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 Explicit expressions for creation/annihilation operator of the free scalar field
- masudr
- · Replies 2 ·
Graduate Can you calculate atomic dimensions from proton and neutron counts?
- nuby
- · Replies 5 ·
Graduate Does the State Vector in Quantum Mechanics Move at the Speed of Light?
- Usaf Moji
- · Replies 7 ·
Graduate Commutator relations for the Ehrenfest Theorem
- tommy01
- · Replies 2 ·
Graduate Deriviation of WKB approximation
- Repetit
- · Replies 5 ·
Graduate Klein-Gordon Momentum Question
- div curl F= 0
- · Replies 4 ·
Graduate Calculate Effective Action in Quantum Field Theory
- Lepton_vn
- · Replies 1 ·
Graduate Was the particle in the semibox where it was found after the barrier was inserted?
- bg032
- · Replies 11 ·
Graduate How can a photon have momentum without mass?
- Ed Aboud
- · Replies 7 ·
Graduate Can Scale Relativity Bridge Quantum Mechanics and General Relativity?
- peter0302
- · Replies 16 ·
Graduate Can Bell's theorem escape proof by negation and locality assumptions?
- krimianl99
- · Replies 129 ·
Graduate Does Planck time affect the fundamental theorem of calculus?
- duffbeerforme
- · Replies 1 ·
Graduate Information Paradox confirmed?
- vincentm
- · Replies 3 ·
Graduate Why equal-time commutators in QFT instead of space-time commutators
- pellman
- · Replies 10 ·
Undergrad Understanding Vacuum Photocell: Explanation, Polarities, and Cut-off Potential
- Karimz
- · Replies 7 ·
Graduate Can expectation value of observables be imaginary?
- Raze2dust
- · Replies 25 ·
Graduate Why Can Electrons Tunnel Through Finite Barriers but Not Infinite Wells?
- ZeroScope
- · Replies 17 ·
Graduate How does Mandl & Shaw's Moller scattering formula give four terms?
- jdstokes
- · Replies 2 ·
Undergrad Atomic Isolation: Conditions for Line Spectra
- Icetray
- · Replies 1 ·
Graduate Does the de Broglie wave amplitude depend on the Lorentz factor?
- ben_trovato
- · Replies 1 ·
Graduate Coleman's QFT lectures on video
- Icosahedron
- · Replies 1 ·
Graduate Energy changes of a particle tunneling through a barrier
- james1001
- · Replies 1 ·
Graduate Is it possible to determine if a photon is entangled?
- ACG
- · Replies 1 ·
Graduate What is density matrix of one on two entangled qubits?
- Dims
- · Replies 1 ·
Graduate Potential commutes with position?
- syang9
- · Replies 8 ·
Graduate Renormalization - a dippy process - R. Feynman
- Buckeye
- · Replies 52 ·
Undergrad Links Between Electromagnetic, Electro Static and Gravitational Fields?
- WARLORDTF
- · Replies 7 ·
Graduate Clone Non-Orthogonal Quantum States - Violate No-Cloning Theorem
- Dragonfall
- · Replies 6 ·
Graduate Planck's constant and the matter constituents
- redtree
- · Replies 3 ·
Graduate Solving the Massless Klein Gordon Equation
- bartadam
- · Replies 9 ·
Graduate Lagrangian Gauge Transformation Q
- div curl F= 0
- · Replies 3 ·
Graduate Progressive collapse of photon number in a cavity field
- marcus
- · Replies 1 ·
Graduate The speed of light as an absolute max
- todosony
- · Replies 3 ·
Graduate Is a squeezed state keeping as a squeezed state in its evolution?
- wdlang
- · Replies 2 ·
Your favourite quantum phycisists and why?
- confusedashell
- · Replies 26 ·
Graduate Does Quantum Tunneling Explain Electron Positioning in Atomic Orbitals?
- Buckeye
- · Replies 9 ·
Graduate Electron Precession versus Proton Precession in a Magnetometer?
- xerxes73
- · Replies 1 ·
Graduate Annihilation, perhaps a defination problem
- Hevonen
- · Replies 4 ·
Graduate Can Electromagnetic Radiation Create Sound?
- bockerse
- · Replies 3 ·
Graduate Does light's timelessness explain the delayed-choice quantum eraser?
- Ian Davis
- · Replies 2 ·
Graduate Possible Explanation for Quantum Mechanics?
- Fizzicist
- · Replies 2 ·
Graduate E=hw law for the energy of photons
- I_wonder
- · Replies 2 ·
Graduate Is the E=hw Law for Photons Infallible?
- I_wonder
- · Replies 1 ·
Graduate Why Does Neutron Precess Despite q=0?
- joex444
- · Replies 4 ·
Graduate Equation calculating the amplitude of a particle
- Crazy Tosser
- · Replies 4 ·
Graduate What are some examples of systems with time-dependent Hamiltonians?
- diegzumillo
- · Replies 1 ·
Graduate Quantum Teleportation: Explaining Quantum State, Opposite Phase & Entanglement
- DecliningTech
- · Replies 2 ·
Graduate What is the semiclassical regime and when does it apply?
- xylai
- · Replies 2 ·
Graduate What is the Dirac form used for in quantum mechanics?
- johanjones190
- · Replies 4 ·
Graduate Potential well with two electrons
- monish
- · Replies 3 ·
Graduate How do classical and quantum mesh?
- Cocacolacan
- · Replies 3 ·
Graduate How does classical fail in here
- atom888
- · Replies 25 ·
Graduate Helicity operator commutation with Dirac Hamiltonian
- jdstokes
- · Replies 5 ·
Graduate What is the significance of complementarity in understanding quantum mechanics?
- nowaywarrior
- · Replies 3 ·
Graduate Is nature fundamentally random or merely unpredictable?
- pellman
- · Replies 64 ·
Graduate What is the electric field around a quantum particle?
- Starbug
- · Replies 1 ·
Graduate Klein-Gordon Approximation Question
- div curl F= 0
- · Replies 4 ·
Graduate Lagrange multiplier for bose- Einstein stats
- siresmith
- · Replies 1 ·
Graduate Back Correcting the Uncertaininty Principle?
- bstacey
- · Replies 3 ·
Graduate Is Quantum Theory's Assumptions More Flawed Than Bell's?
- Hydr0matic
- · Replies 45 ·
Graduate Quantum Physics for a portable game console
- vincentm
- · Replies 1 ·
Graduate The expectation of 'z' and 'x+iy'
- vertices
- · Replies 4 ·
Graduate Schwinger Quantum action
- mhill
- · Replies 1 ·
Graduate How does filtering affect the coherence length of white light?
- tomasko789
- · Replies 4 ·
Graduate Can Zero Point Energy Be a Viable Alternative Energy Source?
- Chaos' lil bro Order
- · Replies 13 ·
Graduate Interference between photons that never meet
- SF
- · Replies 7 ·
Graduate Calculating the Inverse of Operator L in R^2
- Bimmel
- · Replies 2 ·
Graduate Order of Interference - 1st, 2nd, 4th - What Does It Mean?
- yefeiwen
- · Replies 2 ·
Graduate Do space and time arise from coupling spinorial structures?
- K S Mallesh
- · Replies 2 ·
Graduate Photon as composite of electron and positron
- K S Mallesh
- · Replies 3 ·
Graduate How Long Can an Atom Stay in an Excited State?
- Ahmed Abdullah
- · Replies 4 ·
Graduate Nonlocality - fact or fiction?
- confusedashell
- · Replies 107 ·
Graduate Physicists and their pet theories
- nonlocal
- · Replies 14 ·
Graduate Formalisms (in fidelity calculation for quantum teleportation)
- ssampak
- · Replies 1 ·
Undergrad Light Propulsion: Can Photons Move Objects?
- madmike159
- · Replies 2 ·
Graduate Why Do Different Terms Arising From An Electron Configuration Differ In Energy?
- Repetit
- · Replies 7 ·
Graduate About scattering and bound states
- luisgml_2000
- · Replies 2 ·
Graduate Is angular momentum always quantized?
- pellman
- · Replies 15 ·
Graduate Quantum Mechanics and Determinism
- IlyaZ
- · Replies 9 ·
Graduate Dirac equation and general covariance
- jdstokes
- · Replies 17 ·
Undergrad Can someone explain the idea of degeneracy of orbitals?
- eccles1214
- · Replies 1 ·
Graduate Baker, Campbell, Hausdorff and all that
- lbrits
- · Replies 5 ·
Graduate Dual Gauge Curvature for U(1) and SU(3)
- lark
- · Replies 4 ·
Graduate Time translation in the heisenberg picture?
- pellman
- · Replies 19 ·
Graduate Pure Qubit Question: Does Alice Fulfill Bob's Demand?
- begyu85
- · Replies 2 ·
Graduate Berry phase in degenerare case
- wdlang
- · Replies 2 ·
Graduate Proving $\frac{d}{dt}\left\langle{XP}\right\rangle$ for Hamiltonian H
- bspoka
- · Replies 2 ·
Graduate Why does heated coal change color from red to white?
- bill nye scienceguy!
- · Replies 3 ·
Graduate Causal Evolution of Wave Function and Gravity
- dx
- · Replies 2 ·
Graduate Unitary transformation for spacetime translation of scalar fields
- jdstokes
- · Replies 4 ·
Graduate Is this the right place to discuss Bose Einstein condensate?
- scupydog
- · Replies 5 ·
Graduate Transition Probability for a Laser system
- Angelos K
- · Replies 4 ·
Graduate What would happen to pauli exclusion principle
- Bose
- · Replies 6 ·
Graduate Waveequation for relativistic particle
- salaric
- · Replies 3 ·
Graduate How Does the Heisenberg Uncertainty Principle Relate to Photon Polarization?
- judonight
- · Replies 2 ·
Graduate Uniqueness of quantization of Dirac field
- pxb
- · Replies 11 ·
Graduate Novikov self-consistency principle
- majiball
- · Replies 1 ·
Graduate Solve Mandl & Shaw 2.3: Prove Lorentz Condition
- jdstokes
- · Replies 3 ·
Graduate Dual of Maxwell tensor as gauge curvature
- lark
- · Replies 7 ·
Graduate Schwinger-Dyson equations for Quantum Gravity
- mhill
- · Replies 1 ·