Advancing hybrid quantum–classical computation with real-time execution

• DOI: 10.3389/fphy.2022.940293
• Publication Date: 2022-08-05T05:42:07Z
• Authors: Thomas Lubinski; Cassandra Granade; Amos Anderson; Alan Geller; Martin Roetteler; Andrei Petrenko; Bettina Heim
• Keywords: Quantum circuit

The use of mid-circuit measurement and qubit reset within quantum programs has been introduced recently several applications demonstrated that perform conditional branching based on these measurements. In this work, we go a step further describe next-generation implementation classical computation embedded enables the real-time calculation adjustment program variables state measured qubits. A full-featured Quantum Intermediate Representation (QIR) model is used to circuit including its computation. This integrated approach eliminates need evaluate store potentially prohibitive volume data in order explore multiple solution paths. It new type algorithm requires fewer round-trips between an external driver execution program, significantly reducing computational latency, as much can be performed during coherence time execution. We review practical challenges implementing along with developments underway address challenges. An novel powerful programming pattern, random walk phase estimation algorithm, physical computer analysis benefits feasibility compared existing computing methods.