U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Physical Measurement Laboratory

Quantum Measurement Division

Projects/Programs

Displaying 1 - 25 of 45
thermal converter

AC-DC Difference

Ongoing
The NIST Ac-dc 2 Difference Project performs leading edge measurement services and research for ac-dc difference measurements and dc voltage metrology. We
joint quantum institute

Applications of Quantum Information

Ongoing
Theory is being developed and used to devise methods for preserving and exploiting the quantum behavior of ever-larger systems for metrology, communication, and

Atomic Spectroscopy Data Center

Ongoing
Critical compilations of atomic energy levels, transition wavelengths, and transition probabilities. Online databases.
SI Base Units chart

Calibration of Force Transducers

Ongoing
NIST provides calibration services for force-measuring instruments by applying known forces, compression, tension or both, to the elastic transducer and
traceability chain illustration

Calibration of Mass Standards

Ongoing
The NIST Mass and Force Group disseminates the unit of mass, the kilogram, to the US measurement system through calibrations of customer weights and weight sets
Schematic of digital impedance bridge.

Farad and Impedance Metrology

Ongoing
This project aims to provide the world's best basis for accurate impedance measurements by tying the U.S. legal system of electrical units to the International
schematic diagram

Fundamental Constants in Nature

Ongoing
We are involved in efforts to collate data on precision measurements and the theoretical description of these measurements with the aim to improve the values of
Fourier transform spectrometer

High Resolution Atomic Spectroscopy

Ongoing
Accurate measurements of atomic wavelengths, energy levels, oscillator strengths and isotope and hyperfine structure using diffraction grating spectrographs
guide to the SI covers

International System of Units (SI)

Ongoing
The International System of Units (SI) provides definitions of units of measurement that are widely accepted in science and technology and which set measurement
rare earth ions in a host crystal

Memory

Ongoing
Critical to quantum information applications is the need to store a quantum state while other qbits are created or processed.
A line drawing of a woman's head styled like a classical carved bust

METIS

Ongoing
A new publication describes METIS, a Metrology Exchange to Innovate in Semiconductors We are seeking comments on the draft publication through February 16, 2024
metrology of the ohm team

Metrology of the Ohm

Ongoing
Resistance standards traceable to NIST provide references for measurements of current at levels from 3000 A to below 20 fA and are used to support a wide

Plasma Metrology

Ongoing
Experimental and computational techniques in support of commercial and scientific uses of plasmas.