• Offered by Research School of Physics
• ANU College ANU Joint Colleges of Science
• Course subject Physics
• Areas of interest Physics, Science, Theoretical Physics, Nuclear Physics
• Course convener
• Prof Cedric Simenel
• Mode of delivery In Person
• Co-taught Course
• Offered in Second Semester 2023
Quantum Field Theory (PHYS3201)

This advanced third year physics course provides an introduction to the concepts and tools of quantum field theory (QFT) and to its applications in various fields, such as particle physics and condensed matter. QFT is arguably the most far-reaching attempt to combine special relativity and quantum physics in a unique framework. This course builds on the content of previous courses on Classical and Quantum Mechanics, Electromagnetism, and Statistical Physics, providing an elegant synthesis of these key areas of modern Physics. We explain in this course the origin of particles (why are all electrons identical?), forces (why same charge repel while gravitation is attractive?) and antiparticles. The Feynman path integral formalism is used, leading to Klein-Gordon, Maxwell and Dirac equations. Feynman diagrams to describe interacting fields are also introduced. The concepts of Gauge Invariance, spontaneous symmetry breaking, as well as the Goldstone and Higgs mechanisms are introduced in a general context, and applied, e.g., to describe superfluidity, superconductivity and ferromagnetism.

## Learning Outcomes

Upon successful completion, students will have the knowledge and skills to:

1. Describe the reasons for the failure of relativistic quantum mechanics, such as the causality problem, and the need for quantum field theory
2. Describe the origin of particles and forces
3. Analyse the statistical distributions of identical particles and the repulsive/attractive nature of the forces as a function of spins
4. Apply Feynman rules to calculate probabilities for basic processes with particles (decay and scattering)
5. Obtain classical and/or non-relativistic limits of fully quantum and relativistic models, and identify the relativistic origin of effects such as the spin-orbit interaction
6. Use effective field theory techniques to develop models at large scales
7. Describe qualitatively effects such as superconductivity, superfluidity, and ferromagnetism using the concepts of gauge invariance, Goldstone and Higgs mechanism, and spontaneous symmetry breaking.
8. Apply mathematical tools such as complex analysis, Gaussian path integration, and Fourier analysis in the context of physical systems
9. Develop computational skills by solving numerically simple problems such as pionless effective field theory and the Ising model.
10. Develop oral and written communication skills

## Indicative Assessment

1. Assignments and online questions (50) [LO 1,2,3,4,5,6,7,8,9,10]
2. Final written exam (50) [LO 1,2,3,4,5,6,7,8]

The ANU uses Turnitin to enhance student citation and referencing techniques, and to assess assignment submissions as a component of the University's approach to managing Academic Integrity. While the use of Turnitin is not mandatory, the ANU highly recommends Turnitin is used by both teaching staff and students. For additional information regarding Turnitin please visit the ANU Online website.

The expected workload will consist of approximately 130 hours throughout the semester including:

• Face-to face component which will consist of 1 x 3 hour workshop per week.
• Approximately 94 hours of self-study which will include listening/viewing the online lectures, preparation for the weekly online lectures, workshops/labs and other assessment tasks.

This is a flipped class.

Not applicable

## Requisite and Incompatibility

To enrol in this course you must have completed PHYS3101 and PHYS3102. Incompatible with PHYS3002 and PHYS6201.

## Prescribed Texts

N/A

"Quantum Field Theory in a Nutshell" by A. Zee (2nd ed., 2010)
"Quantum Field Theory for the Gifted Amateur", by T. Lancaster and S. Blundell (2015)

## Assumed Knowledge

It is recommended that students have also completed PHYS3105.

## Fees

Tuition fees are for the academic year indicated at the top of the page.

Commonwealth Support (CSP) Students
If you have been offered a Commonwealth supported place, your fees are set by the Australian Government for each course. At ANU 1 EFTSL is 48 units (normally 8 x 6-unit courses). More information about your student contribution amount for each course at Fees

Student Contribution Band:
2
Unit value:
6 units

If you are a domestic graduate coursework student with a Domestic Tuition Fee (DTF) place or international student you will be required to pay course tuition fees (see below). Course tuition fees are indexed annually. Further information for domestic and international students about tuition and other fees can be found at Fees.

Where there is a unit range displayed for this course, not all unit options below may be available.

Units EFTSL
6.00 0.12500

## Course fees

Domestic fee paying students
Year Fee
2023 \$4320
International fee paying students
Year Fee
2023 \$6180
Note: Please note that fee information is for current year only.

## Offerings, Dates and Class Summary Links

ANU utilises MyTimetable to enable students to view the timetable for their enrolled courses, browse, then self-allocate to small teaching activities / tutorials so they can better plan their time. Find out more on the Timetable webpage.

The list of offerings for future years is indicative only.
Class summaries, if available, can be accessed by clicking on the View link for the relevant class number.

### Second Semester

Class number Class start date Last day to enrol Census date Class end date Mode Of Delivery Class Summary
6682 24 Jul 2023 31 Jul 2023 31 Aug 2023 27 Oct 2023 In Person View