Results 31 to 40 of about 146 (61)

A gravitational theory of quantum mechanics [PDF]

open access: yes
An explanation for quantum mechanics is given in terms of a classical theory (general relativity) for the first time. Specifically, it is shown that certain structures in classical general relativity can give rise to the non-classical logic normally ...
Hadley, Mark J.
core  

Einstein, the reality of space, and the action-reaction principle [PDF]

open access: yes, 2013
Einstein regarded as one of the triumphs of his 1915 theory of gravity - the general theory of relativity - that it vindicated the action-reaction principle, while Newtonian mechanics as well as his 1905 special theory of relativity supposedly violated ...
Brown, Harvey   +4 more
core  

Evolution of second-order cosmological perturbations. [PDF]

open access: yes, 1984
We present a method for constructing gauge-invariant cosmological perturbations which are gauge-invariant up to second order. As an example, we give the gauge-invariant definition of the second-order curvature perturbation on uniform density ...
Blair, D   +999 more
core   +8 more sources

EFT beyond the horizon:stochastic inflation and how primordial quantum fluctuations go classical [PDF]

open access: yes, 2014
We identify the effective theory describing inflationary super-Hubble scales and show it to be a special case of effective field theories appropriate to open systems.
Burgess, C. P.   +10 more
core   +1 more source

Gauge-Invariant Localization of Infinitely Many Gravitational Energies from All Possible Auxiliary Structures [PDF]

open access: yes, 2009
The problem of finding a covariant expression for the distribution and conservation of gravitational energy-momentum dates to the 1910s. A suitably covariant infinite-component localization is displayed, reflecting Bergmann's realization that there are ...
Pitts, J. Brian, J. Brian Pitts
core   +1 more source

Background-Independence [PDF]

open access: yes, 2011
Intuitively speaking, a classical field theory is back-ground-independent if the structure required to make sense of its equations is itself subject to dynamical evolution, rather than being imposed ab initio.
Belot, Gordon, Gordon Belot
core   +1 more source

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 [PDF]

open access: yes, 2011
It is a commonplace in the philosophy of physics that any local physical theory can be represented using arbitrary coordinates, simply by using tensor calculus. On the other hand, the physics literature often claims that spinors \emph{as such} cannot be
Pitts, J. Brian, J. Brian Pitts
core  

'No Success like Failure ...': Einstein's Quest for General Relativity, 1907-1920 [PDF]

open access: yes, 2008
This is the chapter on general relativity for the Cambridge Companion to Einstein which I am co-editing with Christoph ...
Janssen, Michel
core  

The Relevance of Irrelevance: Absolute Objects and the Jones-Geroch Dust Velocity Counterexample, with a Note on Spinors [PDF]

open access: yes, 2005
James L. Anderson analyzed the conceptual novelty of Einstein's theory of gravity as its lack of ``absolute objects.'' Michael Friedman's related concept of absolute objects has been criticized by Roger Jones and Robert Geroch for implausibly admitting ...
Pitts, J. Brian, J. Brian Pitts
core  

The viability of modified gravity theories [PDF]

open access: yes, 2009
PhDThis thesis studies the viability of classes of modified gravity (MG) theories based on generalisations of the Einstein-Hilbert action. Particular emphasis is given to f(R) theories in both the metric and Palatini formalisms, scalar-tensor theories ...
Uddin, Kotub
core   +2 more sources

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