**Quantum Anomalous Hall Effect (QAHE) Standard**
Scientists at the National Institute of Standards and Technology (NIST) are working on a new quantum standard for electrical measurements, called the Quantum Anomalous Hall Effect (QAHE). This standard could allow voltage and resistance standards to be created in a single device.
**Current Status**
The QAHE has been demonstrated by scientists, but current materials require cooling to extremely low temperatures using bulky refrigeration systems. New research suggests that some materials can exhibit QAHE at higher temperatures, making it possible to create a portable system.
**Potential Impact**
An all-in-one electronic calibration system based on QAHE could revolutionize electrical measurements in industry, military, and research settings. It would enable companies to perfect and distribute their own calibration systems instead of relying on NIST’s services. This would save time and money by allowing stakeholders to recreate standards locally.
**Implementation Timeframe**
While significant progress has been made, further research is needed before an all-in-one system can be designed. Collaborations between NIST scientists and leading researchers aim to accelerate this process.
Key technical points:
* The Quantum Anomalous Hall Effect generates an SI resistance standard without requiring a magnetic field.
* Current materials need cooling below 0.02°C above absolute zero; new advances suggest higher-temperature operation is possible.
* A simple physics equation like Ohm’s law allows electric current standards to be realized directly from voltage and resistance standards.
This development holds promise for advancing error-resistant quantum computing technologies as well as improving precision in various fields through better control over electricity flow
Source: https://www.nist.gov/noac/toward-all-one-electrical-standards-quantum-anomalous-hall-effect
Keywords: Quantum Anomalous Hall Effect, Topological Materials, Portable Cryostat
