Time itself just got more precise. A quantum clock trick lets us beat the thermodynamic limits—at least exponentially. #quantumclocks #physicsnews #entropy

https://geekoo.news/quantum-clocks-can-beat-thermodynamic-limits/

Let's talk #quantum time.

What's annoyingly being glossed over?
What's time, truly?
What's time, quantumly?

One vantage point can be by thinking of what are quantum clocks.

As a conversation starter, here's a @quantumjournal paper by Mischa Woods discussing a possible axiomatic definition.
https://quantum-journal.org/papers/q-2021-01-17-381/

Would you agree that #QuantumClocks measure what clocks measure so a good definition of a clock defines well what it measures so time is that?
I'm more happy than not with that line of thinking. You? Is this any good as a definition of time if we'd be thinking about time in strongly warped areas of the cosmos or at microscales?

I'm less happy with the Wooters constructions but maybe I don't know enough? Feels a bit artificial somehow... Any interaction that is of the Feynman-Kitaev 'clock' type is hard for me to phantom. Is it expected to appear in nature on its own?

What about causal inference stuff. Can time be emergent? I don't like it because I don't see how to take the limit to Lorentz transformations where there's a limit on what rapidities can do and tachyons need to be penalized the hell out of the observable universe so as not to appear the semiclassical regime.

I claim these are the only relevant topics. It will be my pleasure to be demonstrated by you how much of an ignorant I am. Thanks 😊🤗

I got a lovely vintage souvenir in Lausanne. Here shown in Bern (where Einstein lived with Marič and worked on a) the special theory of relativity b) patent attorney stuff c) some other fuzzy stuff, yah) on the way onwards to Vienna. Watches, on trains, in Bern. Hah! 😅 Story in #altText but in short the watch made me think about time as tangible.