Possible research directions for a beginner in TQFT

In summary, possible research directions for a beginner in Topological Quantum Field Theory (TQFT) include exploring the connections between TQFT and low-dimensional topology, investigating specific models such as 2D TQFTs, studying the role of categories in TQFT, examining the implications of TQFT in quantum computing, and analyzing the relationship between TQFT and mathematical physics. Beginners can also focus on understanding the foundational concepts and applications in various fields, while considering collaborations with experienced researchers to enhance their learning experience.
  • #1
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I am highly interested in Topological Quantum Field Theory (TQFT) and am currently planning on doing a project on this topic this year. Some of my relevant background: Algebra (Groups, Rings, Fields, basics of Categories and Modules), Topology (Munkres), Smooth Manifolds (John Lee's book, first 17 chapters - up to integration on manifolds and basics of deRham Cohomology), 2 semesters of undergrad Analysis and finally some introductory algebraic topology (though I'll be studying this more completely this coming Fall). For physics, I'm currently starting to learn QFT from Peskin-Schroeder's popular book.

Now, TQFT recently has been developing rapidly and turned into a vast subject for a newcomer like me to find a specific topic to work on. I'm interested in aspects of TQFT concerning Category theory, knot theory, quantum groups and the likes. I'm also interested in existence of smooth structures. My understanding is that each one of these are themselves vast enough.

So, my question is:
  • What are some TQFT research topics a beginning grad student can pursue that relates to higher categories and/or knot theory? Can someone suggest some possible sub-topics to look at? Also, what "extra" background is needed?
Feel free to suggest if there are other sub-topics that are more suited for a beginner in the field. Ultimately, I want to get a feel for actual research in TQFT through a project. TIA.
 
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You will probably get more useful answers if you clarify your situation. Your profile says US, and your post says that you are a beginning grad student. So are you a grad student at a university in the US? If so, are you in a Master's or PhD program? If you are in a PhD program, have you passed the qual exam?

You say that you are interested in a topic for a project, not for a thesis. What is the nature of this project? Will you have an advisor or supervisor? If yes, have you discussed topics with them?
 
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  • #3
In addition to CrysPhys' questions, are you on the math or physics side? I don't know much about this area, but I recall having the impression that there were a lot of mathematicians working on TQFT. The only thing even remotely sounding like physics in your post is the invocation of P&S's book.
 
  • #4
CrysPhys said:
You will probably get more useful answers if you clarify your situation. Your profile says US, and your post says that you are a beginning grad student. So are you a grad student at a university in the US? If so, are you in a Master's or PhD program? If you are in a PhD program, have you passed the qual exam?

You say that you are interested in a topic for a project, not for a thesis. What is the nature of this project? Will you have an advisor or supervisor? If yes, have you discussed topics with them?
For the moment I'm just an independent research. I said beginning grad just to give an idea of my academic preparation so far. So to answer your question, no, I won't have an advisor. That's one of the big reasons of posting here to see if someone could suggest looking into something.
 
  • #5
Haborix said:
In addition to CrysPhys' questions, are you on the math or physics side? I don't know much about this area, but I recall having the impression that there were a lot of mathematicians working on TQFT. The only thing even remotely sounding like physics in your post is the invocation of P&S's book.
My current academic training has been more focused on the theoretical math side of things. This is mainly because my undergrad institution didn't have a strong theoretical physics program and I wasn't really into the experimental side of things. However, I had taken all the "theory" based classes offered, like, classical mechanics (Goldstein), e&m(Griffiths), stat mech (blundell) and of course QM 1&2. I only mentioned P&S's QFT to mean that I've done almost everything that's assumed as a prereq for that QFT text.
One other book I've recently finished reading is Baez's Gauge Fields, Knots & Gravity, which was a wonderful read.
 

FAQ: Possible research directions for a beginner in TQFT

What is Topological Quantum Field Theory (TQFT)?

Topological Quantum Field Theory (TQFT) is a branch of mathematical physics that studies quantum field theories which are invariant under continuous deformations of space-time. TQFTs focus on topological properties rather than geometric ones, meaning they are concerned with the properties of spaces that remain unchanged under continuous transformations. This area of study has applications in both physics and mathematics, particularly in the understanding of topological invariants and quantum computing.

What are some beginner-friendly topics in TQFT?

Some beginner-friendly topics in TQFT include the study of simple models like the 2D TQFTs, such as the Witten-Reshetikhin-Turaev invariants, and their connections to knot theory. Additionally, exploring the relationship between TQFT and category theory can provide foundational insights. Another approachable topic is the exploration of the role of TQFT in topological phases of matter, which is increasingly relevant in condensed matter physics.

What mathematical background is needed to start researching TQFT?

To start researching TQFT, a solid understanding of basic concepts in topology, particularly algebraic topology, is essential. Familiarity with homology, cohomology, and fundamental groups will be beneficial. Additionally, a grasp of category theory and some aspects of quantum mechanics are important, as TQFTs bridge these disciplines. Basic knowledge of differential geometry may also be helpful, especially in higher-dimensional contexts.

Are there any recommended resources or textbooks for beginners in TQFT?

Yes, there are several excellent resources for beginners in TQFT. "Topological Quantum Field Theory" by Jacob Lurie provides a modern approach, while "Quantum Field Theory and Statistical Mechanics: A Mathematical Introduction" by Alain Connes and Claude Rovelli offers a more accessible entry point. Online lecture notes and courses from universities can also be valuable, as well as introductory texts on algebraic topology and category theory to build the necessary mathematical foundations.

What are some potential research questions or projects in TQFT for beginners?

Potential research questions for beginners in TQFT could include exploring the relationship between TQFT and knot invariants, investigating the role of TQFT in quantum computing, or studying specific examples of 2D TQFTs and their applications in physics. Another interesting project could involve examining how TQFTs can be used to classify topological phases of matter or developing new invariants from existing TQFT frameworks.

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