Justin C. Feng

Ph.D Physics, The University of Texas at Austin (2017)
B.S. Physics, University of California, Irvine (2009)

Mailing Address:
Department of Physics
The University of Texas at Austin
1 University Station C1600
Austin, TX 78712

Office: RLM 9.224
E-mail: jc[my last name]@[my department].utexas.edu


Howdy! I am a research affiliate postdoctoral fellow in the physics department working with Prof. Richard Matzner in the theory and relativity groups. Here's my cv.

Research Interests

My research is a mixture of theoretical and numerical work in General Relativity. My theoretical work concerns topics involving variational principles in classical and quantum General Relativity (with a focus on boundary terms). I am also involved in a couple of numerical projects; I'm currently involved in the development of the PoMiN code, and the development of a GR code based on the generalized harmonic gauge formulation of the Einstein Field Equations.



The Poor Man's Introduction to Tensors - These are my notes on tensors--they serve as an introduction to tensor calculus (in Euclidean space) accessible to those with a basic knowledge of linear algebra and vector calculus. (Updated December 31st 2017)


Bhattacharjee, C., Feng, J. C., Stark, D. J., Surveying the implications of generalized vortical dynamics in curved space-time, Monthly Notices of the Royal Astronomical Society, page sty2277, 2018

Ciufolini, I., Matzner, R. A., Feng, J. C., Paolozzi, A., Rubincam, D. P., Pavlis, E. C., Ries, J. C., Sindoni, G. and Paris, C., A new laser-ranged satellite for General Relativity and space geodesy: IV. Thermal drag and the LARES 2 space experiment , Eur. Phys. J. Plus (2018) 133: 333

Feng, J. C., Matzner, R. A., The Weiss Variation of the Gravitational Action, Gen Relativ Gravit (2018) 50: 99 (arXiv:1708.04489)

Feng, J. C., A Volume Average Regularization for the Wheeler-DeWitt Equation, Phys. Rev. D 98, 026024 (2018) ( arXiv:1802.08576)

Feng, J., Baumann, M., Hall, B., Doss, J., Spencer, L., Matzner, R., PoMiN: A Post-Minkowskian N-Body Solver, ApJ 859 130 (2018) (arXiv:1805.00813)

Feng, J. C., Matzner, R. A., From Path Integrals to the Wheeler-DeWitt Equation: On Time Evolution in Spacetimes With Spatial Boundary, Phys. Rev. D, 96:106005, Nov 2017 (arXiv:1708.07001)


PoMiN - This is a Post-Minkowskian N-Body code, written in C, which includes General Relativistic effects up to first order in Newton's constant G, and all orders in the speed of light c.


Last modified 09-19-2018