Advancing Towards a Theoretical Physics Career: What's Next?

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For someone pursuing a career in theoretical physics and considering further studies, the discussion highlights the importance of advancing knowledge in quantum mechanics (QM) and general relativity (GR). Recommended resources include Bransden & Joachain for QM and Hartle for GR. In mathematics, studying calculus on manifolds and differential geometry is suggested to support GR, while functional analysis is beneficial for QM. Additionally, exploring statistical mechanics, thermodynamics, and optics is advised if there is interest in diversifying topics. For deeper engagement with previously studied subjects, texts like Marion's Mechanics, Jackson's Electrodynamics, and Sakurai's Quantum Mechanics are recommended. The conversation also notes the varied difficulty of the material learned, suggesting a mix of undergraduate coursework and self-study.
shines57
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Question: What's next for me? What should I learn next in physics and math?

(I want a career in theoretical physics - phd route).

I've learned:

Physics: Newtonian Mech w/ calc, Griffith's Intro to Electrodynamics, Goldstein's classical mechanics, griffith's intro to quantum mechanics, and Faber's Fluid Dynamics for Physicists.

Math: multivariable calc, diff equations, partial diff equations, lie algebra, and linear algebra.

Thanks for the advise and help in advance! :)


shines57
 
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Physics: Sounds like you are ready for more advanced QM and GR. Try reading Bransden & Joachain, fo example. For GR, maybe Hartle?

Math: Calculus on manifolds? Differential geomtry would help with GR. Some formal education on functional analysis (Hilbert spaces etc) would probably not hurt for QM either.
 
If you want to change topics in Physics then go to Statistical Mechanics/Thermodynamics and Oscillation-Waves-Optics. but if you want to do more on your studied topics [which is from Elementry level books] then go to Marion's Mechanics, Jackson's Electrodynamics and Sakurai's Quantum Mechanics.
In Mathematics remaining field Analytical Geometry.
 
In what context have you learned these? Undergraduate? Self study? Its an odd range of difficulty of material.
 
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Yesterday, 9/5/2025, when I was surfing, I found an article The Schwarzschild solution contains three problems, which can be easily solved - Journal of King Saud University - Science ABUNDANCE ESTIMATION IN AN ARID ENVIRONMENT https://jksus.org/the-schwarzschild-solution-contains-three-problems-which-can-be-easily-solved/ that has the derivation of a line element as a corrected version of the Schwarzschild solution to Einstein’s field equation. This article's date received is 2022-11-15...
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