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hep-th2009★ 9 cited
Cauchy Problem on Non-globally Hyperbolic Spacetimes
I. Ya. Arefeva, T. Ishiwatari, I. V. Volovich
Solutions of the Cauchy problem for the wave equation on a non-globally hyperbolic spacetime, which contains closed timelike curves (time machines) are considered. It is proved, th…
hep-th2006★ 57 cited
On the Null Energy Condition and Cosmology
I. Ya. Aref'eva, I. V. Volovich
Field theories which violate the null energy condition (NEC) are of interest for the solution of the cosmological singularity problem and for models of cosmological dark energy wit…