Search for tag: "perturbation"

18 Media

PHYSICS739_approximation_Methods3 duration 1 hour 9 minutes PHYSICS739_approximation_Methods3 PHYSICS739_approximation_Methods3	PHYSICS739_approximation_Methods3 Showed how to find transition amplitudes from the Dyson series. Began analyzing 1st order perturbations constant in time except for being switched on at t=t0. picture interaction schrodinger function delta perturbation energy operator probability times evolution continuum frequency omega equation transition series thing hamiltonian matrix From DUNCAN O'DELL 2 plays 0
PHYSICS739_approximation_Methods2 duration 1 hour 27 minutes PHYSICS739_approximation_Methods2 PHYSICS739_approximation_Methods2	PHYSICS739_approximation_Methods2 Introduced the interaction picture picture perturbation schrodinger equation interaction evolution energy matrix symmetry operator momentum hamiltonian thing minus hydrogen ground operators things theory problem From DUNCAN O'DELL 0 plays 0 Usage Rights None (All Rights Reserved)
PHYS739_Approximation_Methods1 duration 1 hour 20 minutes PHYS739_Approximation_Methods1 PHYS739_Approximation_Methods1	PHYS739_Approximation_Methods1 Started perturbation theory. Gave example of quadratic Stark shift of ground state. levels perturbation energy ground degenerate matrix theory subspace problem correction things eigenvectors field contribution momentum idea thing bunch term polarizability From DUNCAN O'DELL 1 plays 0 Usage Rights None (All Rights Reserved)
PHYS-4F03-class14 duration 40 minutes 55 seconds PHYS-4F03-class14 PHYS-4F03-class14	PHYS-4F03-class14 Hyperfine splitting. Taught by Wyatt Kirkby in 2021 perturbation bit thing theory electron spin eigenstates choice lambda field proton hamiltonian momentum values problem things structure hydrogen idea basis From DUNCAN O'DELL 3 plays 0
PHYS-4F03-class13 duration 36 minutes 26 seconds PHYS-4F03-class13 PHYS-4F03-class13	PHYS-4F03-class13 The Zeeman effect. Taught by Wyatt Kirkby in 2021 field perturbation energy spin thing question alpha theory bit levels hamiltonian basis kind momentum orbit electron coupling structure effect argument From DUNCAN O'DELL 14 plays 0
PHYS-4F03-class24 duration 49 minutes 31 seconds PHYS-4F03-class24 PHYS-4F03-class24	PHYS-4F03-class24 Used first order time-dependent perturbation to study the interaction between atoms and incoherent light (L17T_dep_PT_part3) energy field frequency density atom atoms rate formula light emission transition frequencies perturbation omega directions decay radiation theory sort photon From DUNCAN O'DELL 4 plays 0
PHYS-4F03-class23 duration 53 minutes 53 seconds PHYS-4F03-class23 PHYS-4F03-class23	PHYS-4F03-class23 Finished going through the slides L17T_dep_PT_part2 which included perturbations with harmonic time dependence, including the illumination of an atom by a laser. Started the next set of slides… field atom energy perturbation frequency omega light wave dipole times theory matrix direction form charge fact transition frequencies function probability From DUNCAN O'DELL 5 plays 0
PHYS-4F03-class22 duration 54 minutes 46 seconds PHYS-4F03-class22 PHYS-4F03-class22	PHYS-4F03-class22 Started the set of slides L17T_dep_PT_part2 which applies time dependent perturbation theory to various examples. omega function energy delta sort probability frequency thing perturbation expression modulus difference times fourier gaussian sine width pi term infinity From DUNCAN O'DELL 4 plays 0
PHYS-4F03-class21 duration 32 minutes 34 seconds PHYS-4F03-class21 PHYS-4F03-class21	PHYS-4F03-class21 Derived 1st order time-dependent perturbation theory (L16T_dep_PT_part1) perturbation spin coefficients side problem hand equation theory term dependence field factor piece coefficient solution lambda direction bar expression matrix From DUNCAN O'DELL 6 plays 0
PHYS-4F03-class20 duration 49 minutes 55 seconds PHYS-4F03-class20 PHYS-4F03-class20	PHYS-4F03-class20 Started time-dependent perturbation theory (L16T_dep_PT_part1) hamiltonian spin perturbation equation problem energy omega field piece dependence bar matrix operator theory term resonance pieces coefficients schrodinger minus From DUNCAN O'DELL 8 plays 0
QFT-Tut-210128 duration 42 minutes 32 seconds QFT-Tut-210128 QFT-Tut-210128	QFT-Tut-210128 Phys 4Q03 Tutorial for Jan 28, 2021. (This one mistakenly has a music track appended from a playlist that was playing when I was setting up and which I forgot to turn off because i could not hear it… particles particle thing star momentum times matrix delta factor theory root perturbation argument things side probability rule minus element operator From Clifford Burgess 34 plays 0
PHYS-4F03-class11 duration 52 minutes 5 seconds PHYS-4F03-class11 PHYS-4F03-class11	PHYS-4F03-class11 Finished slides L8DegeneratePerturbationTheory and started applications of perturbation theory in atomic physics (fine structure) perturbation field electron energy effect structure momentum quantum potential degenerate theory nucleus values hydrogen correction levels times spin factor things From DUNCAN O'DELL 12 plays 0
PHYS-4F03-class10 duration 45 minutes 56 seconds PHYS-4F03-class10 PHYS-4F03-class10	PHYS-4F03-class10 Started degenerate perturbation theory (L8DegeneratePerturbationTheory). perturbation matrix correction theory degenerate eigenvectors eigenvalues subspace things lambda sum term corrections problem basis elements element sort diagonalization equation From DUNCAN O'DELL 29 plays 0
PHYS-4F03-Class9 duration 49 minutes 35 seconds PHYS-4F03-Class9 PHYS-4F03-Class9	PHYS-4F03-Class9 Finished L7TimeIndepPerturbationTheory perturbation correction term energy lambda things theory thing corrections bit field sort side potential expression expectation equation particle levels times From DUNCAN O'DELL 5 plays 0
PHYS-4F03-Class8 duration 53 minutes 21 seconds PHYS-4F03-Class8 PHYS-4F03-Class8	PHYS-4F03-Class8 Finished identical particle and started time-independent perturbation theory. particles 0th term perturbation eigenvectors equation correction lambda eigenvalues problem wave hamiltonian sort function sum operator permutation particle theory eigenvalue From DUNCAN O'DELL 9 plays 0
09-CoherentState duration 59 minutes 32 seconds 09-CoherentState 09-CoherentState	09-CoherentState Physics 4Q03 Lecture 09: This lecture introduces coherent states, and derives them as the eigenstates to which a bosonic system is often driven in the presence of persistent stimulated emission. The… alpha star energy thing particles photons photon times ground particle theory omega momentum sum hamiltonian field perturbation bar distribution infinity From Clifford Burgess 85 plays 0
2011-OpenEFTsGravity-Yale-Burgess duration 1 hour 5 minutes 2011-OpenEFTsGravity-Yale-Burgess 2011-OpenEFTsGravity-Yale-Burgess	2011-OpenEFTsGravity-Yale-Burgess Wilson to Lindblad: Late-time Obstacles to Reliable Calculations with Horizons (and how Open EFTs can help). This talk describes how Open Effective Field Theories can be used to deal with the… times field things equation thing theory evolution scale interaction space matrix function systems argument perturbation density fluctuations term problem story From Clifford Burgess 50 plays 0
05_PtbnTheory duration 1 hour 18 minutes 05_PtbnTheory 05_PtbnTheory	05_PtbnTheory Physics 4Q03 Lecture 05: This lecture reviews the formalisms of time-independent and time-dependent Rayleigh-Schrodinger perturbation theory for quantum mechanics. picture naught energy interaction hamiltonian operators schrodinger thing things times theory perturbation evolution psi operator equation problem term vector basis From Clifford Burgess 97 plays 0