Related papers: Measuring time with stationary quantum clocks

Measuring time with stationary quantum clocks

URL: http://arxiv.org/abs/2106.07684v2
Date: Wed, 22 Sep 2021 10:08:25 GMT
Title: Measuring time with stationary quantum clocks
Authors: Sergii Strelchuk and Mischa P. Woods
Abstract summary: We show that a quantum clock can measure the passage of time even while being switched off. This supports the so-called substantival theory of time.
Score: 0.0
License: http://creativecommons.org/licenses/by/4.0/
Abstract: Time plays a fundamental role in our ability to make sense of the physical laws in the world around us. The nature of time has puzzled people -- from the ancient Greeks to the present day -- resulting in a long running debate between philosophers and physicists alike to whether time needs change to exist (the so-called relatival theory), or whether time flows regardless of change (the so-called substantival theory). One way to decide between the two is to attempt to measure the flow of time with a stationary clock, since if time were substantival, the flow of time would manifest itself in the experiment. Alas, conventional wisdom suggests that in order for a clock to function, it cannot be a static object, thus rendering this experiment seemingly impossible. Here we show, with the aid of counterfactual measurements, the surprising result that a quantum clock can measure the passage of time even while being switched off, thus lending constructive support for the substantival theory of time.

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