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International Journal of Theoretical Physics

Schrödinger’s Cat Meets Einstein’s Twins: A Superposition of Different Clock Times

Vlatko Vedral, Fumiaki Morikoshi

Published Oct 1, 2007• 7 citations
Publisher
DOI
10.1007/s10773-007-9568-y

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Abstract The universality of time dilation is sometimes misunderstood, with claims that it applies exclusively to light clocks and not to mechanical clocks or other material objects, including biological entities. This leads to incorrect interpretations of experiments like the Hafele–Keating experiment, which actually confirm relativistic effects through the use of atomic clocks. To address this issue, we propose a thought experiment, inspired by Schrödinger’s cat, involving a ‘Sync-or-Die clock’, a device that combines a light clock and a mechanical stopwatch, with the life of Einstein’s cat, Tiger, depending on their synchronization. A straightforward analysis shows that both clocks experience time dilation equally, reinforcing the fact that time dilation is not limited to clocks based on light propagation but is a universal feature of Special Relativity.