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.
Sub-forums
Threads
Graduate Uncertainty principle and Wave-particle duality
- femi
- · Replies 4 ·
Graduate Two photons spontaneous emission (2s->1s)
- leviadam
- · Replies 11 ·
Graduate Quantum Tunneling Wave Packets: Explained
- junglebeast
- · Replies 42 ·
Graduate Can Quantum Computers Alter Gravity?
- redhedkangaro
- · Replies 1 ·
Graduate Double Slit Interference Pattern
- blumfeld0
- · Replies 22 ·
Graduate Are photons affected by the strong force? The weak force?
- potmobius
- · Replies 19 ·
Graduate Spin orbit coupling/orbital degeneracy
- granpa
- · Replies 15 ·
Graduate Does a single photon have a wavelength?
- feynmann
- · Replies 3 ·
Graduate Variation in action for modified EM Field Action
- maverick280857
- · Replies 2 ·
Undergrad Phonon Spectrum: Explained in Terms of Electromagnetic Spectrum
- ScienceNerd36
- · Replies 3 ·
Graduate Relation for Inner Product with States from a Complete Set
- tommy01
- · Replies 4 ·
Graduate Quatum Mechanics Explains Black Hole Jets
- rq704c
- · Replies 1 ·
Graduate What is the energy of the scattered photon?
- ZachWeiner
- · Replies 3 ·
Graduate Understanding the Breakdown of Path Integrals in Peskin
- malawi_glenn
- · Replies 3 ·
Graduate Does the EPR Paradox Break the Uncertainty Principle?
- honzik
- · Replies 4 ·
Graduate Can Entanglement Survive the Destruction of One Particle?
- Honorable_Death
- · Replies 8 ·
Graduate Threshold between macroscopic behavior of matter and quantum behavior
- frankinstein
- · Replies 2 ·
Graduate Explaining Particle Existing in l=0, s=3/2
- quantumdude10
- · Replies 3 ·
Undergrad Double slit experiment (one slit closed)
- Volcano
- · Replies 31 ·
Graduate Are Dirac Eigenstates Helicity Eigenstates?
- tirrel
- · Replies 2 ·
Undergrad Quantum mechanics replacing bohr model
- kashiark
- · Replies 9 ·
Graduate Step potential - question about reflection coefficient
- trelek2
- · Replies 2 ·
Graduate Classical spin of an electron?
- Peeter
- · Replies 29 ·
Graduate Position Operator: What's The Catch?
- Selectron
- · Replies 12 ·
Graduate Is the QM phase of a particle a coincidence in relativistic quantum mechanics?
- LarryS
- · Replies 4 ·
Graduate Plasmon Energy Storage: Limitations & Possibilities
- Stanley514
- · Replies 1 ·
Undergrad What+how makes higher energy photon has shorter in wavelength?
- AlienUFO
- · Replies 8 ·
Graduate I locating quantum entanglement experiments
- hurricane89
- · Replies 10 ·
Graduate Prerequisites for Learning Lagrangian Formalism in Quantum Field Theory
- live4physics
- · Replies 2 ·
Graduate A little notation help, on quantum coding
- monica1977
- · Replies 10 ·
Graduate Exploring the EPR Paradox: Reconciling QM and SR
- rjbeery
- · Replies 61 ·
Graduate NextNano3 simulation and some physics help
- ingeni
- · Replies 1 ·
Graduate Does the Quantum Eraser Experiment Disprove Local Hidden Variables?
- Thomas_K
- · Replies 2 ·
Graduate L-edge of Absorption Explained - Si L2,3 Edge at 99.8 eV
- DivGradCurl
- · Replies 2 ·
Graduate What is the maximum temporal resolution ever possible?
- philip041
- · Replies 1 ·
Undergrad Double Slit Question: Wave Behavior Explained
- benk99nenm312
- · Replies 12 ·
Graduate What are the problem We have in Quantum process
- markone2
- · Replies 2 ·
Undergrad Attraction and repulsion of e- and p+
- delplace
- · Replies 32 ·
Graduate What Does Kenneth W. Ford Mean by More Energetic Particles in The Quantum World?
- daisey
- · Replies 5 ·
Graduate What is the significance of the Dirac equation in understanding antimatter?
- Haibara Ai
- · Replies 5 ·
Undergrad Delta function & kronecker delta
- churi55
- · Replies 8 ·
Graduate Understanding Continuous Space, Spectra, and Planck Units in Quantum Spacetime
- denisv
- · Replies 1 ·
Graduate Eulers equation, i think? leonard suskin
- jerkazoid
- · Replies 3 ·
Graduate Quantum friction due to vacuum energy
- ballzac
- · Replies 3 ·
Graduate The Pauli-Lubanski vector for massless particles
- nrqed
- · Replies 15 ·
Graduate Is there any way to use quantum teleportation
- markone2
- · Replies 1 ·
Graduate BM/dBB and Entanglement, Non-contextuality
- DrChinese
- · Replies 22 ·
Graduate Expectation value of two annihilation operators
- Ancient_Nomad
- · Replies 1 ·
Graduate Zeemen Effet - having trouble understanding
- rabbit44
- · Replies 1 ·
Graduate Understanding the "Spin" Property of Particles
- mwalke46
- · Replies 5 ·
Graduate Can Scalar and YM Lagrangians Be Written Using Tetrads and Spin Connection?
- Dox
- · Replies 1 ·
Graduate BM, initial state and information
- Dmitry67
- · Replies 19 ·
Graduate Momentum transferred even though no collapse?
- jaketodd
- · Replies 19 ·
Graduate Off diagonal element of density matrix
- KFC
- · Replies 1 ·
Graduate Momentum eigenstates particle in box
- clacker
- · Replies 2 ·
Graduate Bohr's Radius: Is His Calculation Right?
- MonsieurWise
- · Replies 6 ·
Graduate Does Quantum Energy Measurement Involve Position Measurement?
- causalset
- · Replies 1 ·
Graduate The Quantum Theory Behind Lasers and Masers
- scupydog
- · Replies 9 ·
Undergrad Interactions between e-m radiation and matter.
- giuliopepe
- · Replies 5 ·
Graduate Finding eigenvalues of a Hamiltonian involving Sz, Sz^2 and Sx
- Physicslad78
- · Replies 7 ·
Graduate Can quantum entanglement violate the no hair theorem?
- Matterwave
- · Replies 4 ·
Graduate Schrodinger equation of a free particle in the rectilinear
- Tian WJ
- · Replies 1 ·
Graduate Photon-photon collision confusion
- jnorman
- · Replies 5 ·
Graduate Tadpole graph & normal ordering
- QuantumDevil
- · Replies 4 ·
Graduate Polyatomic quantum harmonic oscillator
- GOLDandBRONZE
- · Replies 3 ·
Graduate Angled electron reflection, coherency
- jaketodd
- · Replies 1 ·
Graduate Do Sound Waves Come in Quanta?
- ScienceNerd36
- · Replies 5 ·
Graduate Time operator, or Time eigenfunctions
- JohnSimpson
- · Replies 55 ·
Graduate Explanation of Yukawa potential
- wofsy
- · Replies 14 ·
Graduate Invariant of a helicoid, like an electron but not quite.
- Spinnor
- · Replies 3 ·
Undergrad Is Electron Spin Change Possible?
- physicsnewb7
- · Replies 20 ·
Undergrad Why do spectral lines only appear as a line?
- spaced out
- · Replies 2 ·
Graduate Peskin and Schroeder p. 20-21
- nicksauce
- · Replies 6 ·
Graduate Do particles know their destination before setting out?
- p764rds
- · Replies 2 ·
Graduate Alternative Feynman Diagram Calculation of Axial Anomaly
- Ian Lovejoy
- · Replies 3 ·
Graduate Multi-space instantaneous existence.
- David010101
- · Replies 1 ·
Graduate Changing The Shape of a potential well
- dsr39
- · Replies 2 ·
Graduate Density Operator: Probability of Transition |0,e> to |1,g>
- KFC
- · Replies 17 ·
Graduate What Are Vacuum Fluctuations and Their Interaction with the EM Field?
- sanjibghosh
- · Replies 8 ·
Graduate Frequency of light calculated from wavefunctions
- granpa
- · Replies 3 ·
Graduate Changing wavelength while preserving geometry?
- jaketodd
- · Replies 5 ·
Undergrad Negative and Complex Probability?
- WhiteRae
- · Replies 4 ·
Graduate The Hydrogen Atom: An Unique Case of Quantum Numbers
- albertsmith
- · Replies 5 ·
Undergrad Mirror Reflexion: Does Photon Remain Unchanged?
- live4physics
- · Replies 4 ·
Graduate What’s Dispersion got to do with Schroedinger?
- mysearch
- · Replies 2 ·
Undergrad EM radiation cross over materials
- live4physics
- · Replies 3 ·
Graduate Understanding the Energy Differences in Multielectron Atom States
- albertsmith
- · Replies 5 ·
Graduate Adding Spin S1 and S2: A Puzzling Situation
- dsr39
- · Replies 4 ·
Graduate Wall Street Journal on Entanglement
- DrChinese
- · Replies 6 ·
Undergrad What are orthogonal wavefunctions?
- lms_89
- · Replies 3 ·
Graduate Can quantum entangled particles be used for faster-than-light communication?
- Belzy
- · Replies 5 ·
Graduate Product state and orthorgonality
- KFC
- · Replies 2 ·
Graduate The probe passes over an atom that is 3.20×10^2 nm tall.
- albertsmith
- · Replies 4 ·
Graduate Explaining the Hydrogen Atom Wave Function Paradox
- albertsmith
- · Replies 2 ·
Undergrad Explaining the Uncertainty Principle
- vizzard
- · Replies 9 ·
Graduate Preparing a certain superposition of electron states
- thoughtgaze
- · Replies 1 ·
Graduate Is the vacuum the same as a quantum vacuum?
- redhedkangaro
- · Replies 5 ·
High School How Are Math and Science Interconnected?
- Matterwave
- · Replies 4 ·
Graduate Commutators of Lorentz generators
- nrqed
- · Replies 5 ·
Graduate What's the Difference Between Quantum and Simple Harmonic Oscillators?
- Thierry12
- · Replies 2 ·