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.
Sub-forums
Threads
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 Is the Dirac equation a field equation or a wave function 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 How can light be both a wave and discrete packets of energy?
- 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 ·
Graduate Why Does the Kraus Map Need to be Completely Positive?
- Henriamaa
- · Replies 1 ·
Graduate Why is probability of transition between states found with squared overlap?
- rida
- · Replies 2 ·
Graduate Why don't we perceive systems during decoherence?
- StarsRuler
- · Replies 1 ·
Graduate The Time Symmetry Debate in Quantum Theory
- TrickyDicky
- · Replies 165 ·
Graduate What is the QED LSZ-reduction formula?
- center o bass
- · Replies 1 ·
Graduate Where can I find resources to learn the math behind quantum mechanics?
- PhysicsDad
- · Replies 12 ·
Graduate Are quantum mechanical effects faster than speed of light?
- kannan_k
- · Replies 26 ·
Graduate QED running coupling definition.
- center o bass
- · Replies 2 ·
Graduate Artificial magnetic monopoles and Maxwell's equations
- Charles Wilson
- · Replies 1 ·
Graduate Does mass depend on energy scale?
- geoduck
- · Replies 1 ·
Graduate What are some recommended free Quantum Optics PDFs for learning and reference?
- Spinnor
- · Replies 3 ·
Graduate Ward identity from Ward-Takahashi identity?
- center o bass
- · Replies 2 ·
Graduate Quantum eraser and the experimenter's retina?
- garyrob
- · Replies 2 ·
Graduate What are the properties and applications of ferromagnetic thin films?
- vinzie
- · Replies 6 ·
Graduate Why Lagrangian is Used in Quantum Field Theory
- lonewolf219
- · Replies 5 ·
Graduate Entanglement Hypothesis by de Broglie in 1935
- genefalk
- · Replies 5 ·
Graduate General Gauge Invariance Problem
- llorgos
- · Replies 2 ·
Graduate Wave Function Collapse and Entropy
- stevendaryl
- · Replies 49 ·
Graduate Time Evolution of Measurables(Hamiltonian)
- aim1732
- · Replies 2 ·
Graduate Looking for mentor to answer QFT questions during 8-week REU
- lonewolf219
- · Replies 2 ·
Graduate Hamiltonian of linear harmonic oscilator
- LagrangeEuler
- · Replies 12 ·
Graduate Do you have any interest in Quaternionic Quantum Mechanics?
- lee.spi
- · Replies 15 ·
Graduate Orthonormality of cosine eigenfunctions in the infinite square well
- Cogswell
- · Replies 2 ·
Graduate Is it possible to create a higher energy photon from two lower ones?
- zrek
- · Replies 11 ·
Graduate Bell Proof Against Hidden Variables in EPR
- msumm21
- · Replies 1 ·
Graduate Real Time Entanglement from the Zeilinger Group
- Charles Wilson
- · Replies 12 ·
Graduate Definition of a wavefunction as a function of position.
- 71GA
- · Replies 23 ·
Graduate Is coherence a single photon phenomenon?
- Einstein Mcfly
- · Replies 4 ·
Graduate Probability Greater than 1 in λφ^4 Theory
- geoduck
- · Replies 1 ·
Graduate Could packet round-trip times be an analog to qubits?
- MerryMoose
- · Replies 2 ·
Graduate I need all the information about theHeisenberg's uncertainty principle
- lee.spi
- · Replies 13 ·
Graduate Can Individual Gluons Be Extracted from a Nucleus?
- Physicist50
- · Replies 3 ·
Graduate What is the difference between quantum mechanics and QFT?
- lonewolf219
- · Replies 6 ·
Graduate Photon emission by an excited hydrogen atom
- Ruslan_Sharipov
- · Replies 4 ·
Graduate Classical Limit formula for differential cross section for Hard Sphere
- aim1732
- · Replies 7 ·
Graduate Common eigenvalues for two states or two bases of same state?
- nomadreid
- · Replies 4 ·
Undergrad Why does vacuum have properties?
- jijopaul
- · Replies 3 ·
Graduate Is E Always Greater Than V(x) in the Time-Independent Schrodinger Equation?
- robotopia
- · Replies 1 ·
Graduate (Peskin and Schroeder) Numerator of vertex correction
- ndcat10
- · Replies 1 ·
Graduate Why does the density matrix contain temperature in one form but not the other?
- LagrangeEuler
- · Replies 1 ·
Graduate How did 19th century physicists approach the ultraviolet catastrophe?
- Physics Monkey
- · Replies 6 ·
Graduate Shouldn't the mass of an electron be uncertain?
- gamow99
- · Replies 1 ·
Graduate Unitarity angular momentum operators
- Yoran91
- · Replies 5 ·
Graduate Basic question on quantum mechanics and choice
- entropy15
- · Replies 10 ·
Graduate Cassimir's Dark Energy Plate Experiment
- JasonSouthworh
- · Replies 3 ·
Graduate Can UV photons spontaneously convert into IR photons, and vice versa?
- edevere
- · Replies 11 ·
Graduate How meaurements increase entropy?
- StarsRuler
- · Replies 9 ·
Graduate Degenerate perturbation theory degeneracy not lifted by perturbation
- tamaghna
- · Replies 8 ·
Graduate Http:www.univie.ac.at/qfp/publications3/pdffiles/1999-10.pdf real?
- StarsRuler
- · Replies 7 ·
Graduate So what exactly is entanglement?
- daveyrocket
- · Replies 7 ·
Graduate Non-locality and the Bekenstein bound?
- nomadreid
- · Replies 3 ·
Graduate Neutron Spin Time Evolution in Interferometer
- hpar
- · Replies 3 ·
Graduate Can Entropy Decrease After a Projective Measurement?
- StarsRuler
- · Replies 3 ·
Graduate Quantum Behavior As Extreme Classical Behavior
- sanman
- · Replies 30 ·
Graduate If decoherence matters in 2 different observables
- StarsRuler
- · Replies 3 ·
Graduate Field transformations in Weinberg's QToF
- brodekind
- · Replies 3 ·
Graduate Spectrum of the Hamiltonian in QFT
- unchained1978
- · Replies 5 ·
Graduate Vacuum expectation values of combinations of ##a^\dagger## and ##a##
- LayMuon
- · Replies 2 ·
Graduate Wick theorem for particle-antiparticle annihilation
- LayMuon
- · Replies 6 ·
Graduate Four Handed Entanglement - With a Catch
- Charles Wilson
- · Replies 3 ·
Graduate Why express fields as annihilation and creation operators
- Ray
- · Replies 17 ·
Undergrad Is it possible to slow down/stop the light?
- Requadin
- · Replies 5 ·
Graduate How Does Quantum Entanglement Affect Electron Spin Measurements?
- bardeen
- · Replies 2 ·
Graduate Field Theory Partition Function
- unchained1978
- · Replies 2 ·
Graduate How does the Klein-Gordon Lagrangian relate to the equations of motion?
- nylonsmile
- · Replies 11 ·
Graduate How to solve for allowed energies with the WKB approximation?
- Hypercubes
- · Replies 2 ·
Graduate Optical theorem with infinite scattering potential
- ndung200790
- · Replies 6 ·
Graduate A modified double slit screen scenario- what would happen?
- bcrelling
- · Replies 4 ·
Graduate The Quasi Classical Approximation(Landau Lifshitz)
- aim1732
- · Replies 1 ·
Graduate Hankel Functions: Solutions to Cylindrical Wave Equation
- aim1732
- · Replies 7 ·
Graduate Relation between mass and wave function
- nil1996
- · Replies 5 ·
Graduate A single atom in a cold, closed, vacuum system.
- nukapprentice
- · Replies 11 ·
Graduate How Do We Correctly Calculate the Distribution of Bosons Among Energy Levels?
- ShayanJ
- · Replies 1 ·
Graduate Double Harmonic Approximation IR intensties
- DinosaurChemi
- · Replies 1 ·
Graduate Trying to wrap my brain around entanglement-superposition
- drschools
- · Replies 3 ·
Graduate Why does the phase-space contour integral equal action?
- Glidos
- · Replies 2 ·
Graduate Field and conjugate independent?
- geoduck
- · Replies 4 ·
Graduate Does gravity break down in the big bang?
- daanaerts
- · Replies 6 ·
Graduate Acceleration operator and the electron in a hydrogen atom
- QuasiParticle
- · Replies 4 ·
Graduate Wavepacket incident on a potential step
- id00022
- · Replies 7 ·
Graduate Existence of Pure Quantum States
- msumm21
- · Replies 13 ·
Graduate Representation of linear operator using series ?
- V0ODO0CH1LD
- · Replies 2 ·
Graduate Number of possible wavefunctions only countably infinite?
- nomadreid
- · Replies 32 ·
Graduate Is dBB reproducing quantum results ?
- jk22
- · Replies 17 ·
Graduate Pulling out partial derivatives?
- Cogswell
- · Replies 3 ·
Graduate Uncertainty Relation between Lx and Ly
- *FaerieLight*
- · Replies 14 ·
Graduate Can Singlets be Prepared with a Preferred Direction?
- anorlunda
- · Replies 2 ·
Graduate Quantum teleportation and the density matrix
- VantagePoint72
- · Replies 1 ·