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.
Threads
Undergrad How Does Negative Pressure Influence the Expansion of the Universe?
- RJ Emery
- · Replies 10 ·
High School View double slit from other end
- Samina
- · Replies 1 ·
High School "Test of wave function collapse suggests gravity is not the answer"
- StevieTNZ
- · Replies 3 ·
High School Does the Higgs Boson really have 0 spin?
- jwb44
- · Replies 4 ·
High School Are electronic transitions a result of a single photon?
- Maurice Morelock
- · Replies 6 ·
Undergrad Why Does Spin Down Have Lower Energy Than Spin Up in a Magnetic Field?
- docnet
- · Replies 2 ·
Undergrad Are Different Charged Gluons Repulsive in the Gluon-Gluon Four-Point Vertex?
- simplemind
- · Replies 5 ·
Undergrad Problem with Commutator of Gauge Covariant Derivatives?
- tomdodd4598
- · Replies 8 ·
Undergrad Does wave function collapse change the Coulomb potential?
- Mayan Fung
- · Replies 10 ·
Graduate Does photon energy apply to excitation timescales shorter than one second?
- Maurice Morelock
- · Replies 1 ·
Undergrad Optical spectrum analyzer related
- chisuma
- · Replies 3 ·
Graduate Why is 4-Momentum Conserved in Quantum Field Theory?
- Jamister
- · Replies 1 ·
Undergrad Is London depth in superconductors analogous to skin depth?
- iVenky
- · Replies 2 ·
High School Does measurement affect entangled particles separated by light-minutes?
- KingGambit
- · Replies 5 ·
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 ·