Parameterized Two-Qubit Gates for Enhanced Variational Quantum Eigensolver

• URL: http://arxiv.org/abs/2203.04978v2
• Date: Wed, 12 Oct 2022 07:37:09 GMT
• Title: Parameterized Two-Qubit Gates for Enhanced Variational Quantum Eigensolver
• Authors: S. E. Rasmussen and N. T. Zinner
• Abstract summary: We simulate a variational quantum eigensolver algorithm using fixed and parameterized two-qubit gates in the circuit ansatz. We show that the parameterized versions outperform the fixed versions, both when it comes to best energy and reducing outliers, for a range of Hamiltonians with applications in quantum chemistry and materials science.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: The variational quantum eigensolver is a prominent hybrid quantum-classical algorithm expected to impact near-term quantum devices. They are usually based on a circuit ansatz consisting of parameterized single-qubit gates and fixed two-qubit gates. We study the effect of parameterized two-qubit gates in the variational quantum eigensolver. We simulate a variational quantum eigensolver algorithm using fixed and parameterized two-qubit gates in the circuit ansatz and show that the parameterized versions outperform the fixed versions, both when it comes to best energy and reducing outliers, for a range of Hamiltonians with applications in quantum chemistry and materials science.

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