Papers › A Generic Compilation Strategy for the Unitary Coupled Cluster Ansatz
A Generic Compilation Strategy for the Unitary Coupled Cluster Ansatz
Alexander Cowtan, Will Simmons, Ross Duncan
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We describe a compilation strategy for Variational Quantum Eigensolver (VQE) algorithms which use the Unitary Coupled Cluster (UCC) ansatz, designed to reduce circuit depth and gate count. This is achieved by partitioning Pauli exponential terms into mutually commuting sets. These sets are then diagonalised using Clifford circuits and synthesised using the phase polynomial formalism. This strategy reduces cx depth by 75.4% on average, and by up to 89.9%, compared to naive synthesis for a variety of molecules, qubit encodings and basis sets.
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