The article discusses the history and development of NIST’s quantum voltage standards based on superconductivity. Superconductivity, discovered in 1911, allows certain materials to conduct electricity without resistance when cooled below a specific temperature. NIST has developed a series of voltage standards using superconducting Josephson junctions over the past four decades. These standards are widely used worldwide for calibrating voltmeters in various industries, government, and military applications. The development of these standards reflects the pursuit of precision and accuracy in measurement, leveraging the unique properties of superconductivity.
Source: https://www.nist.gov/pml/history-nist-quantum-voltage-standards
Keywords: Superconductivity, Voltage standards, Josephson junctions, Quantum mechanics, Precision measurements
