Error-mitigated photonic variational quantum eigensolver using a single-photon ququart

• URL: http://arxiv.org/abs/2109.14244v1
• Date: Wed, 29 Sep 2021 07:41:36 GMT
• Title: Error-mitigated photonic variational quantum eigensolver using a single-photon ququart
• Authors: Donghwa Lee, Jinil Lee, Seongjin Hong, Hyang-Tag Lim, Young-Wook Cho, Sang-Wook Han, Hyundong Shin, Junaid ur Rehman, Yong-Su Kim
• Abstract summary: We report the experimental resource-efficient implementation of the variational quantum eigensolver (VQE) using four-dimensional photonic quantum states of single-photons. The four-dimensional quantum states are implemented by utilizing polarization and path degrees of freedom of a single-photon.
• Score: 6.963325803328705
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We report the experimental resource-efficient implementation of the variational quantum eigensolver (VQE) using four-dimensional photonic quantum states of single-photons. The four-dimensional quantum states are implemented by utilizing polarization and path degrees of freedom of a single-photon. Our photonic VQE is equipped with the quantum error mitigation (QEM) protocol that efficiently reduces the effects of Pauli noise in the quantum processing unit. We apply our photonic VQE to estimate the ground state energy of He--H$^{+}$ cation. The simulation and experimental results demonstrate that our resource-efficient photonic VQE can accurately estimate the bond dissociation curve, even in the presence of large noise in the quantum processing unit.

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