I'm a Second year math undergrad with another year left. I want to continue my academics further. Really interested in theoretical physics and Applied mathematics. Can I get into a theoretical physics Phd with math undergrad degree if I ace Physics GRE?


Yes (you might not even need the Physics GRE). Example:

The usual minimum entry requirement is a first-class honours degree, awarded after a four-year course in physics, mathematics or engineering, or a three-year degree together with a one-year postgraduate course on advanced mathematics and theoretical physics. Part III (MMath/MASt) of the Mathematical Tripos provides such a course. Note, however, that entry is competitive and a higher level of preparation may be required for research in some subject areas.

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  • "you might not even need the Physics GRE" As far as I know, GREs are only used in the US. So yes. – Anonymous Physicist Mar 24 at 9:12

Really interested in theoretical physics and Applied mathematics.

Can I get into a theoretical physics Phd

You might not even need to get into a physics phd. At least in some parts of the world mathematical physics are considered to be a mathematics subjects. From what I understand they do work on physics. Depending on what flavor of physics you are interested, you might be better suited with a math phd.

If you are sure that you want a physics phd you surely have a shot in having one. Usually graduate positions are open to people with related bachelor's but they often specify some degree of general proficency in the related area. You need to look into specifics for each position. Some phd positions have 2 years of teaching in which background material can be covered. Others start working on a thesis right away. The latter might prove more difficult to get in.

One anectode. Apperantly one of the master's students of my proffesor got into a very good physics post-doc after his phd in algebraic topology.

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  • I agree with Boaty here. You can hop around related disciplines fairly freely. I have a PhD in “pure” mathematics (functional and complex analysis), and I was able to hold positions in Mechanical Engineering and Computer science as a postdoc and research professor before ultimately coming back to math as an assistant professor. – Joel Mar 24 at 12:20
  • Also, if you are interested in the more mathematical aspects of physics, then you will want to find some one in a math department. At least in my university, most theoretical and mathematical physicists are in our mathematics department. – Joel Mar 24 at 12:22

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