Mandal Indian Institute of Science: Researchers Halve Quantum Algorithm Shots and Cut Energy Use by 62%
Until now, executing algorithms on quantum computers has required a costly and often excessive number of repeated calculations, known as shots, to ensure reliable results. The Indian Institute of Science (IISc) team of Prateek Kulkarni and Sumit Mandal have, for the first time, developed an analytical expression to determine the optimal number of shots, approximately 8000 in their tests, needed for reliable quantum algorithm execution. The team has devised a new way to calculate the fewest repetitions, called ‘shots’, needed for accurate results when running calculations on quantum computers. This analytical model reduces the number of shots required by approximately 58% compared to current methods, also lessening energy consumption. Furthermore, a new technique for distributing these shots across different parts of a quantum calculation lowers errors by up to 73%, enabling more complex algorithms to be executed. The researchers at the Institute of Science (IISc) have developed a new analytical model to optimise the number of repeated calculations, or ‘shots’, needed for reliable quantum algorithm execution. Executing a quantum algorithm is akin to following a recipe; however, due to the inherent instability of quantum systems, the ‘recipe’ must be repeated many times to confirm the result is accurate. Currently, this process requires a substantial number of shots, increasing computational cost and energy consumption. The IISc team’s model reduces this requirement by approximately 58%. Crucially, they also introduced a technique for distributing these shots across different sections of a quantum calculation, dividing a complex task into smaller stages, reducing errors by up to 73%. Optimal shot allocation and circuit partitioning minimise quantum computation errors and energy use Error rates dropped to 73% compared to conventional approaches when employing the new analytical model and shot allocation technique developed by the Indian Institute of Science (IISc). The
