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
Graduate Kraus Matrices and Unitary Matrix
- Henriamaa
- · Replies 1 ·
Graduate What is the difference between strong force and residual strong force?
- abi.ayan
- · Replies 1 ·
Graduate Which of these statements about tensor products is incorrect?
- nomadreid
- · Replies 3 ·
Graduate What do we mean when we say a particle is 'observed'?
- chestycougth
- · Replies 1 ·
Graduate Quantum Zeno effect for position measurement
- James MC
- · Replies 9 ·
Graduate Quantum Harmonic Oscillator necessary DE
- mjlist16
- · Replies 6 ·
Graduate Quantum Resonant Harmonic Oscillator
- rbwang1225
- · Replies 1 ·
Graduate What can we say about Bell theorem?
- ndung200790
- · Replies 17 ·
Graduate What is the Role of Fine Tuning in the Cosmological Constant Problem?
- geoduck
- · Replies 3 ·
Undergrad Energy of photons vs classical physics energy
- PBTR3
- · Replies 3 ·
Graduate Creation, annihilation and motion
- Kyleric
- · Replies 1 ·
Graduate Is there an analytical way to get average energy of a Fermi-Dirac gas?
- seflyer
- · Replies 5 ·
Graduate Double slit superposition vs Entanglement superposition
- San K
- · Replies 8 ·
Graduate Should |<A|B>|^2 always be interpreted as probability?
- nomadreid
- · Replies 21 ·
Graduate Third Loophole Against Entanglement Eliminated
- Charles Wilson
- · Replies 75 ·
Graduate Proving Completeness Relation for Box Normalization
- geoduck
- · Replies 15 ·
Graduate The difference between the packet length and the cohererence length
- zrek
- · Replies 8 ·
Graduate What happens after Compton scattering event?
- mitch_1211
- · Replies 5 ·
Graduate Infinities and short distances in QFT
- geoduck
- · Replies 2 ·
Graduate Calculating Correlation of Composite Operators
- geoduck
- · Replies 3 ·
Graduate Relation between actual measurement and Mathematical observables
- MHD93
- · Replies 2 ·
Graduate Can the 'mass' of bound states show up full propagator?
- center o bass
- · Replies 3 ·
Graduate Scholarpedia article on Bell's Theorem
- ttn
- · Replies 565 ·
Graduate Double-slit quantum eraser: measured patterns on screen
- msumm21
- · Replies 1 ·
Graduate How to determine quantum numbers for beta functions?
- lonewolf219
- · Replies 5 ·
Graduate Uncertainty Principal: Limit of measurement, or the nature of things
- coktail
- · Replies 2 ·
Graduate Causation between states or only between measurements?
- nomadreid
- · Replies 2 ·
Graduate Can Nature take exact random samples?
- Stephen Tashi
- · Replies 24 ·
Graduate Schroedinger's Apple: A Quantum Flux Dessert
- t_siva03
- · Replies 1 ·
Graduate Entanglement swapping - any correlation between previous partners?
- San K
- · Replies 8 ·
Graduate Why there is parity Symmetry ?
- Septim
- · Replies 12 ·
Graduate Understanding the Quantum Zeno Effect (QZE)
- James MC
- · Replies 3 ·
Undergrad Why we find expectation value?
- rida
- · Replies 1 ·
Graduate Optoelectronics: Dark current caused by Quantum fluctuations?
- Teichii492
- · Replies 2 ·
Graduate What it means the theory violates unitarity
- Mesmerized
- · Replies 10 ·
Graduate Does an observable have to be represented by a self-adjoint operator?
- StarsRuler
- · Replies 6 ·
Graduate What is meant by being driven by quantum fluctuations in QPTs
- RickvB
- · Replies 1 ·
Graduate Quantum Mechanics: Uncertainty Principles & Superposition
- nomadreid
- · Replies 10 ·
Graduate The Schmidt Decomposition: Looking for some intuition
- McLaren Rulez
- · Replies 8 ·
Graduate Blackbody radiation and the Ultraviolet Catastrophe
- Jimmy87
- · Replies 5 ·
Undergrad Magnetic Quantum Number Explained: Limits and Importance in Hydrogen Atom
- jbar18
- · Replies 9 ·
Graduate Does Quantum Mechanics Explain the Fuzziness in Light Reflection?
- MikeGomez
- · Replies 4 ·
Graduate Product rule of derivative of expectation values
- jonnaraev
- · Replies 6 ·
Graduate Can the Two Slit Experiment Be Conducted Without Observer Influence?
- pcfun
- · Replies 1 ·
Graduate Question About State Collapse and Energy Measurements in Infinite Well
- Jilvin
- · Replies 4 ·
Graduate Interaction of e.m radiation: from classical to quantum behavior
- Gruxg
- · Replies 3 ·
Graduate Derivative of Lagrangian with respect to momentum
- geoduck
- · Replies 6 ·
Graduate Photons Impact on the Visual Process
- iowahawk43
- · Replies 7 ·
Graduate Heaviside Step Potential - Tunneling
- klawlor419
- · Replies 3 ·
Graduate Does the Ward identity rescue a zero photon mass?
- center o bass
- · Replies 4 ·
Graduate What is ↔ mean? in commutation relation?
- rar0308
- · Replies 3 ·
Graduate Self energy logarithmic divergence due to chiral symmetry.
- center o bass
- · Replies 7 ·
Graduate Why the magnetic moment is zero for occupied levels?
- hokhani
- · Replies 6 ·
Graduate Blackbody radiation - quantum to classical
- spaghetti3451
- · Replies 1 ·
Graduate Why is the fine structure constant what it is?
- wotanub
- · Replies 10 ·
Graduate Why does dimensional regularization respect the Ward identity?
- center o bass
- · Replies 2 ·
Graduate Spacetime displacement operator in QFT
- Loro
- · Replies 11 ·
Graduate Creation Operators application
- lonewolf219
- · Replies 12 ·
Graduate Photon behavior after the polarizer
- San K
- · Replies 8 ·
Graduate Quantum mechanics and quantum field theory application ideas?
- erkant
- · Replies 3 ·
Graduate What grade of decoherence to be a classical aparatus
- StarsRuler
- · Replies 4 ·
Undergrad I do not understand Variable density
- Acadeus
- · Replies 2 ·
Graduate Hilbert Space in Quantum Mechanics
- klen
- · Replies 2 ·
Graduate Bitcoin Encryption and Quantum Computers (D-Wave)
- FallingMan
- · Replies 2 ·
Graduate How long do we need to wait for Quantum Computers?
- nowhat
- · Replies 3 ·
Graduate Experimental verification of indistinguishability for free particles?
- nonequilibrium
- · Replies 2 ·
Graduate Explain Energy Level Split for Two Atoms
- anhnha
- · Replies 1 ·
Graduate Operator equations vs. field equations
- mpv_plate
- · Replies 3 ·
Graduate Wavefunction after position measurement
- MHD93
- · Replies 3 ·
Graduate Relation between bare and full scalar booson propagator.
- center o bass
- · Replies 1 ·
Graduate What is common theme between U(1) SU(2) and SU(3)
- lonewolf219
- · Replies 8 ·
Graduate Does a stationary electron have a magnetic field?
- falcon32
- · Replies 2 ·
Graduate Quantum tunnelling/alpha decay
- tmv3v
- · Replies 3 ·
Graduate Is Quantum Experiment Randomness a Result of Incomplete Knowledge?
- rajeshmarndi
- · Replies 1 ·
Graduate Are subatomic movements random
- susskind99
- · Replies 12 ·
Graduate Are wavefunctions specifically describing electrons?
- lonewolf219
- · Replies 8 ·
Graduate The radial probability density for the hydrogen ground state
- ftr
- · Replies 9 ·
Graduate Superposition of macroscopic position states
- StarsRuler
- · Replies 1 ·
Graduate Quantization of hamiltonian with complex form
- Nixom
- · Replies 1 ·
Graduate Can Inertia Affect the Shape of Electron Clouds in Accelerating Ions?
- ravisastry
- · Replies 2 ·
High School What is the 4th dimension and why is it so intriguing?
- tg22542
- · Replies 5 ·
Graduate Communication by means of entanglement for the layman
- Demos Mirak
- · Replies 8 ·
Graduate Ladder operator for harmonic oscillator, I don't get a mathematical
- fluidistic
- · Replies 3 ·
Graduate How Should We Think About Quantum Mechanics?
- AlfieD
- · Replies 8 ·
Graduate QED Interaction Lagrangian with two different fermions
- lfqm
- · Replies 4 ·
Graduate Feynman diagrams - electrical charges
- Camille
- · Replies 4 ·
Graduate Angular momentum operators as infinitesimal generators
- Yoran91
- · Replies 1 ·
Graduate Why does Quantum Mechanics have objective statistical characteristic?
- ndung200790
- · Replies 3 ·
Graduate Is the Spin Orbit Hamiltonian really Hermitian?
- maverick280857
- · Replies 6 ·
Graduate Why quantum effects disappear at the classical level
- g.lemaitre
- · Replies 68 ·
Graduate Is destruction of dbl-slit interference pattern wavefunction collapse?
- andrewkirk
- · Replies 10 ·
Graduate Replacing an operator of an angular momentum for a constant.
- 71GA
- · Replies 2 ·
Undergrad Is the Non-relativistic Schrodinger Equation the right one?
- gmehra
- · Replies 2 ·
Graduate Hydrogen Atoms under Magnification (paper)
- DennisN
- · Replies 1 ·
Graduate A question about Dirac equation.
- ndung200790
- · Replies 4 ·
Graduate The cause of particle going through one slit of the other
- susskind99
- · Replies 6 ·
Graduate Pauli spin matrices and hbar/2
- lonewolf219
- · Replies 7 ·
Undergrad Electromagnetic radiation and photons
- Saado
- · Replies 5 ·
Graduate Callan-Symanzik equation and the running coupling.
- center o bass
- · Replies 1 ·
Undergrad Undergraduate-level explanation of Dirac Equation?
- lizzie96
- · Replies 7 ·