

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. ArticlesDuarte, M., Gasperín, Feng, J. C., E., Hilditch, D., Regularizing DualFrame 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., 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., Hejda, F., Carloni, S., Relativistic location algorithm in curved spacetime, To appear in Phys. Rev. D, (2022) (arXiv:2201.01774) 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 GoodBadUgly Wave Equation, Class. Quant. Grav. 38 145015 (2021) (arxiv:2101.07068) Feng, J. C., Mukohyama, S., Carloni, S., Minimal exponential measure model in the postNewtonian 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., AlmostKilling 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 spacetime, 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 laserranged 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 WheelerDeWitt Equation, Phys. Rev. D 98, 026024 (2018) ( arXiv:1802.08576) Feng, J., Baumann, M., Hall, B., Doss, J., Spencer, L., Matzner, R., PoMiN: A PostMinkowskian NBody Solver, ApJ 859 130 (2018) (arXiv:1805.00813) Feng, J. C., Matzner, R. A., From Path Integrals to the WheelerDeWitt Equation: On Time Evolution in Spacetimes With Spatial Boundary, Phys. Rev. D, 96:106005, Nov 2017 (arXiv:1708.07001) NotesThe 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. Codes and Mathematica filessquirrel.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 PostMinkowskian NBody 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. mathematicafiles  This repository contains mathematica files for my research articles. Last modified 20220805 