Error-mitigated photonic variational quantum eigensolver using a single-photon ququart
- Journal
- Optica
- Page
- 88
- Year
- 2022
We apply our photonic VQE to estimate the ground state energy of the He − H+ cation. Simulation and experimental results demonstrate that our experimental resource-efficient photonic VQE can accurately estimate the bond dissociation curve, even in the presence of large noise in the quantum processing unit. We also discuss further possible resource-efficient enhancement of the Hilbert space in photonic quantum processors. Our results propose that photonic systems utilizing multiple degrees of freedom can provide a resource-efficient avenue to implement practical near-term quantum processor