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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
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
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
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
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
28_Klein-Gordon Field and Lagrangians duration 1 hour 19 minutes 28_Klein-Gordon Field and Lagrangians 28_Klein-Gordon Field and Lagrangians	28_Klein-Gordon Field and Lagrangians Physics 4Q03 Lecture 28: This lecture applies the framework of relativistic quantum fields to the simplest case of a spinless particle and constructs the Klein Gordon hamiltonian and some of its… phi star particle hamiltonian thing particles energy momentum things field times bar factor function equation term space commutator schrodinger interaction From Clifford Burgess 89 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
27-Microcausality duration 1 hour 22 minutes 27-Microcausality 27-Microcausality	27-Microcausality Physics 4Q03 Lecture 27: This lecture describes the logic that determines which fields can be used to represent particles of different spins, and describes the requirement of microcausality and why… lambda transformations particle lorentz field transformation phi matrix thing inverse spin particles star times space representations fields invariant momentum function From Clifford Burgess 84 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
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
Final Tutorial duration 1 hour 18 minutes Final Tutorial Final Tutorial	Final Tutorial Physics 4Q03 Tutorial Weds April 14: This is the final tutorial spent taking up part of the midterm and answering questions. Good luck with your exams! times star thing sum delta alpha root vectors matrix direction pi vector question dimensions lambda basis things components function energy From Clifford Burgess 76 plays 0
26-Poincare Generators duration 1 hour 15 minutes 26-Poincare Generators 26-Poincare Generators	26-Poincare Generators Physics 4Q03 Lecture 26: This lecture works through how Poincare generators (4-momentum and the angular momentum tensor) transform in quantum relativity. A sketch is given of the argument for the… transformations lambda transformation thing omega alpha times matrix things lorentz inverse beta mu space hamiltonian theta epsilon multiplication bar momentum From Clifford Burgess 71 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
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
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
QFT-Tut-210111 duration 54 minutes 1 second QFT-Tut-210111 QFT-Tut-210111	QFT-Tut-210111 This is the QFT tutorial for Jan 11, 2021 things notes lecture theory field thing material questions assignments lectures level end week bit topics kind class yada mechanics physics From Clifford Burgess 61 plays 0
25 Symmetries in QM duration 1 hour 14 minutes 25 Symmetries in QM 25 Symmetries in QM	25 Symmetries in QM Physics 4Q03 Lecture 25: This lecture finishes the general review of special relativity in terms of 4-vectors and reviews the treatment of symmetry in quantum mechanics. thing things psi transformations transformation vector components vectors matrix space times theta star operator direction rotations relativity minus operators rotation From Clifford Burgess 59 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
2104-UVClues-Imperial-Burgess duration 1 hour 11 minutes 2104-UVClues-Imperial-Burgess 2104-UVClues-Imperial-Burgess	2104-UVClues-Imperial-Burgess EFTS, Gravity and Clues from the UV: Theory Group Seminar for Imperial College April 2021 theory things scale field energy thing physics energies theories gravity models space fields string symmetry expansion point problem sense fact From Clifford Burgess 55 plays 0
24-Relativity duration 1 hour 20 minutes 24-Relativity 24-Relativity	24-Relativity Physics 4Q03 Lecture 24: This lecture summarizes some aspects of special relativity, including its formulation in terms of the Lorentz group. transformations things thing matrix beta lambda components speed parameters vector tau relativity light rotations energy frame reference minus space observer From Clifford Burgess 56 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