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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Graduate QFT Overview for Soon-to-be Students
- newbee
- · Replies 6 ·
Undergrad How we can find wavelength of a wavepacket?
- yellowgold
- · Replies 1 ·
Undergrad What is the Wavelength of the Scattered Photon in a Collision?
- Damascus Road
- · Replies 3 ·
Graduate Maximum frequency and temperature relation in Wien's displacement law
- yellowgold
- · Replies 3 ·
Graduate Is there no cause and effect relationship in quantum mechanics?
- Ahmed Abdullah
- · Replies 3 ·
Graduate How does J_z act on the bra in a matrix element?
- KFC
- · Replies 4 ·
Undergrad Does energy of an electron tells anything about its orbital it's in?
- Chaste
- · Replies 12 ·
Graduate What Schrodinger Equation Describes
- musashi1029
- · Replies 2 ·
Undergrad Quantum cryptography and uncertainty relations
- Rich19
- · Replies 5 ·
Graduate Particle-only description of single-photon double-slit experiments
- Count Iblis
- · Replies 15 ·
Undergrad Spring Mass Model: What, How & Is There an Equation?
- yellowgold
- · Replies 5 ·
Graduate How does one emit a single photon?
- Greylorn
- · Replies 27 ·
Graduate Does wavelength affect the group velocity of a wave packet?
- yellowgold
- · Replies 1 ·
Graduate Learning Conformal Field Theory after QM
- jasonwer
- · Replies 12 ·
Graduate State Tomography: Least Pairs Needed?
- Dragonfall
- · Replies 7 ·
Graduate Dispersion Relation: What is it for Photons?
- yellowgold
- · Replies 7 ·
Graduate How is particle delocalization experimentally verified?
- intervoxel
- · Replies 2 ·
Graduate How much is known about ~x^4 potential
- jostpuur
- · Replies 2 ·
Graduate Electron double slit experiment in bubble chamber
- sai2020
- · Replies 2 ·
Graduate Why do spin observables Sx, Sy and Sz correspond to different Pauli matrices?
- intervoxel
- · Replies 1 ·
Graduate Does quantum immortality prove life after death?
- hadeka
- · Replies 29 ·
Graduate Irreducible tensor (second or higher rank)
- ala
- · Replies 1 ·
Graduate What Is the Bohr-van Leuven Theorem and Its Significance in Quantum Mechanics?
- Heirot
- · Replies 1 ·
Graduate Electron wave function collapse
- phil ess
- · Replies 4 ·
Graduate Quantum Annoyance (EPR and Bell's Inequality related).
- Bible Thumper
- · Replies 32 ·
Graduate Why use direct product construction in quantum mechanics?
- KFC
- · Replies 9 ·
Graduate Measuring angular momentum in atomic systems
- pellis
- · Replies 7 ·
Graduate Measuring a superposition of harmonic oscillator energy eigenstates
- daveyman
- · Replies 2 ·
Graduate Electron in potential well equation
- AmyJ
- · Replies 7 ·
Graduate Explicitly Deriving the Delta Function
- dsr39
- · Replies 5 ·
High School Build a Solar Panel with TIO2 for Your Science Fair Project
- grade10
- · Replies 2 ·
Graduate Infinite vs Finite potential well
- Nick89
- · Replies 10 ·
High School Where do electrons go while making a quantum jump?
- todd
- · Replies 29 ·
Graduate Solution of 1D Schrodinger using discretized hamiltonian
- beady
- · Replies 5 ·
Graduate Why continuous random fields instead of particles in quantum theory
- Peter Morgan
- · Replies 31 ·
Graduate How can I reproduce the wavefront interference photon detector seen on Nova?
- davesplays
- · Replies 1 ·
Graduate Quantization of Color: Electrons Jump Between Orbits
- thenewmans
- · Replies 7 ·
Graduate Electron filmed for first time ever
- SF
- · Replies 7 ·
Graduate [Q]Degeneracy and Commutability
- good_phy
- · Replies 1 ·
Graduate How many of you guys accept quantum theory?
- Bible Thumper
- · Replies 9 ·
Graduate What Sparked the Concept of Quantum Tunneling and How is it Proven?
- Prologue
- · Replies 8 ·
Graduate Heuristic explanation of quantum entanglement
- Glenns
- · Replies 12 ·
Graduate What does it mean to find eigenvectors of some operator in some basis?
- KFC
- · Replies 7 ·
Graduate Are Eigenfunctions and Eigenstates Just Eigenvectors?
- quasar_4
- · Replies 2 ·
Graduate Does Observing the Double Slit Collapse the Wave Function?
- ourben
- · Replies 8 ·
Graduate Is Quantum Mechanics Coherent?
- jomoonrain
- · Replies 15 ·
Graduate Angular momentum conversion in high-energy Compton scattering
- gremezd
- · Replies 1 ·
Graduate Yang-Mills Geometry: An Explainer for Simpletons
- QuarkHead
- · Replies 1 ·
Graduate Confuse about the spin and pauli matrices
- KFC
- · Replies 4 ·
Graduate Dirac equation with gamma_5 mass term?
- Hyperreality
- · Replies 5 ·
Undergrad Dual Slit Experiment: Detecting Photons/Particles?
- jimcave
- · Replies 2 ·
Graduate Does Decoherence and Entropy Relate to the Second Law of Thermodynamics?
- Bockhorst
- · Replies 103 ·
Graduate What does it mean anharmonic frequency ?
- noi_tseuq
- · Replies 1 ·
Graduate Does the Hamiltonian always give the total energy in quantum mechanics?
- Barny
- · Replies 4 ·
Graduate [Q]Some confusing about Dirac Delta Function
- good_phy
- · Replies 4 ·
High School Create a DIY Quantum Mechanics Experiment with Debit Cards and a Laser Pointer
- hl_world
- · Replies 6 ·
Graduate Problematic derivations of Noether's theorem
- ismaili
- · Replies 12 ·
Graduate Schrödinger's cat - I don't get it
- cosmic_tears
- · Replies 3 ·
Graduate Difference between wavepacket and wavefunction
- Alice Jin
- · Replies 6 ·
Graduate How dangerous is matter/antimatter collisions?
- 39ster
- · Replies 4 ·
Graduate Detecting Macroscopic Entanglement With the Bell Inequality
- michael879
- · Replies 6 ·
Graduate What could explain the asymmetry between matter and antimatter in the universe?
- michael879
- · Replies 7 ·
Graduate Why Were Gauges Introduced in Modern Physics Theories?
- White Ink
- · Replies 4 ·
Graduate Why do we need wavepackets?
- Alice Jin
- · Replies 6 ·
Graduate Constructing Hamiltonian Matrix from Sz Basis States for Quantum Spin Chains
- lamikins
- · Replies 3 ·
Graduate Why is the initial wavefunction equal to the spatial part in the time-independent case?
- soul
- · Replies 5 ·
Graduate Symmetry factors for Feynman diagrams
- Jessica_S
- · Replies 2 ·
Graduate Zero-Point Energy Manipulation
- Mr. Freeman
- · Replies 4 ·
Graduate Gaussian wave packet on a string with changing mass density
- h0dgey84bc
- · Replies 2 ·
Graduate Commutator in QM vs. Lie brackets in DG
- mhazelm
- · Replies 24 ·
Graduate Information Preservation in Quantum Gravity
- Lawrence B. Crowell
- · Replies 42 ·
Undergrad Why does a black body never turn green when heated?
- fluidistic
- · Replies 3 ·
Graduate How many elementary particles have been discovered?
- aman.yash
- · Replies 4 ·
Graduate Schrödinger equation where V = |x|
- ledamage
- · Replies 7 ·
Graduate Particles that already exist become entangled
- NJV
- · Replies 3 ·
Graduate [Q] square of 'sinc function' integral
- good_phy
- · Replies 1 ·
Graduate What represents a quantum bit in a physical system?
- cam875
- · Replies 14 ·
Graduate What Are the Best Resources for Researching SIC-POVMs?
- Kreizhn
- · Replies 1 ·
Graduate How can two quantum particles collide if their wave functions just superpose?
- wofsy
- · Replies 15 ·
Graduate Goldstein schodinger's equation Lagragian problem.
- Peeter
- · Replies 5 ·
Graduate [Q]Momentum eigenstate normailization
- good_phy
- · Replies 4 ·
High School Why can't you simultaneously measure position and momentum of an electron?
- tundra
- · Replies 18 ·
Graduate Type I PDC crystals and the EPR element of reality paradox
- DrChinese
- · Replies 36 ·
High School What is the closure rule in quantum mechanics?
- evidenso
- · Replies 3 ·
Graduate Why Wave Functions Use Complex Exponentials vs Trigonometric Functions
- redtree
- · Replies 8 ·
Graduate Does a tunneling particle follow a path through the barrier?
- jimmy.neutron
- · Replies 18 ·
Graduate Velocity operator inconsistency and discrete particle
- Frostal
- · Replies 1 ·
Graduate Scattering and bound states
- Niles
- · Replies 4 ·
Graduate Quantum Physics and the Pensions Crisis
- Count Iblis
- · Replies 1 ·
Graduate Superposition of eigenstates in QM
- mhazelm
- · Replies 3 ·
Graduate Commuting creation and annihilation operators
- Rettaw
- · Replies 2 ·
Graduate The state of a particle changes when viewed
- WhoShot
- · Replies 2 ·
Graduate Is Space and Time Truly Nonexistent at the Subatomic Level?
- Mad1kas
- · Replies 4 ·
Graduate Quantum potential energy exchange in Hiley's Bohmian trajectory analysis
- olcay
- · Replies 16 ·
Graduate Dirac Delta Function Explained: Simplified for M.S Students
- maximummman
- · Replies 16 ·
Graduate Is friction a quantum phenomenon at the atomic level?
- Benzoate
- · Replies 2 ·
Graduate Can Quantum Computers Use Alternatives to Qubits for Entanglement?
- LaserMind
- · Replies 2 ·
Graduate Entanglement spooky action at a distance
- Dragonfall
- · Replies 197 ·
Graduate How do RMS and uncertainty relate in Gaussian wavepackets?
- thegaussian
- · Replies 4 ·
Graduate Do all particles have both wave and particle properties?
- cam875
- · Replies 20 ·