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On the Emergence of Time in Quantum Gravity
quantum gravity emergence quantum geometrodynamics
2008/4/22
We discuss from a philosophical perspective the way in
which the normal concept of time might be said to `emerge'
in a quantum theory of gravity. After an introduction, we
briefly discuss the notio...
On the problem of emergence of classical space-time: The quantum-mechanical approach
Emergence generalized functions Hilbert space
2008/4/22
The classical space-time structure is derived from the structure of an abstract infinite dimensional separable Hilbert space S. For this S is first realized as a Hilbert space H* of functions of abstr...
Passage of Time in a Planck Scale Rooted Local Inertial Structure
Flow of time Temporal Transience
2008/4/22
It is argued that the `problem of time' in quantum gravity necessitates a refinement of thelocal inertial structure of the world, demanding a replacement of the usual Minkowski lineelement by a 4+2n d...
Probability, Arrow of Time and Decoherence
time asymmetry of probabilities decoherent histories
2008/4/22
This paper relates both to the metaphysics of probability and to the physics of time asymmetry. Using the formalism of decoherent histories, it investigates whether intuitions about intrinsic time dir...
Quantum Time Arrows, Semigroups and Time-Reversal in Scattering
Irreversibility time arrows rigged Hilbert space
2008/4/22
Two approaches toward the arrow of time for scattering processes have been proposed in rigged Hilbert space quantum mechanics. One, due to Arno Bohm, involves preparations and registrations in laborat...
Recent Conceptual Consequences of Loop Quantum Gravity. Part III: A Postscript On Time.
Natural Philosophy Philosophy of Science Quantum Gravity
2008/4/22
With a view to the results discussed in the first two parts of this paper, the concept of time is revisited oncemore and chosen as an example in order to demonstrate the meaning of fundamental in both...
Remarks on Space-time and Locality in Everett's Interpretation
quantum mechanics Everett many-minds many-worlds
2008/4/22
Interpretations that follow Everett's idea that (at some level of description) the universal wave function contains a multiplicity of coexisting realities, usually claim to give a completely local acc...
Review of Palle Yourgrau's "Gödel Meets Einstein: Time Travel in the Gödel Universe."
Gö del Universe Time Travel
2008/4/22
This is a review of Yourgrau's book, the second edition of his "The Disappearance of Time."
Review of Time and the Metaphysics of Relativity
the Metaphysics of Relativity Review of Time
2008/4/22
In his recent book Time and the Metaphysics of Relativity, William Lane Craig uses the concept of time to try to reconstruct strong conceptual links between theology, metaphysics and physics, three ve...
Some Thoughts on Relativity and the Flow of Time: Einstein's Equations given Absolute Simultaneity
Einstein Relativity
2008/4/21
The A-theory of time has intuitive and metaphysical appeal, but suffers from tension, if not inconsistency, with the special and general theories of relativity (STR and GTR). The A-theory requires a n...
Special relativity is most naturally formulated as a theory of spacetime geometry, but within the spacetime framework probability appears to be a purely epistemic notion. It is possible that progress ...
Space-time relationism in Newtonian and relativistic physics
space time relativity relationism
2008/4/21
I argue that there is a natural relationist interpretation of Newtonian and relativistic non-quantum physics. Although relationist, this interpretation does not fall prey to the traditional objections...
Special Relativity, Time, Probabilism, and Ultimate Reality
Special relativity time spacetime quantum theory
2008/4/21
McTaggart distinguished two conceptions of time: the A-series, according to which events are either past, present or future; and the B-series, according to which events are merely earlier or later tha...
General relativity is commonly thought to imply the existence of a unique metric structure for space-time. A simple example is presented of a general relativistic theory with ambiguous metric structur...
We discuss the possibility to build and operate a time machine, a device that produces closed timelike curves (CTCs). We specify the spacetime structure needed to implement a time machine and assess a...