

Hi there! I'm a theoretical physicistI work on topics related to general relativity. I am currently a postdoc working in the GRIT group of the CENTRA research unit at Instituto Superior Técnico. Here's my cv. NotesThe Poor Man's Introduction to
Tensors  These are my notes on tensorsthey serve as an introduction to tensor calculus (in Euclidean space) 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. ArticlesFeng, J. C., Carloni, S. A new class of generalized coupling theories, (2019) (arxiv:1910.06978) Feng, J. C., GasperÃn, 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, 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 laserranged 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 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) CodesPoMiN  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. Last modified 12132019 