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 Why does xp give -i*hbar, not 0?
- leonmate
- · Replies 11 ·
Graduate Orbital Angular Momentum and Photon Energy
- jkg0
- · Replies 6 ·
Graduate Is prior information lost during/after entanglement?
- sanpkl
- · Replies 1 ·
Graduate If gravity is spacetime curvature, why do we need gravitons?
- L.Newton
- · Replies 19 ·
Graduate Envisioning Electron Wave Properties
- JFS321
- · Replies 6 ·
Graduate Can a bullet generate a wavefront in vacuum?
- luckis11
- · Replies 18 ·
Graduate Casimir Effect Force in a Collapsing Sphere
- nst.john
- · Replies 4 ·
Graduate Reconciling determinism in relativity with quantum indeterminacy
- Amaterasu21
- · Replies 3 ·
Graduate Is wave function a real physical thing?
- Nick V
- · Replies 150 ·
Graduate Is wave function a probability function of time?
- Quarlep
- · Replies 7 ·
Graduate BBC Jim Al-Khalili Presentation -- robin bird eyes use quantum entanglement?
- Edward Wij
- · Replies 10 ·
Graduate Does Particle Spin Refer to Rotation?
- Dmoore1991
- · Replies 16 ·
Graduate How does measuring one entangled photon affect the other?
- SpookyAction
- · Replies 24 ·
Graduate Diagonalizabilty versus spread for uncertainty (discrete)
- nomadreid
- · Replies 2 ·
Graduate Group and Quantum Field Theory
- Calabi
- · Replies 8 ·
Graduate Understanding Faithful Measurement in Quantum Mechanics
- omidaut
- · Replies 3 ·
Undergrad How to overcome the drawback of rutherford's model?
- Hardik Batra
- · Replies 11 ·
Graduate What is the significance of Bell's Inequality Theorem in quantum mechanics?
- name123
- · Replies 5 ·
Graduate Double Slit Experiments with Electrons
- Marceli
- · Replies 16 ·
Graduate Do spin-1/2 eigenvalues +1 and -1 correspond to up and down states?
- space-time
- · Replies 5 ·
Graduate Physical meaning of the Feynman slash
- FredMadison
- · Replies 2 ·
Graduate How Does the Momentum Operator Act in the Matrix Element <pm|p|pn>?
- nigelscott
- · Replies 9 ·
Graduate Quantum Computing with Zero Spin Atoms?
- testingus
- · Replies 1 ·
Graduate Thinking about the Schrodinger wave equation
- Ahmad Kishki
- · Replies 6 ·
Graduate Qubits, 2 complex numbers, forcing one to real
- Elroy
- · Replies 5 ·
Graduate How Does the Two Slit Experiment Illustrate Quantum Duality?
- mainliner
- · Replies 44 ·
Graduate Why does photoelectric emission not depend on intensity?
- PWiz
- · Replies 14 ·
Graduate Time-dep Hamiltonian commute with time evolution?
- "pi"mp
- · Replies 9 ·
Graduate Modern textbooks on axiomatic quantum field theory
- pellman
- · Replies 5 ·
Graduate Meaning of Commutation Relation
- A Dhingra
- · Replies 3 ·
Graduate Wigner-Eckart theorem in Stark effect
- Goddar
- · Replies 1 ·
Graduate What Is the Difference Between SDD and Stuttgart Pseudopotential?
- hiltac
- · Replies 5 ·
Graduate Renormalization question in phi^4 theory
- copernicus1
- · Replies 5 ·
Graduate Creating radiowave entangled photons
- Ponderer
- · Replies 35 ·
Graduate Equivalence of waveparticle duality to uncertainty principle
- Ahmed Abdullah
- · Replies 1 ·
Graduate Polarization of an emitted photon
- naima
- · Replies 3 ·
Graduate Does reality exist before we measure it?
- Nick V
- · Replies 12 ·
Graduate Mathematical Explanation of One partice in two place
- Quarlep
- · Replies 9 ·
Graduate Finite and infinite unitary transformation
- wasi-uz-zaman
- · Replies 1 ·
Graduate Creating a Laser with Different Types of Radiance
- hiltac
- · Replies 7 ·
Graduate Counterterms in saddle point expansion
- geoduck
- · Replies 2 ·
Graduate Momentum operator eigenfunction
- blue_leaf77
- · Replies 7 ·
Graduate ? connection between uncertainty and wave-particle duality
- Steve H
- · Replies 1 ·
Graduate Does field quantization require a cavity?
- wasi-uz-zaman
- · Replies 1 ·
Graduate How do physicists know wave function extends to infinity?
- Nick V
- · Replies 7 ·
Graduate Calculate Quantum Mechanics: The Way
- mac_alleb
- · Replies 3 ·
Graduate What's the main logic behind Feynman's path integral formulation?
- Quarlep
- · Replies 15 ·
Graduate Confusion over quantum mechanics operators
- Ahmad Kishki
- · Replies 17 ·
Graduate Question re: photon interference
- sanpkl
- · Replies 1 ·
Graduate Can psi be epistemic while still treating particles as real?
- Nick V
- · Replies 56 ·
Graduate Feynman rules - where do the imaginary numbers come from?
- guest1234
- · Replies 3 ·
Graduate A festive analogy for interpreting quantum mechanics
- Paulibus
- · Replies 5 ·
Graduate Coherence in density matrix formalism
- HJ Farnsworth
- · Replies 3 ·
Graduate Derivations for Schrodinger's equations for potential step
- space-time
- · Replies 4 ·
Graduate Bjorken Drell derivation - Lorentz transformation
- Maybe_Memorie
- · Replies 3 ·
Undergrad How do electrons orbit the nucleus?
- Nick V
- · Replies 12 ·
Graduate Could electron scatter off vacuum fluctuations?
- asya
- · Replies 4 ·
Graduate Kinetic energy in quantum mechanics
- Ahmad Kishki
- · Replies 19 ·
Graduate Is the wavefunction/quantum_state in electron interference experiments real?
- forkosh
- · Replies 17 ·
High School Are Physical Waves Real Objects?
- Nick V
- · Replies 6 ·
Graduate Incompleteness of Bell's Theorems
- JPBenowitz
- · Replies 6 ·
Graduate Does anyone know what Pilot wave theory is?
- CosmicCube
- · Replies 1 ·
Graduate Particles that are traveling towards the past
- Xargoth
- · Replies 2 ·
Graduate What do the superscript and subscript zeros mean on the Hamiltonian?
- rwooduk
- · Replies 2 ·
Graduate What does Weinberg–Witten theorem want to express?
- Ganesh Ujwal
- · Replies 1 ·
Graduate Is Kaluza-Klein Theory Relevant to Quantum Mechanics and Non-Locality?
- Marceli
- · Replies 6 ·
Graduate How do we know uncertainty principal isnt ignorance?
- acesuv
- · Replies 4 ·
Graduate Quantum Mechanics documentaries
- MMS
- · Replies 2 ·
Graduate What Inspired Planck's Quantum Breakthrough in Black-Body Radiation?
- Mikeal
- · Replies 3 ·
Undergrad How does magnetic interactions happen in proximity?
- 1832vin
- · Replies 1 ·
Graduate Is the gauge potential in this action from the particle or external?
- "pi"mp
- · Replies 6 ·
Graduate What is trivial and non-trivial gate in computing?
- Callaghan
- · Replies 5 ·
Undergrad Linear operator and linear vector space?
- wasi-uz-zaman
- · Replies 3 ·
Graduate Continuous set of eigenvalues in matrix representation?
- nomadreid
- · Replies 2 ·
Graduate The Path Inetgral and Classical Lagrange
- Quarlep
- · Replies 3 ·
Graduate Quantum Mechanics Just Got Less Complicated - Really?
- bhobba
- · Replies 20 ·
Graduate Nuclear Spin and Selection Rules
- Tainty
- · Replies 15 ·
Graduate Computation of propagation amplitudes for KG field
- Theage
- · Replies 3 ·
Graduate Understanding Stable Particles: Neutrons, Electrons, Photons, and Neutrinos
- Garrulo
- · Replies 5 ·
Graduate How can a wave have a continuously changing trajectory?
- JonathanCollins
- · Replies 13 ·
Graduate 50th anniversary of Bell's theorem
- bohm2
- · Replies 125 ·
Graduate Dual Nature of Photon (and such particles) - WHY?
- Abishek
- · Replies 10 ·
Graduate Can a single quantum experiment have multiple valid mathematical descriptions?
- bahamagreen
- · Replies 4 ·
Graduate What conditions create and restore wave function behavior?
- jimmylegss
- · Replies 3 ·
Graduate Qubit Math: Partitioning Phi into BetaA and BetaB
- Elroy
- · Replies 3 ·
Graduate Why is Energy Conservation Not Guaranteed?
- Ahmad Kishki
- · Replies 1 ·
Undergrad How does Alain Aspect's experiment show polarisation is decided at measurement?
- tim1608
- · Replies 2 ·
Undergrad Planck's law (wavelength, frequency, angle?)
- Lamdbaenergy
- · Replies 1 ·
Graduate Where does the 'i' come from in QFT path integral?
- nuclearhead
- · Replies 36 ·
Graduate Are Uncertainty Principles Found in Classical Mechanics?
- Johan0001
- · Replies 22 ·
Graduate Can we have upper bounds on outcome probabilities in frequentism?
- jk22
- · Replies 5 ·
Graduate How can I sort photons by spin?
- jartsa
- · Replies 1 ·
Graduate What is the dimension of the state vector?
- Xiaomin Chu
- · Replies 11 ·
Graduate Is it possible that Higgs is a force carrier?
- Bruce Wallman
- · Replies 9 ·
Graduate Gauge invariance/Lorentz invariance of regulator in QED
- WannabeNewton
- · Replies 7 ·
Graduate Can a Quantum Field Be Defined by a Finite or Infinite Set of Points in 3D?
- Duhoc
- · Replies 13 ·
Graduate Magnetic moment from neutral particles in QFT
- TrickyDicky
- · Replies 4 ·
Graduate Deriving Wien's displacement and distribution laws from thermodynamics
- koustav
- · Replies 8 ·
Graduate Learning quantum mechanics from photoelectric effect to wave-particle duality
- Chemer
- · Replies 7 ·
Graduate Can we observe a photon in flight or only when it's absorbed?
- Johan0001
- · Replies 10 ·