities of Multiverse/Omniverse
- Ug Nagdi
- · Replies 14 ·
Undergrad Haag's Theorem: Explain Free Field Nature
- lindberg
- · Replies 4 ·
Undergrad Understanding Planck's Quantum of Action for Beginners
- Hakimderubeis
- · Replies 4 ·
Matrices Often Used in Quantum Computing
- Ackbach
- · Replies 3 ·
Undergrad The CMB has a thermal black body spectrum
- Conn_coord
- · Replies 18 ·
Undergrad Polarization of photons quantum mechanically
- sol47739
- · Replies 3 ·
High School Understanding Waves, Particles and Probabilities
- geordief
- · Replies 2 ·
Undergrad Does chaos amplify inherent quantum level randomness?
- Physicist248
- · Replies 39 ·
Undergrad Experimenting with Spinor Rotations & Sign Changes
- wnvl2
- · Replies 1 ·
Undergrad Operators in finite dimension Hilbert space
- Sebas4
- · Replies 7 ·
Graduate What are the basic mathematical objects in QFT?
- snoopies622
- · Replies 7 ·
Undergrad How does one compute the Fourier-Transform of the Dirac-Hamiltonian?
- PhysicsRock
- · Replies 6 ·
Different Kinds of Quantum Computing Measurement Operators
- Ackbach
- · Replies 2 ·
Undergrad Understanding No Energy Degeneracy in Sakurai's Quantum Mechanics
- euphoricrhino
- · Replies 2 ·
Graduate Realizing EIT with Pulsed Laser: Intensity, Duration & Frequency
- wangvivi
- · Replies 1 ·
Undergrad Where does the QM creation operator get its energy?
- joneall
- · Replies 29 ·
Undergrad Inner product - positive or positive semidefinite?
- dyn
- · Replies 21 ·
Undergrad The Wavefunction when Mass is Much Greater than Planck's Constant
- JohnH
- · Replies 21 ·
Undergrad Wondering why quantum entanglement occurs
- ebmg123
- · Replies 2 ·
Quantum Computing: Positive Operators are Hermitian
- Ackbach
- · Replies 2 ·
Undergrad Why is the SE better than the KG equation for a hydrogen atom?
- snoopies622
- · Replies 18 ·
High School Heisenberg's Uncertainty Principle and determinism
- riballoon
- · Replies 13 ·
High School Sinusoidal wave function of t and x
- Ennio
- · Replies 2 ·
Undergrad Vector operator acting on a ket gives a ket out of the state space
- Kashmir
- · Replies 11 ·
High School Positive Definite Cartan Matrices in Quantum Physics
- fresh_42
- · Replies 6 ·
Undergrad Bell's circuit beginner's question: Sampling alters, - what's normal?
- ndvcxk123
- · Replies 2 ·
Undergrad What is so compelling in the superposition theorem?
- jinto26
- · Replies 3 ·
Undergrad Inner and Outer Product of the Wavefunctions
- Dario56
- · Replies 8 ·
Undergrad Understanding Wave Function Probabilities for a Free Particle
- jjson775
- · Replies 25 ·
Undergrad Entanglement and FTL signaling in professional scientific literature
- Delta2
- · Replies 276 ·
Undergrad How does atomic absorption spectroscopy work
- Login
- · Replies 1 ·
High School The relationship between the particle, the wave and the field
- geordief
- · Replies 8 ·
Graduate Coherent quantization, the non-unitary case
- mitchell porter
- · Replies 5 ·
High School Is the probability of a quantum outcome ever zero such as with....
- CosmicVoyager
- · Replies 4 ·
Graduate Matrix representation of a unitary operator, change of basis
- Kashmir
- · Replies 1 ·
High School QM concept of photon.... still a bit of a mystery today?
- CPW
- · Replies 32 ·
Graduate Is there a lost information paradox for quantum physics?
- Heidi
- · Replies 16 ·
Graduate Question about stimulated Raman emission
- ure227922
- · Replies 2 ·
High School How does exchange of elementary particles result in a force?
- vcsharp2003
- · Replies 13 ·
Undergrad Questions about Franck-Condon principle
- Salmone
- · Replies 3 ·
Undergrad When and why does an electron emit a photon?
- Daniel Hendriks
- · Replies 15 ·
Graduate Probability flux integrated over all space is mean momentum?
- euphoricrhino
- · Replies 2 ·
Undergrad Trying to Understand the 1928 article by Raman on Nature
- Salmone
- · Replies 3 ·
Undergrad Understanding Spin States in 2D Vector Spaces
- robphippen
- · Replies 6 ·
Undergrad Doubt on Morse potential and harmonic oscillator
- Salmone
- · Replies 2 ·
Undergrad With chips having 2 nm transistors, are we at the end of Moore's Law?
- swampwiz
- · Replies 2 ·
Undergrad Counterfactual quantum computation on interferometer
- artis
- · Replies 1 ·
High School What is a non-local Hamiltonian?
- lindberg
- · Replies 20 ·
Undergrad Determining the Number of Points in the n-Space
- Dario56
- · Replies 16 ·
Graduate Can local conservation be verified experimentally?
- Demystifier
- · Replies 12 ·
Undergrad Has Google Truly Achieved Quantum Supremacy?
- bhobba
- · Replies 9 ·
Undergrad Definition of functional derivative
- PreposterousUniverse
- · Replies 4 ·
Graduate Quantum Properties of Quasi Static Electric Fields
- Javelin
- · Replies 1 ·
High School What sort of an experiment can refute QM or QFTs?
- MathematicalPhysicist
- · Replies 124 ·
Undergrad Is the Energy Expectation Value Always Real and Above a Minimum Potential?
- dyn
- · Replies 14 ·
High School Is the concept of "potential" just a mathematical model?
- zb23
- · Replies 21 ·
Undergrad Quantum computation and entropy
- antonantal
- · Replies 39 ·
High School Questions about the position of the particle
- SLSPS
- · Replies 6 ·
High School Why do subatomic particles change what they do when observed?
- curiosity1
- · Replies 3 ·
High School Shor's algorithm on a Google Sheet
- Bob Walance
- · Replies 13 ·
High School Is the Heisenberg Uncertainty Principle a result of measurement inadequacies?
- DesertFox
- · Replies 13 ·
Undergrad Interpreting ##A^{\mu}(x)|0\rangle## and ##\psi (x) |0\rangle##
- Ryder Rude
- · Replies 5 ·
Graduate What are the unusual absorption features observed in the EIT signal of 85Rb gas?
- wangvivi
- · Replies 1 ·
Undergrad Black hole singularity vs. quantum mechanics
- Jyrioffinland
- · Replies 6 ·
Graduate Current Status of Electromagnetic Triviality
- Son Goku
- · Replies 9 ·
High School Particle Function? Particle Equation?
- MevsEinstein
- · Replies 21 ·
Graduate In What Space Does Quantum Spin Take Place
- Hornbein
- · Replies 10 ·
Undergrad Partition function for continuous spectrum
- HomogenousCow
- · Replies 2 ·
Graduate Energy Levels and Wave Functions of Identical Particle Systems
- Rafaelmado
- · Replies 1 ·
Graduate Symmetry & Invariance of Pions: π+, π0, π− and Other Mesons Explained
- Rafaelmado
- · Replies 1 ·
Undergrad What happens to the other particle in an entanglement state?
- accdd
- · Replies 8 ·
Undergrad Can entanglement occur in distant galaxies according to NRQM and QFT?
- accdd
- · Replies 6 ·
Undergrad Majorana zero modes observed by Microsoft?
- atyy
- · Replies 2 ·
Undergrad Photon interference and beamforming
- antonantal
- · Replies 64 ·