Must time-machine construction violate the weak energy condition\?

Details Must time-machine construction violate the weak energy condition\? Must time-machine construction violate the weak energy condition\?

Oct 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993phrvl..71.2517o&link_type=abstract

Physical Review Letters, Volume 71, Issue 16, October 18, 1993, pp.2517-2520

Mathematics

Logic

19

Fundamental Problems And General Formalism, Exact Solutions

Scientific paper

We present a time-machine model in which closed timelike curves evolve, within a bounded region of space, from a well-behaved spacelike initial slice S; this slice (and the entire spacetime) is asymptotically flat and topologically trivial. In addition, this model satisfies the weak energy condition everywhere on S and up until and beyond the time slice (an achronal hypersurface) which displays the causality violation. We discuss the relation of this model to theorems by Tipler and Hawking which place constraints on time-machine solutions.

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