BRENT: Researchers at the Universitat Autònoma de Barcelona (UAB) in Spain and the University of Nottingham in the United Kingdom have developed a quantum thermometer so accurate that it can detect even the smallest changes in temperatures inside a cell.
Mathematicians from both universities present how they were able to formulate the smallest possible temperature fluctuation that can be measured. They analyzed the sensitivity of existing thermometers using a handful of atoms small enough to be able to show typical quantum-style behaviors.
The quantum thermometers the team produced are capable of reading variations of millikelvin temperature across nanoscale regions. They were built using single quantum dots, which are minute pieces of semiconductor contained within a larger solid object.
The thermometers have been used to measure the temperatures of semiconductor electrons and the variations of heat within a living cell.
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