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 How Does Spin-Orbit Coupling Affect Quantum Number Validity?
- kelly0303
- · Replies 14 ·
High School Sun powered by quantum tunneling - question
- brajesh
- · Replies 6 ·
Undergrad Exceptions to the postulate of equal a priori probabilities?
- AndreasC
- · Replies 4 ·
High School Reduced Planck Constant vs Dark Matter?
- jwb44
- · Replies 2 ·
Undergrad Time-dependence in the Hamiltonian
- Llukis
- · Replies 6 ·
High School Turbulence and Quantum Mechanical Probabilities
- Justice Hunter
- · Replies 7 ·
Undergrad Stimulated emission in harmonic oscillator
- kelly0303
- · Replies 4 ·
Undergrad Could Light Absorption Be Linked to Quantum Tunneling?
- The Baron
- · Replies 3 ·
Undergrad Derivation of Eigenfunctions/Eigenvalues of the Momentum Operator
- TRB8985
- · Replies 1 ·
Undergrad Double delta potential -- Degeneracy of bound states in one dimension?
- LagrangeEuler
- · Replies 3 ·
Undergrad Do I understand Bell's Inequality Test correctly?
- MichaelPower17
- · Replies 1 ·
Undergrad Do Entangled Quantum Particles Remain Aligned After Initial Preparation?
- rasp
- · Replies 40 ·
Undergrad Why is epsilon omitted in the Bohr model photon emission formula?
- AhmedHesham
- · Replies 10 ·
Undergrad Simulation of non-Hermitian quantum mechanics
- James Essig
- · Replies 6 ·
High School Energy needed for electron's change in energy level in an atom
- Nathi ORea
- · Replies 15 ·
High School Understanding Light Quantization
- brajesh
- · Replies 4 ·
Undergrad Interesting Scientific American article (The end of QM?)
- wittgenstein
- · Replies 46 ·
High School Which one is correct? (the Matrix or Wave formulation of QM)
- zoltrix
- · Replies 3 ·
Undergrad How to solve 2nd order TDSE for a Gaussian-kicked harmonic oscillator?
- skynelson
- · Replies 6 ·
Graduate Looking for experts on quantum chaos
- MathematicalPhysicist
- · Replies 26 ·
Undergrad What is the significance of the dispersion relation?
- patric44
- · Replies 5 ·
Undergrad Normalization of an Eigenvector in a Matrix
- Dwye
- · Replies 3 ·
High School Spin collapse in a magnetic field
- msumm21
- · Replies 17 ·
Undergrad Free electron path without a nearby proton
- Tareq Naushad
- · Replies 3 ·
Undergrad What does it mean for spins to be anti-phase with each other?
- docnet
- · Replies 6 ·
Undergrad Can a quantum system with internal memory be in an energy eigenstate?
- mephistomunchen
- · Replies 13 ·
High School How does energy interact with quantum particles?
- prax
- · Replies 10 ·
Graduate Renormalizability conditions for a real scalar field in d dimensions
- JD_PM
- · Replies 2 ·
Undergrad "Filming" a quantum measurement
- nomadreid
- · Replies 65 ·
Graduate Dimension of \lambda constant in \delta potential
- LagrangeEuler
- · Replies 2 ·
Undergrad An Alternative form of Bell's Inequality
- jambaugh
- · Replies 5 ·
Undergrad How does a particle's acceleration relate to the emitted photon?
- jactor
- · Replies 13 ·
High School Wave Function Collapse using faulty recording devices.
- Lexovix
- · Replies 7 ·
Undergrad Is the change in energy due to light-shift the same in all levels?
- ErezAgh
- · Replies 4 ·
Undergrad Question on circular polarization and the quantum eraser
- Erik Ayer
- · Replies 8 ·
Undergrad Does measurement probability in electron spin include the up-down outcome?
- rasp
- · Replies 48 ·
Undergrad Calc QED Charge Particle Repulsion/Attraction
- ILoveParticlePhysics
- · Replies 7 ·
Undergrad Are entangled particles really separated?
- chrisrp
- · Replies 23 ·
Undergrad Question on Harmonic Oscillator Series Derivation
- TRB8985
- · Replies 1 ·
High School Traveling wave solution notation
- baseballfan_ny
- · Replies 4 ·
Undergrad Quantum Tunneling in an STM: ELI5 Requested
- Jackissimus
- · Replies 3 ·
Undergrad Spontaneous parametric down-conversion entanglement using BBO
- Paul159
- · Replies 4 ·
High School Are photons entangled with a component of the atom that emitted them?
- Matthew-Champion
- · Replies 3 ·
High School Quantum info and its indestructability
- sayetsu
- · Replies 12 ·
High School Difference between circumflex and non-circumflex operators
- regory
- · Replies 5 ·
Undergrad Relation between blackbody radiation and spontaneous emission
- IcedCoffee
- · Replies 6 ·
Undergrad Constructive Interference of Light
- jactor
- · Replies 15 ·
Undergrad Do Interacting Bosons with Spin 2 Exist for Gluon-like Charges?
- reinhard55
- · Replies 5 ·
Undergrad Rabi Hamiltonian : counter-rotating terms
- Paul159
- · Replies 2 ·
Graduate The exciton dynamics in the FMO complex
- Ayoub EL-AMRANI
- · Replies 2 ·
Graduate Non-perturbative description of QFTs
- dx
- · Replies 6 ·
Undergrad Experimental realizatoin of sequential Stern-Gerlach's
- nicholas_eng
- · Replies 4 ·
Undergrad Functor between the category of Hilbert Space and the category of sets
- snypehype46
- · Replies 3 ·
High School Why do some textbooks divide expectation values by the norm integral?
- docnet
- · Replies 3 ·
Undergrad What is the Bloch-Siegert shift?
- Malamala
- · Replies 3 ·
Undergrad Understanding how to derive the Feynman rules out of the path integral
- JD_PM
- · Replies 33 ·
Graduate How can a mixed state particle absorb a "quanta" of energy?
- ForgetfulPhysicist
- · Replies 8 ·
Graduate Is there a symmetry in the Unruh effect?
- Heidi
- · Replies 23 ·
Undergrad To understand Bell's inequality
- mananvp
- · Replies 15 ·
High School How does a photon not "feel" electromagnetism?
- Marshall2389
- · Replies 19 ·
Undergrad Bell's Inequality => 4 entangled Photons impossible?
- ObjectivelyRational
- · Replies 1 ·
Undergrad Dimensionless vs. dimensional "constants"
- valenumr
- · Replies 20 ·
Undergrad How to work in the |F,m_F> states in hyperfine structure
- lelouch_v1
- · Replies 3 ·
Graduate Physically realizable planar graphs in amplituhedron approach
- nrqed
- · Replies 5 ·
Undergrad Physical parameters for spin 1/2 particles
- lazayama
- · Replies 5 ·
Undergrad Issue with wavenumber in the free particle wavefunction
- shankk
- · Replies 9 ·
Undergrad Simultaneous measurements of 1 observable
- Ghost Quartz
- · Replies 2 ·
Graduate Eigenvalues of Hyperfine Hamiltonian
- lelouch_v1
- · Replies 1 ·
Undergrad Is the classical relation between energy and momentum valid in QM?
- shankk
- · Replies 4 ·
Undergrad Different reference frames in QM
- BillKet
- · Replies 10 ·
Undergrad The Central Field Approximation for Many-Electron Atoms
- rtareen
- · Replies 4 ·
Undergrad Does the wave function spread more quickly after it is observed?
- Sciencemaster
- · Replies 32 ·
Graduate Wave Function Collapse and Thermodynamic Irreversible Processes
- hyksos
- · Replies 4 ·
Undergrad Classical Hayden-Preskill Randomizer
- vancouver_water
- · Replies 1 ·
Undergrad What does L=0 mean physically in the hydrogen atom?
- LagrangeEuler
- · Replies 2 ·
Graduate Heisenberg Uncertainty Relation for mixed states
- Jamister
- · Replies 6 ·
Undergrad General Magnetic Dipole Moment For an Electron in an Atom
- rtareen
- · Replies 10 ·
High School Entanglement with one photon at double-slit and detector on the other
- Egghead44
- · Replies 19 ·
Graduate Proton Precession in Hydrogen-Rich Liquids
- Anil Iype
- · Replies 3 ·
Undergrad Can two photons cancel each other?
- QuasarBoy543298
- · Replies 11 ·
High School Why does measuring a particle change its properties if the culture existed before study?
- bertrandrussell
- · Replies 27 ·
Undergrad Why doesn't measuring shared electrons break covalent bonds?
- EPR
- · Replies 8 ·
High School Photon absorption -- What happens to the excess energy?
- jeremyfiennes
- · Replies 12 ·
Undergrad Solving Schrödinger's equation for a hydrogen atom with Euler's method
- Tuca
- · Replies 2 ·
Undergrad Photon Emitted without Changing Energy Levels
- rtareen
- · Replies 8 ·
Undergrad Possible to derive geodesics from the wavefunction?
- Gotbread
- · Replies 1 ·
Graduate Why physicists cannot renormalize all divergent integrals?
- Anixx
- · Replies 8 ·
High School Does the energy of an electron vary in the sublevels?
- AdvaitDhingra
- · Replies 10 ·
Undergrad Intuitive/classical picture of electron spin g-factor of 2?
- AndreasC
- · Replies 5 ·
Undergrad 1D wavepacket scattering simulation, momentum distribution formula
- LucKy
- · Replies 24 ·
High School Is there a magnetic interaction between light and charged particles?
- jeremyfiennes
- · Replies 23 ·
High School The match rates in Bell Tests -- Lower than 50%?
- Cerenkov
- · Replies 28 ·
High School Does quantum electrodynamics apply to brain activity?
- Unbowed_epicure
- · Replies 4 ·
Undergrad Does block time resolve action at a distance in entanglement?
- InterestedParty
- · Replies 11 ·
Undergrad QED - running of coupling (beta function)
- tomdodd4598
- · Replies 5 ·
Undergrad Parity selection rules for linear and quadratic Stark effects
- kelly0303
- · Replies 1 ·
Graduate How Do Feynman Diagrams Work in Phi^4 Theory?
- Diracobama2181
- · Replies 1 ·
Undergrad Constant beam, both slits analyzed double-slit experiment?
- Kurt Mueller
- · Replies 6 ·
High School Does Quantum Eraser Prove That Intention Does Not Create Physical Reality?
- lashinko
- · Replies 8 ·
Undergrad Renormalisation scale and running of the φ^3 coupling constant
- tomdodd4598
- · Replies 1 ·