Complex geometry, quantum tunneling, and time machines

Details Complex geometry, quantum tunneling, and time machines Complex geometry, quantum tunneling, and time machines

Nov 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993phrvd..48.4735l&link_type=abstract

Physical Review D (Particles, Fields, Gravitation, and Cosmology), Volume 48, Issue 10, 15 November 1993, pp.4735-4737

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11

Fundamental Problems And General Formalism

Scientific paper

A space with a complex metric permitted by quantum cosmology is given; two regions, one containing no closed causal curve and one containing closed timelike curves, are separated by a complex region. Through quantum tunneling one can travel from one region to the other. The vacuum polarization stress-energy tensor converges everywhere so the space is stable. This challenges Hawking's chronology protection conjecture and highlights on building a time machine.

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