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 Uncertainty Principle in Wilson Cloud Chamber Measurements
- LarryS
- · Replies 1 ·
Graduate Is There a Classical Analogue of Spin Angular Momentum in Dirac Fields?
- jostpuur
- · Replies 17 ·
Graduate References or aids in learning QM?
- physicsnoob93
- · Replies 2 ·
Graduate About mixed state and pure state
- ssampak
- · Replies 6 ·
Graduate Wavefunction collapse and measurement
- wduff
- · Replies 2 ·
Graduate Resources for information on Entropy
- LukeD
- · Replies 2 ·
Graduate What is the wavefunction of the localized particle?
- Jano L.
- · Replies 10 ·
Undergrad Anti-Bonding/Bonding Molecular Orbitals
- Tan PK
- · Replies 8 ·
Graduate Proof of trace of density matrix in pure/mixed states
- barnflakes
- · Replies 11 ·
Graduate Eigenvalues of a reduced density matrix
- barnflakes
- · Replies 3 ·
Graduate How does a single photon interfere with itself in the double slit experiment?
- cragar
- · Replies 5 ·
Graduate Bell's Inequalities and Double Dependencies on Hidden Variables
- inflector
- · Replies 8 ·
Graduate Why does distance not affect quantum entanglement?
- Fuji Katsuaki
- · Replies 4 ·
Graduate Radiation by accelerating charge
- paweld
- · Replies 11 ·
Graduate Calculating Spinning Probabilities in Richard Feynman's QCD
- zincshow
- · Replies 2 ·
Undergrad Compton Scattering: What is the Difference from Electron-Photon Absorption?
- luxiaolei
- · Replies 4 ·
Graduate Recovering lagrangian from equations of motion
- tulip
- · Replies 4 ·
Graduate Does a photon's wavefunction permeate the universe immediately?
- jnorman
- · Replies 17 ·
Graduate Squaring the delta function in QFT(Srendicki ch11)
- LAHLH
- · Replies 7 ·
Graduate Why Does Weinberg Extend Energy Integration to Negative Infinity?
- Yat-lo Lay
- · Replies 17 ·
Graduate Can two photon emerage into one?
- luxiaolei
- · Replies 1 ·
Graduate Associativity problem with observables
- zetafunction
- · Replies 1 ·
Graduate Why do electrons repel and electrons attract protons in QED?
- paweld
- · Replies 3 ·
Graduate Quantum optics, 2 qubit gates acting on 2 qubits - cannot be factorized?
- yaboidjaf
- · Replies 2 ·
Graduate Zee QFT In a Nutshell Propagator Question
- sheaf
- · Replies 7 ·
Graduate Clarifying spin, angular momentum, and triplet states
- luxiaolei
- · Replies 1 ·
Graduate How can electrons in separate atoms share the same quantum numbers?
- LostConjugate
- · Replies 2 ·
Graduate Is the uncertainty principle a fundamental limit or measurement limitation?
- lennybogzy
- · Replies 22 ·
Graduate Planck black body formula question
- telegraphic
- · Replies 3 ·
Graduate Slit diffraction: time between emission and detection of photon
- m.e.t.a.
- · Replies 1 ·
Graduate What Causes 2n^2 Vacancies in Atomic Orbitals?
- motoroller
- · Replies 1 ·
Undergrad Do photons travel in straight lines?
- johne1618
- · Replies 4 ·
Graduate Calculating Effective Mass of InGaAs Alloy
- daffoddill
- · Replies 1 ·
Graduate Is There a Smallest Time Interval in the Quantum World?
- Mr Peanut
- · Replies 6 ·
Undergrad Are atoms and the universe structurally similar?
- Ali Asadullah
- · Replies 9 ·
Graduate Von Neumann entropy in terms of the tangle
- barnflakes
- · Replies 1 ·
Graduate Interpreting the probability distribution of the potential step
- Identity
- · Replies 7 ·
Graduate Relativistic Uncertainty Principle
- LarryS
- · Replies 5 ·
Undergrad Is the Momentum of a Photon Conserved in Matter?
- tozhan
- · Replies 7 ·
Undergrad What is electron spin and what does it do?
- Char. Limit
- · Replies 96 ·
Graduate Why Do These Quantum Mechanical Selection Rules Result in Zero?
- sokrates
- · Replies 18 ·
Graduate Peskin & Schroeder questions index and resources
- Jimmy Snyder
- · Replies 1 ·
Graduate Visualizing Electrons as Probability Densities
- stevmg
- · Replies 10 ·
Graduate Quantum / gauge field -> Classical limit
- ansgar
- · Replies 1 ·
Graduate Relativistic Mechanics of Hydrogen Like S Orbials at high Z
- ChmDudeCB
- · Replies 4 ·
Graduate What causes energy levels in atoms?
- d-wat
- · Replies 39 ·
Graduate Physical meaning of higher-dimensional Dirac matrices
- eoghan
- · Replies 1 ·
Graduate Is Geometric Quantum Mechanics a Viable Alternative to Hilbert Space?
- Quadratrix
- · Replies 2 ·
Graduate Information erasure without an energy cost
- jimgraber
- · Replies 1 ·
Graduate Feynman Diagrams for Exam Prep: Position vs. Momentum Space
- madness
- · Replies 5 ·
Graduate How Does Photon Spin Relate to Frequency and Polarization?
- Prologue
- · Replies 5 ·
Graduate How does a photon carry force?
- FireBones
- · Replies 60 ·
Graduate Schrodinger Equation: Kinetic Energy Impact?
- HarryDaniels
- · Replies 2 ·
Graduate Poisson bracket of canonical momentum and spatial field derivative
- vertices
- · Replies 14 ·
Graduate Is there an energy density limit before black hole formation?
- flashprogram
- · Replies 12 ·
Graduate Fermions with no mass, and helicity coupling.
- IRobot
- · Replies 1 ·
Graduate Are quarks really in isocoles triangle positions?
- Puma
- · Replies 1 ·
Graduate Can Energy and Interactions Create Electrons?
- Moviemann345
- · Replies 2 ·
Graduate How Does the Heisenberg Uncertainty Principle Challenge Classical Physics?
- Rico L
- · Replies 26 ·
Graduate New look at Youngs experiment
- Iforgot
- · Replies 8 ·
Graduate Where Does Charge Originate in Antimatter and Elementary Particles?
- Leon_of_Vinci
- · Replies 13 ·
Graduate Is the Photon a Unique Entity or a Chain of Energy Interactions?
- madhatter106
- · Replies 3 ·
Graduate Uniqeness of elemental particles
- mark noble
- · Replies 15 ·
Graduate Concervation of Momentum and Non-Classical Paths
- JDługosz
- · Replies 20 ·
Graduate QFT - interaction between field
- paweld
- · Replies 1 ·
Graduate Why does this integral go to zero?
- vertices
- · Replies 9 ·
Graduate Visualizing 6pz orbitals with Python and Mayavi
- fk08
- · Replies 1 ·
Undergrad About the excited state of an electron
- oguz
- · Replies 2 ·
Graduate Can someone explain this quantum physics concepts to me?
- matthayzon89
- · Replies 46 ·
Graduate How to Calculate Momentum using QM Completeness Relation?
- luisgml_2000
- · Replies 6 ·
Graduate Calculating weights of Feynman Diagrams
- vertices
- · Replies 5 ·
Graduate Why can't S_z equal zero if angular momentum is along the x or y axis?
- LostConjugate
- · Replies 13 ·
Graduate Experimental test of the Uncertainty principle
- IRobot
- · Replies 15 ·
Graduate Peskin Schroeder which chapter
- Neitrino
- · Replies 3 ·
Graduate Seperation of variables, infinite cubic well
- student111
- · Replies 2 ·
Graduate Physicists capture first images of atomic spin
- Frzn
- · Replies 1 ·
Graduate How can a photon carry electromagnetic force if photons have momentum?
- scilover89
- · Replies 8 ·
Graduate LS coupling for identical electrons
- mk_gm1
- · Replies 2 ·
Graduate Laplacian of 1/r in Darwin term
- NanakiXIII
- · Replies 3 ·
Graduate Time dependence of scalar product
- Shredface
- · Replies 2 ·
Undergrad Why Does Photomultiplier Tube Emit 2 Electrons?
- SciencePF
- · Replies 2 ·
Graduate Can infinite information be stored in nested spheres if volume equals surface area?
- rrw4rusty
- · Replies 1 ·
Graduate Can a Computer Generate Precognition Through Positron Experimentation?
- rhenretta
- · Replies 4 ·
What aspects of quantum mechanics interest you most?
- Aki
- · Replies 20 ·
Undergrad Electron energy increases with N?
- diagopod
- · Replies 9 ·
Graduate Normalised wavefunction to calculate the expectation
- roshan2004
- · Replies 5 ·
Graduate The radius of an electron orbit in helium
- Kennalj
- · Replies 11 ·
Graduate Schrodinger Time Dependent equation
- HarryDaniels
- · Replies 3 ·
Graduate Why doesn't energy expectation value depend on time for a particle in an infinite well?
- Master J
- · Replies 6 ·
Graduate What does 'Nothing' mean to a quantum physicist?
- pctopgs
- · Replies 21 ·
Graduate Really basic quantum mechanics question
- barnflakes
- · Replies 1 ·
Graduate What is the physical reason for the speed of light paradox?
- Jean Paul
- · Replies 11 ·
High School Is 'The Secret Law of Attraction' considered quantum physics? Do you support it?
- matthayzon89
- · Replies 7 ·
Graduate Radial probability density / quantum numbers.
- adwodon
- · Replies 4 ·
Graduate Overlap integrals in quantum harmonic oscillator problems
- randybryan
- · Replies 1 ·
Graduate Why does Σ¹ = 2iγ²γ³ from the Levi-Civita commutator formula?
- vertices
- · Replies 2 ·
Graduate Quantum Suicide Theory = Everyone Dies Of Old Age?
- Marglar7
- · Replies 13 ·
Graduate How Can Degenerate Fermi Gases Illuminate Quantum Statistics?
- PRodQuanta
- · Replies 1 ·
Graduate Allowed energies for electrons in hydrogenic atoms
- manenbu
- · Replies 2 ·
Graduate Is this an error in Srednicki?
- LAHLH
- · Replies 1 ·