NIST is developing a new measurement standard known as the NIS thermometer, which provides highly accurate data for the extreme cold temperatures needed to run quantum computers. This small sensor relies on a specific three-layer design of metal, insulator, and superconductor to measure temperature through a quantum property called electron tunneling. By tracing measurements directly to fundamental physical constants, the device eliminates the need for regular calibration and ensures consistent results across different facilities.
Currently in the development phase, the system is projected to be much more affordable than traditional thermometers while eventually covering a wider range of temperatures. Although the initial version handles temperatures around 0.01 to 1 kelvin, future research aims to extend its capabilities to even colder levels. This advancement is vital for quantum technology, as maintaining stable, ultra-low temperatures is required to keep qubits functional and prevent errors during computation.
Source: https://www.nist.gov/noac/technology/thermodynamics/nis-thermometer
Keywords: NIS thermometer, electron tunneling, low-temperature metrology
