Parameterized Two-Qubit Gates for Enhanced Variational Quantum Eigensolver

TY - JOUR

T1 - Parameterized Two-Qubit Gates for Enhanced Variational Quantum Eigensolver

AU - Rasmussen, Stig Elkjær

AU - Zinner, Nikolaj Thomas

PY - 2022/12

Y1 - 2022/12

N2 - 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. The effect of parameterized two-qubit gates in the variational quantum eigensolver is studied. A variational quantum eigensolver algorithm is simulated using fixed and parameterized two-qubit gates in the circuit ansatz and it is shown 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.

AB - 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. The effect of parameterized two-qubit gates in the variational quantum eigensolver is studied. A variational quantum eigensolver algorithm is simulated using fixed and parameterized two-qubit gates in the circuit ansatz and it is shown 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.

KW - quantum circuits

KW - quantum technology

KW - variational quantum algorithms

UR - http://www.scopus.com/inward/record.url?scp=85139526794&partnerID=8YFLogxK

U2 - 10.1002/andp.202200338

DO - 10.1002/andp.202200338

M3 - Journal article

AN - SCOPUS:85139526794

SN - 0003-3804

VL - 534

JO - Annalen der Physik

JF - Annalen der Physik

IS - 12

M1 - 2200338

ER -