Revisiting thermometry at millikelvin scales: Temperature as a statistically emergent quantity
Summary
The author revisits the topic of thermometry at millikelvin scales, nearly a decade after last writing about it. They discuss how thermometers work by linking physical observables to temperature, and reflect on the nature of temperature as a statistically emergent quantity that only makes sense for ensembles of particles, not single particles in isolation. A recent arXiv preprint serves as the catalyst for this renewed discussion.
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bskyRevisiting thermometry at millikelvin scales: Temperature as a statistically emergent quantitynanoscale.blogspot.comKey quotes
· 3 pulledThermometers are devices that allow us to take some physical observable and infer temperature.
Temperature is a statistically emergent quantity (it doesn't make sense to talk about the temperature of a single particle in isolation) that tells us whether there will be a net flow
It's been almost a decade since I last wrote about this topic, and a preprint on the arXiv this week is a good jumping off point for more discussion.
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