Philosopher of Science
J. (James) Brian Pitts, Ph.D., Ph.D.
"Einstein's Physical Strategy, Energy Conservation, Symmetries, and Stability: 'but Grossmann & I believed that the conservation laws were not satisfied,'" forthcoming in Studies in History and Philosophy of Modern Physics. PhilSci; arxiv.org/1604.03038 [physics.hist-ph]. Explores how Einstein sought conservation laws during 1913-15, using the wrong symmetry (linear coordinate transformations instead of translations).
"Space-time Philosophy Reconstructed via Massive Nordström Scalar Gravities? Laws vs. Geometry, Conventionality, and Underdetermination," Studies in History and Philosophy of Modern Physics 53 (2016) 73–92. PhilSci; arXiv:1509.03303 [physics.hist-ph]. Shows how most issues in space-time philosophy are affected by a graviton mass term, using the easy scalar case. The realistic tensor case is current in the physics literature.
"Universally Coupled Massive Gravity, III: dRGT-Maheshwari Pure Spin-2, Ogievetsky-Polubarinov and Arbitrary Mass Terms,” Annals of Physics 365 (2016) 73-90; arXiv:1505.03492 [gr-qc]. Shows that all mass terms are universally coupled and that the 2010 dRGT breakthrough was anticipated in 1971.
"Change in Hamiltonian General Relativity from the Lack of a Time-like Killing Vector Field," Studies in History and Philosophy of Modern Physics 47 (2014) pp. 68–89; http://philsci-archive.pitt.edu/; http://arxiv.org/abs/1406.2665. Shows that change exists in Hamiltonian GR with the proper criteria in place, including equivalence to the Lagrangian and 4-dimensional geometry.
"A First Class Constraint Generates Not a Gauge Transformation, But a Bad Physical Change: The Case of Electromagnetism," Annals of Physics 351 (2014) pp. 382–406; Philsci; arxiv:1310.2756. Uncovers the source of much of the mystery about observables and gauge freedom in Hamiltonian theory formulations.
"Irrelevant Conjunction and the Ratio Measure or Historical Skepticism," Synthese 190 (2013) 2117-2139; Philsci-archive.pitt.edu.
"Time and Fermions: General Covariance vs. Ockham's Razor for Spinors," Proceedings of the 4th International Conference on Time and Matter, 4-8 March 2013, Venice, Italy, edited by Martin O’Loughlin, Samo Stanič, and Darko Veberič, University of Nova Gorica Press, Nova Gorica, Slovenia (2013), pp. 185-198; Philsci; arXiv:1509.02710.
"The Nontriviality of Trivial General Covariance: How Electrons Restrict 'Time' Coordinates, Spinors (Almost) Fit into Tensor Calculus, and 7/16 of a Tetrad Is Surplus Structure," Studies in History and Philosophy of Modern Physics 43 (2012) 1-24; Philsci-archive.pitt.edu; arXiv:1111.4586. Shows that Ockham's razor and general covariance conflict for spinors.
G. J. Mathews, T. Kajino, W. Aoki, W. Fujiya, and J. B. P., "Exploring the Neutrino Mass Hierarchy Probability with Meteoritic Supernova Material, ν-process Nucleosynthesis, and θ13 Mixing," Physical Review D 85 (2012) 105023 (8 pages); arXiv:1108.0725v2 [astro-ph.HE]. Supplied Bayesian logical backbone of the paper.
"Universally Coupled Massive Gravity, II: Densitized Tetrad and Cotetrad Theories," General Relativity and Gravitation 44 (2012) 401-426; arXiv:1110.2077.
"Permanent Underdetermination from Approximate Empirical Equivalence in Field Theory: Massless and Massive Scalar Gravity, Neutrino, Electromagnetic, Yang-Mills and Gravitational Theories," The British Journal for the Philosophy of Science 62 (2011) 259-299. Shows that underdetermination has a generic heuristic in quantitative theories.
"Massive Nordström Scalar (Density) Gravities from Universal Coupling," General Relativity and Gravitation 43 (2011) 871-895; arXiv:1010.0227.
"Gauge-Invariant Localization of Infinitely Many Gravitational Energies from All Possible Auxiliary Structures," General Relativity and Gravitation 42 (2010) 601-622; arXiv:0902.1288, Philsci-archive.pitt.edu. Provides a non-paradoxical systematic interpretation of symmetries and conservation laws in General Relativity, by recognizing many distinct energies related by Noether's theorem to the many distinct Lagrangian symmetries.
“Why the Big Bang Singularity Does Not Help the Kalām Cosmological Argument for Theism,” The British Journal for the Philosophy of Science 59 (2008) 675-708.
“Universally Coupled Massive Gravity,” with W. C. Schieve, Theoretical and Mathematical Physics 151 (2007) 700-717, gr-qc/0503051v3; also in Russian.
“Absolute Objects and Counterexamples: Jones-Geroch Dust, Torretti Constant Curvature, Tetrad-Spinor, and Scalar Density,” Studies in History and Philosophy of Modern Physics 37 (2006) 347-371; Philsci-archive.pitt.edu, gr-qc/0506102v4. Aimed to rehabilitate the Anderson-Friedman analysis of general covariance until the Geroch-Giulini scalar density scalar example appeared, showing that GR itself has an absolute object.
“Constrained Dynamics of Universally Coupled Massive Spin 2-spin 0 Gravities,” Journal of Physics: Conference Series 33 (2006) 279-284. Talk at Fourth Meeting on Constrained Dynamics and Quantum Gravity “QG05,” Cala Gonone, Sardinia, Italy, September 2005; hep-th/0601185.
Review of George Kean Sweetnam’s The Command of Light: Rowland’s School of Physics and the Spectrum (American Philosophical Society, Philadelphia, 2000), in Aestimatio 2 (2005) 33-8.
“Null Cones and Einstein’s Equations in Minkowski Spacetime,” with W. C. Schieve, Foundations of Physics 34 (2004) 211-238; gr-qc/0406102.
“Slightly Bimetric Gravitation,” with W. C. Schieve, General Relativity and Gravitation 33 (2001) 1319-1350; gr-qc/0101058.