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Closed timelike curves in superfluid $^{3}$He

Pedro F. Gonzalez-Diaz·Carmen L. Siguenza
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Abstract

It is shown that the curved spacetime induced in a thin film of superfluid $^{3}$He-A by the presence of symmetric vortices with the unbroken symmetry phase, admits the existence of closed timelike curves through which only superfluid clusters formed by anti-$^{3}$He atoms can travel and violate causality.

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Pedro F. Gonzalez-Diaz, Carmen L. Siguenza. 1998-09-09. Closed timelike curves in superfluid $^{3}$He. https://doi.org/10.1016/s0375-9601(98)00709-9

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