Friday 18th November, 14:00
Richard Meister and Cica Gustiani will cover their papers Exploring ab initio machine synthesis of quantum circuits (https://arxiv.org/abs/2206.11245) and Exploiting subspace constraints and ab initio variational methods for quantum chemistry (https://arxiv.org/abs/2206.11246).
The first talk will give an introduction to a method for automated synthesis of quantum circuits, which is expected to be one of the key ingredients to the deployment of quantum algorithms: We give insights to some of the important implementation features and report the performance for generating circuits of some key tasks, including the quantum Fourier transform, on various sets of gates. Using these sample problems, we highlight the advanced capabilities, but also some limitations of the investigated method.
The second talk will cover applications in solving some chemistry problems: finding the ground state of a Hamiltonian and synthesising shallow circuits which implement the time-evolution operator. Our method is agnostic to the Hamiltonian and can operate without or with a trivial knowledge of the (molecular) system; nevertheless, it can outperform human-designed circuits. Moreover, when the circuit evolution is constrained to the physically relevant subspace, the performance and compactness of the circuits are improved even further.
The talks will each be roughly 15-20 minutes long, with some time for questions after every talk.
