The metaphysics of D-CTCs: On the underlying assumptions of Deutsch׳s quantum solution to the paradoxes of time travel

Lucas Dunlap
University of Cincinnati
I argue that Deutsch’s model for the behavior of systems traveling around closed timelike curves relies implicitly on a substantive metaphysical assumption. Deutsch is employing a version of quantum theory with a significantly supplemented ontology of parallel existent worlds, which differ in kind from the many worlds of the Everett interpretation. Standard Everett does not support the existence of multiple identical copies of the world, which the D-CTC model requires. This has been obscured because he often refers to the branching structure of Everett as a “multiverse”, and describes quantum interference by reference to parallel interacting definite worlds. But he admits that this is only an approximation to Everett. The D-CTC model, however, relies crucially on the existence of a multiverse of parallel interacting worlds. Since his model is supplemented by structures that go significantly beyond quantum theory, and play an ineliminable role in its predictions and explanations, it does not represent a quantum solution to the paradoxes of time travel.
Keywords closed timelike curves  D-CTC model  quantum information  Everett interpretation of quantum mechanics
Categories (categorize this paper)
Reprint years 2015, 2016
DOI 10.1016/j.shpsb.2016.09.001
Edit this record
Mark as duplicate
Export citation
Find it on Scholar
Request removal from index
Revision history

Download options

Our Archive

Upload a copy of this paper     Check publisher's policy     Papers currently archived: 48,902
Through your library

References found in this work BETA

The Paradoxes of Time Travel.David K. Lewis - 1976 - American Philosophical Quarterly 13 (2):145-152.
The Paradoxes of Time Travel.David Lewis - 2004 - In Tim Crane & Katalin Farkas (eds.), Metaphysics: A Guide and Anthology. Oxford University Press.
Apart From Universes.David Deutsch - 2010 - In Simon Saunders, Jonathan Barrett, Adrian Kent & David Wallace (eds.), Many Worlds?: Everett, Quantum Theory & Reality. Oxford University Press. pp. 542--552.

Add more references

Citations of this work BETA

Add more citations

Similar books and articles

Time Symmetry and the Many-Worlds Interpretation.Lev Vaidman - 2009 - In Simon Saunders, Jonathan Barrett, Adrian Kent & David Wallace (eds.), Many Worlds?: Everett, Quantum Theory & Reality. Oxford University Press.
On Time Asymmetry and History in an Everett Quantum World.Federico Laudisa - 2000 - Foundations of Physics 30 (9):1525-1538.
Can the Past Be Changed?Peter G. Grove - 2002 - Foundations of Physics 32 (4):567-587.
Everett’s Pure Wave Mechanics and the Notion of Worlds.Jeffrey A. Barrett - 2011 - European Journal for Philosophy of Science 1 (2):277-302.
Time Travel and Time Machines.Chris Smeenk & Christian Wuthrich - 2009 - In Craig Callender (ed.), The Oxford Handbook of Philosophy of Time. Oxford: Oxford University Press. pp. 577-630.
Many-Worlds Interpretation of Quantum Mechanics.Lev Vaidman - 2008 - Stanford Encyclopedia of Philosophy.
Observers and Locality in Everett Quantum Field Theory.Mark A. Rubin - 2011 - Foundations of Physics 41 (7):1236-1262.


Added to PP index

Total views
85 ( #106,143 of 2,310,062 )

Recent downloads (6 months)
16 ( #44,661 of 2,310,062 )

How can I increase my downloads?


My notes

Sign in to use this feature