S. N. Bose National Centre for Basic Sciences: Researchers Quantify Quantum Advantage Using Wigner Function Negativity

Researchers at the S. N. Bose National Centre for Basic Sciences have developed a method to quantify quantum advantage by leveraging the negativity of the Wigner function, a hallmark of quantum behavior. This approach reduces the need for exhaustive state measurements, which were previously required to confirm quantum advantage but became increasingly impractical. By using Wigner moments, the team demonstrates a scalable and efficient way to detect and measure nonclassical resources, paving the way for more practical quantum technologies.