Lee, Donghwa Bilash, Bohdan Lee, Jaehak Lim, Hyang-Tag Kim, Yosep Lee, Seung-Woo Kim, Yong-Su 2026-02-19T06:00:46Z 2026-02-19T06:00:46Z 2026-02-19 2026-01 2056-6387 https://pubs.kist.re.kr/handle/201004/154316 We demonstrate a two-qubit variational quantum eigensolver (VQE) implementation using two spatially separated single-photon processors connected via a 3 km optical fiber network. Our approach leverages local operations on pre-shared entanglement to evaluate two-qubit Hamiltonians. By incorporating parameterized weak measurement operations within the local operations framework, we enable access to the complete Hilbert space across distributed quantum processors – a capability typically requiring complex non-local operations. Our experimental results show accurate ground state energy estimation for Hamiltonians including H-He+ cation and the Schwinger model, validating both the necessity of weak measurements and high-quality entanglement in distributed quantum computing. This work establishes a promising direction for resource-efficient, scalable quantum network architectures that maintain full computational capabilities through local operations and controlled entanglement manipulation. English The University of New South Wales (UNSW Australia) | Nature Publishing Group Distributed photonic variational quantum eigensolver with parameterized weak measurements Article 10.1038/s41534-025-01163-1 1 npj Quantum Information, v.12, no.1 npj Quantum Information 12 1 Y scie 001672876100001 2-s2.0-105028872503 Quantum Science & Technology Physics, Applied Physics, Atomic, Molecular & Chemical Physics, Condensed Matter Physics Article ENTANGLEMENT GATE