APS March Meeting 2023

Circuit knitting toolbox and quantum serverless

View publication


During the near term quantum computers era of quantum computing, while quantum computers are still very noisy, it will be important to work in a direction of composable solutions that reduces the size of given problems and handles problem execution on classical-quantum backends. Along that line of effort, 2 supporting solutions were developed: circuit knitting toolbox and quantum serverless framework. The circuit knitting toolbox is a collection of algorithms which aim to decompose a quantum circuit into collection of smaller circuits, evaluate the subcircuits on a quantum processor, and then recompose those results into an estimation of the result of the full-sized circuit. Quantum serverless is a programming model to orchestrate classical and quantum resources for problem solving. Attendees of this talk will learn how to use entanglement forging to estimate the ground state energy of a molecule, using half the number of qubits, and how to use circuit cutting to find optimal cut points on a circuit, cut the circuit into its parts, and reconstruct an estimation of the circuit using the sub-experiments. They will also learn how QuantumServerless can be leveraged to parallelize quantum experiments and offload expensive classical calculations to high-performance backends.