**Quantum Standard: AC and DC Bipolar Voltage Source**
The article discusses a new quantum standard for measuring voltage, specifically bipolar (both positive and negative) ac and dc voltages. This is achieved using a Josephson circuit that leverages the unique properties of Josephson junctions.
**Organizations Involved:** The National Institute of Standards and Technology (NIST)
**Current Status:** Proposed solution to create an accurate bipolar voltage source
**Potential Impact:** Enables creation of highly accurate bipolar voltage sources for various applications in metrology, calibration, and beyond. This will improve measurement accuracy in fields like physics, chemistry, and engineering.
**Implementation Timeframe:** Not specified in the article
Key technical points:
* The invention uses Josephson technology to generate precise control over both positive and negative polarity voltage pulses.
* It eliminates variations in voltage, phase, and timing that hinder metrological accuracy.
* By utilizing quantum mechanical characteristics of the Josephson junctions, it provides a stable source of high-accuracy bipolar voltages.
Source: https://www.nist.gov/patents/ac-and-dc-bipolar-voltage-source-using-quantized-pulses
Keywords: Josephson junction, Quantum mechanical characteristics, Bipolar voltage source
