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Full-Text Articles in Physical Sciences and Mathematics
Thermodynamics Of Modified Theories Of Gravity, Aric Hackebill
Thermodynamics Of Modified Theories Of Gravity, Aric Hackebill
Theses and Dissertations
Einstein’s equations are derived by following Jacobson’s thermodynamic method. It is seen that a family of possible field equations exist which satisfy the thermodynamic argument. Modified theories of gravity are addressed as possible candidates for replacing dark matter as an explanation for anomalous cosmological phenomena. Many of the proposed modified theories are not powerful enough to explain the currently observed phenomena and are rejected as viable theories of gravity. A surviving candidate, TeVeS, is further analyzed under the aforementioned thermodynamic argument to check for its consistency with thermodynamics.
Logic Is To The Quantum As Geometry Is To Gravity, Rafael D. Sorkin
Logic Is To The Quantum As Geometry Is To Gravity, Rafael D. Sorkin
Physics - All Scholarship
will propose that the reality to which the quantum formalism implicitly refers is a kind of generalized history, the word history having here the same meaning as in the phrase sum-over-histories. This proposal confers a certain independence on the concept of event, and it modifies the rules of inference concerning events in order to resolve a contradiction between the idea of reality as a single history and the principle that events of zero measure cannot happen (the Kochen-Specker paradox being a classic expression of this contradiction). The so-called measurement problem is then solved if macroscopic events satisfy classical rules of …