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00_What_is_QFT duration 18 minutes 14 seconds 00_What_is_QFT 00_What_is_QFT	00_What_is_QFT This is lecture 0: what is QFT and how will this course be taught? This provides a short 18 minute description of what the quantum field theory is about, together with a short summary of topics. The… particles particle field things theory mechanics electromagnetism physics force fermions bosons quantum forces systems function processes wave distinction higgs electron From Clifford Burgess 499 plays 0
01_Units_BraKet duration 1 hour 8 minutes 01_Units_BraKet 01_Units_BraKet	01_Units_BraKet Physics 4Q03 Lecture 01. This lecture reviews several topics usually already encountered in earlier courses such as fundamental units, Dirac's bra and ket notation for quantum mechanics, the… From Clifford Burgess 266 plays 0
02_IdentPtcl_SHO duration 1 hour 0 minutes 02_IdentPtcl_SHO 02_IdentPtcl_SHO	02_IdentPtcl_SHO Physics 4Q03 Lecture 02. This lecture describes several issues associated with multiple-particle states in quantum mechanics, including the classification of all particles as bosons or fermions and… particles particle momentum energy position operators star things operator omega hamiltonian space thing mechanics psi basis function quantum momenta eigenstates From Clifford Burgess 156 plays 0
03_Creation_Annihilation duration 55 minutes 23 seconds 03_Creation_Annihilation 03_Creation_Annihilation	03_Creation_Annihilation Physics 4Q03 Lecture 03: This lecture provides the foundation of much of what follows: the definition and properties of creation and annihilation operators. These operators provide a basis in terms… star particle particles energy momentum thing root matrix times things ground labels operator label oscillator operators n. element stars hamiltonian From Clifford Burgess 134 plays 0
04_Fermions_Completeness duration 46 minutes 50 seconds 04_Fermions_Completeness 04_Fermions_Completeness	04_Fermions_Completeness Physics 4Q03 Lecture 04: This lecture extends the notions of creation and annihilation operators to fermions, and derives the anticommutation algebra that these satisfy. The lecture also sketches out… particle star particles operator operators matrix thing fermions lambda labels creation bosons hamiltonian photons momentum destruction things space energy zeta From Clifford Burgess 84 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
06_Scattering duration 52 minutes 23 seconds 06_Scattering 06_Scattering	06_Scattering Physics 4Q03 Lecture 06: This lecture uses the results for time-dependent perturbation theory to calculate transition rates in terms of the matrix elements of the interaction Hamiltonian, culminating… energy function interaction delta alpha beta hamiltonian times momentum thing problem naught infinity matrix rate eigenstates limit wave element packet From Clifford Burgess 118 plays 0
07_Emission duration 1 hour 18 minutes 07_Emission 07_Emission	07_Emission Physics 4Q03 Lecture 07: This lecture applies Fermi's Golden Rule to evaluate the rate for photon emission by an excited atom. This example is also used to illustrate the phenomenon of… delta momentum energy function particle thing times factor decay things rate cubed hamiltonian continuum volume element particles star k. matrix From Clifford Burgess 134 plays 0
08-AbsrbGenNThermalDist duration 1 hour 27 minutes 08-AbsrbGenNThermalDist 08-AbsrbGenNThermalDist	08-AbsrbGenNThermalDist 4Q03 Lecture 08: This lecture continues to convert Fermi's Golden Rule to continuum normalization, doing so for a simple absorption process and then for a general scattering process, defining… particles momentum thing volume particle rate factor times function cubed continuum beta delta alpha energy probability reaction density factors matrix From Clifford Burgess 105 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
10-FieldEnergyRenorm duration 1 hour 4 minutes 10-FieldEnergyRenorm 10-FieldEnergyRenorm	10-FieldEnergyRenorm 4Q03 Lecture 10: This lecture computes the energy shift of a particle due to its interaction with another, introducing ultraviolet divergences and the concept of renormalization along the way. The… energy particle thing particles delta things interaction field epsilon sum function momentum hat times cubed p. answer mass naught k. From Clifford Burgess 77 plays 0
11-Locality2ndQuantization duration 54 minutes 50 seconds 11-Locality2ndQuantization 11-Locality2ndQuantization	11-Locality2ndQuantization 4Q03 Lecture 11; This lecture argues why the Hamiltonian should arise as a local function in space, and this is used to motivate the definition of position-space fields. The local form for the… star hamiltonian things times operators operator particle function x. particles space functions equation delta position psi energy potential creation schrodinger From Clifford Burgess 64 plays 0
12-PositionSpace Interactions duration 1 hour 31 minutes 12-PositionSpace Interactions 12-PositionSpace Interactions	12-PositionSpace Interactions Physics 4Q03 Lecture 12: This lecture summarizes the position space formalism of the previous lecture and introduces simple self-interactions. particles energy particle thing things hamiltonian star function momentum sum interaction times probability prime problem volume delta n. operator space From Clifford Burgess 66 plays 0
13-BE Condensation duration 56 minutes 44 seconds 13-BE Condensation 13-BE Condensation	13-BE Condensation Physics 4Q03 Lecture 13: This lecture reviews how to set up averages with statistical mechanics, translating the grand canonical ensemble into the language of occupation number. This is used to… particles thing mu energy sum beta minus epsilon density volume probability function alpha particle naught infinity ground bar things story From Clifford Burgess 45 plays 0
14-Semiclassical BEC duration 1 hour 3 minutes 14-Semiclassical BEC 14-Semiclassical BEC	14-Semiclassical BEC Physics 4Q03 Lecture 14: This lecture continues the discussion of Bose Einstein condensation and shows how a semiclassical analysis can allow a calculation of the optimal density of condensed… psi naught particles energy thing hat ground star density volume epsilon mu things expectation times momentum interaction term infinity particle From Clifford Burgess 45 plays 0
15-Bogliubov duration 1 hour 7 minutes 15-Bogliubov 15-Bogliubov	15-Bogliubov Physics 4Q03 Lecture 15: This lecture describes the leading corrections to the classical BEC, using a Bogoliubov transformation to identify the spectrum of quasiparticle fluctuations about the… psi naught star energy hat thing ground particles times things epsilon momentum phase p. minus cosh chi function operator root From Clifford Burgess 58 plays 0
16-MaxwellsEqs duration 1 hour 2 minutes 16-MaxwellsEqs 16-MaxwellsEqs	16-MaxwellsEqs Physics 4Q03 Lecture 16: This lecture provides a whirlwind review of Maxwell's equations and their solutions in terms of electromagnetic waves. This allows an introduction to gauge invariance… equation field equations wave solution phi things fields divergence thing solutions vector curl freedom hand omega gauge side electromagnetism region From Clifford Burgess 67 plays 0
17-PhotonsInQED duration 1 hour 7 minutes 17-PhotonsInQED 17-PhotonsInQED	17-PhotonsInQED Physics 4Q03 Lecture 17: This lecture continues the discussion of quantizing the electromagnetic fields and shows how field energy and momentum can be written in terms of photon creation and… field energy thing equation things omega epsilon operator lambda solution function equations star operators momentum freedom vector density delta k. From Clifford Burgess 48 plays 0
18-MorePhotonsEM duration 1 hour 0 minutes 18-MorePhotonsEM 18-MorePhotonsEM	18-MorePhotonsEM Physics 4Q03 Lecture 18: This lecture continues the previous one on photons in electromagnetism, and provides a sermon about UV and IR divergences and why you can use any regularization you like to… energy ground thing things lambda particles theory answer distances field naught story momentum omega plates divergences problem electromagnetism particle function From Clifford Burgess 39 plays 0
19-Casimir Energy duration 1 hour 6 minutes 19-Casimir Energy 19-Casimir Energy	19-Casimir Energy Physics 4Q03 Lecture 19: This lecture evaluates the Casimir energy for the vacuum fluctuations of a field between two plates on which the field vanishes, showing that it is UV finite. Along the way… omega thing things lambda sum function field energy infinity pi minus times direction answer factor volume root 12th equation solution From Clifford Burgess 50 plays 0
20-EM Interactions w Polarizable Atoms duration 55 minutes 27 seconds 20-EM Interactions w Polarizable Atoms 20-EM Interactions w Polarizable Atoms	20-EM Interactions w Polarizable Atoms Physics 4Q03 Lecture 20: This lecture describes how to construct interactions between electromagnetic fields and the Schrodinger fields that describe slowly moving particles. The interactions… things particles energy field psi dimensions thing fields interaction hamiltonian length size side equation atom star scattering sigma moment function From Clifford Burgess 32 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
21-EM couplings to charged particles duration 1 hour 2 minutes 21-EM couplings to charged particles 21-EM couplings to charged particles	21-EM couplings to charged particles Physics 4Q03 Lecture 21: This lecture describes how the electromagnetic vector potential (ie photons) couple to nonrelativistic charged particles, constructing the interactions by `gauging' the… things psi thing omega times term fields interaction energy length phi field particles kind transformation derivatives minus star hamiltonian gradient From Clifford Burgess 40 plays 0
2102-EFTsInflation-ChungAngU-Burgess duration 47 minutes 9 seconds 2102-EFTsInflation-ChungAngU-Burgess 2102-EFTsInflation-ChungAngU-Burgess	2102-EFTsInflation-ChungAngU-Burgess Talk on EFTs and Inflation given to the Chung Ang University conference Beyond the Standard Model, Feb 3 2021. theory things field energy thing inflation models theories gravity scale expansion times story cosmology string energies problem derivatives physics symmetries From Clifford Burgess 43 plays 0