Written by Muhammad Rohail T.
A temperature-sensing performance that decays as the fourth power of temperature, T⁻⁴, distinguishes finite-spectrum quantum probes from those with unbounded spectra, which fall more slowly as T⁻². This work establishes a direct link between a quantum system’s energy levels and its ability to measure temperature, moving beyond simply acknowledging spectral influence. Identifying these distinct high-temperature behaviours offers a valuable design principle for optimising temperature sensors fo...