Justin C. Feng

justin.feng at tecnico.ulisboa.pt

Mailing Address:
Instituto Superior Técnico
Departamento de Física / CENTRA
Gabinete 4-8.12
Av. Rovisco Pais 1
1049-001 Lisboa, PORTUGAL

Welcome to my academic webpage. I'm currently working as a postdoc in the GRIT group of the CENTRA research unit at Instituto Superior Técnico. I work on a variety of topics related to general relativity. Here's my cv.


Duarte, M., Gasperín, Feng, J. C., E., Hilditch, D., Regularizing Dual-Frame Generalized Harmonic Gauge at Null Infinity, (2022) (arXiv:2206.13661)

Duarte, M., Feng, J. C., Gasperín, E., Hilditch, D., Peeling in Generalized Harmonic Gauge, To appear in Class. Quant. Grav., (2022) (arXiv:2205.09405)

Feng, J. C., Hejda, F., Carloni, S., Relativistic location algorithm in curved spacetime, Phys. Rev. D 106, 044034, (2022) (arXiv:2201.01774)

Feng, J. C., Mukohyama, S., Carloni, S., Junction conditions and sharp gradients in generalized coupling theories, Phys. Rev. D 105, 104036 (2022) (arXiv:2203.00011)

Feng, J. C., Chakraborty, S., Weiss variation for general boundaries, Gen Relativ Gravit 54, 67 (2022) (arXiv:2111.06897)

Feng, J. C., Lémos, J. P. S., Matzner, R. A., Self collision of a portal wormhole, Phys. Rev. D 103, 124037 (2021) (arxiv:2105.03433)

Duarte, M., Feng, J., Gasperín, E., Hilditch, D., High Order Asymptotic Expansions of a Good-Bad-Ugly Wave Equation, Class. Quant. Grav. 38 145015 (2021) (arxiv:2101.07068)

Feng, J. C., Mukohyama, S., Carloni, S., Minimal exponential measure model in the post-Newtonian limit, Phys. Rev. D 103, 084055 (2021) (arxiv:2011.12305)

Chakraborty, S., Feng, J. C., Perturbations of the Almost Killing Equation and their implications, Phys. Rev. D 103, 084020 (2021) (arxiv:2011.13955)

Bhattacharjee, C., Feng, J. C., On Beltrami states near black hole event horizon, Phys. Plasmas 27, 072901 (2020) (arxiv:2007.00687)

Feng, J. C., Carloni, S., New class of generalized coupling theories, Phys. Rev. D 101, 064002 (2020) (arxiv:1910.06978).

Feng, J. C., Note on gravity at the boundary of an AdS vacuum, (2020) (arxiv:2002.08342)

Feng, J. C., Gasperín, E., Williams, J. L., Almost-Killing equation: Stability, hyperbolicity, and black hole Gauss law, Phys. Rev. D 100, 124034 (2019) (arxiv:1911.04354)

Bhattacharjee, C., Feng, J. C., Mahajan, S. M., Black hole in a superconducting plasma, Phys. Rev. D 99, 024027 (2019) (arxiv:1903.08117)

Feng, J. C., Some globally conserved currents from generalized Killing vectors and scalar test fields, Phys. Rev. D 98, 104035 (2018) (arxiv:1811.05312)

Bhattacharjee, C., Feng, J. C., Stark, D. J., Surveying the implications of generalized vortical dynamics in curved space-time, MNRAS, 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 (1911.05016)

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)


The Poor Man's Introduction to Tensors - These are my notes on the tensor formalism for multivariable calculus. The notes serve as an introduction accessible to those with a basic knowledge of linear algebra and vector calculus. For those who wish to read these notes on a mobile device, here is the two column version.
Last major update: December 31st 2017
(Most recent typo fixes added 11-22-2018)

Codes and Mathematica files

squirrel.jl - This is a Curved Spacetime Relativistic Location tool for use in relativistic positioning systems.

cereal.jl - This is a Special Relativistic Location tool for use in relativistic positioning systems.

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.

mathematica-files - This repository contains mathematica files for my research articles.

Last modified 2022-08-17