Emerging from imaginary time

Synthese 108 (2):185 - 203 (1996)

Recent models in quantum cosmology make use of the concept of imaginary time. These models all conjecture a join between regions of imaginary time and regions of real time. We examine the model of James Hartle and Stephen Hawking to argue that the various no-boundary attempts to interpret the transition from imaginary to real time in a logically consistent and physically significant way all fail. We believe this conclusion also applies to quantum tunneling models, such as that proposed by Alexander Vilenkin. We conclude, therefore, that the notion of emerging from imaginary time is incoherent. A consequence of this conclusion seems to be that the whole class of cosmological models appealing to imaginary time is thereby refuted.
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DOI 10.1007/BF00413497
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References found in this work BETA

QED: The Strange Theory of Light and Matter.Richard P. Feynman - 1987 - Science and Society 51 (2):211-214.
The Mind of God.Paul Davies - 1994 - Science and Society 58 (2):233-237.

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Citations of this work BETA

On the Emergence of Time in Quantum Gravity.Jeremy Butterfield & Chris Isham - 1999 - In The Arguments of Time. Published for the British Academy by Oxford University Press. pp. 111--168.
Two Purposes of Black Hole Production.Clément Vidal - 2012 - Foundations of Science 17 (1):13-15.

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