Quantum Blackbody Thermometry

Abstract

Blackbody radiation (BBR) sources are calculable radiation sources that are frequently used in radiometry, temperature dissemination, and remote sensing. Despite their ubiquity, blackbody sources and radiometers have a plethora of systematics. We envision a new, primary route to measuring blackbody radiation using ensembles of polarizable quantum systems, such as Rydberg atoms and diatomic molecules. Quantum measurements with these exquisite electric field sensors could enable active feedback, improved design, and, ultimately, lower radiometric and thermal uncertainties of blackbody standards. A portable, calibration-free Rydberg-atom physics package could also complement a variety of classical radiation detector and thermometers. The successful merger of quantum and blackbody-based measurements provides a new, fundamental paradigm for blackbody physics.

Blackbody-radiation-noise broadening of quantum systems

“…Precision spectroscopy of atomic and molecular systems is the basis of numerous metrological applications [1,2] and tests of fundamental physics [3,4] and symmetries [5,6]. A correct determination of transition energies requires careful accounting of Stark shifts due to ambient blackbody radiation (BBR).…”

“…BBR-stimulated decay is prominent in Rydberg atomic systems (typically Γ BBR 10 4 s −1 at room temperature), and has also been observed in trapped molecules [11,12], and molecular ions [13]. Recently, we surveyed the BBR-induced state transfer and levels shifts in molecular and atomic Rydberg systems, showing these are highly promising platforms for blackbody thermometry applications [2].…”