The problem with many quantum programs right now is that the programs require more qubits than are available in the current hardware. To help improve upon the situation, the U.S. Defense Advanced Research Projects Agency (DARPA) has awarded Xanadu with a grant to develop a compiler that can cut up the program and run it in pieces on smaller quantum hardware or classical simulators that are limited in the number of qubits they can simulate. The compiler will attempt to automatically break down a circuit into a multi-circuit hybrid model and leverage both classical and quantum computing resources for execution. There are challenges in developing such a compiler including determining ways to stitch back together the individual piece-wise simulations as well as ensuring there is a minimum loss of solution accuracy with this approach. The research for this development will be funded over a 24 month period by the grant. Additional details are available in a news release from Xanadu which can be found here.
July 20, 2021