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pro vyhledávání: '"Pitts, J."'
Autor:
Pitts, J. Brian
Recently two pairs of authors have aimed to vindicate the longstanding conventional claim that a first-class constraint generates a gauge transformation in typical gauge theories such as electromagnetism, Yang-Mills and General Relativity, in respons
Externí odkaz:
http://arxiv.org/abs/2212.02944
Peter Bergmann on Observables in Hamiltonian General Relativity: A Historical-Critical Investigation
Autor:
Pitts, J. Brian
Publikováno v:
Studies in History and Philosophy of Science 95 (2022) pp. 1-27
The problem of observables and their supposed lack of change has been significant in Hamiltonian quantum gravity since the 1950s. This paper considers the unrecognized variety of ideas about observables in the thought of Peter Bergmann, who invented
Externí odkaz:
http://arxiv.org/abs/2208.06043
Autor:
Pitts, J. Brian
Publikováno v:
Forthcoming in Antonio Vassallo (Ed.), "The Foundations of Spacetime Physics: Philosophical Perspectives", Routledge (2022) pp. 79-107
The questions of what represents space-time in GR, the status of gravitational energy, the substantivalist-relationalist issue, and the (non)exceptional status of gravity are interrelated. If space-time has energy-momentum, then space-time is substan
Externí odkaz:
http://arxiv.org/abs/2208.05946
Autor:
Pitts, J. Brian
In Hamiltonian GR, change has seemed to be missing, defined only asymptotically, or otherwise obscured at best. By construing change as essential time dependence, can one find change locally in Hamiltonian GR with spinors? This paper is motivated by
Externí odkaz:
http://arxiv.org/abs/2110.15266