Distributed variational quantum computing with deterministic entanglement tuning
Abstract
Distributed quantum computing offers a scalable route to quantum information processing by entangling spatially separated processors. Although gate teleportation enables universal computation across distributed nodes, it requires repeated consumption of high-fidelity Bell pairs, ancillary qubits, and real-time feedforward, which imposes significant overhead and reduces fidelity. However, many variational quantum algorithms do not demand full universality; rather, they rely on sufficient expressibility to explore solution spaces effectively. Building on this, we propose a distributed variational quantum computing protocol based on deterministic entanglement tuning. In contrast to probabilistic filtering, our approach deterministically modulates pre-shared entanglement using only local operations and classical communication. We validate the protocol through a proof-of-principle experiment by estimating ground-state energies of the He-H+ molecule and the Schwinger model, showing that diverse entanglement levels can be engineered to match problem-specific requirements. Our results suggest a practical alternative for near-term distributed quantum applications.
Versions
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BibTeX
@misc{kim2026distributed,
title = {{Distributed variational quantum computing with deterministic entanglement tuning}},
author = {Ilhwan Kim and Yong-Su Kim and Kwang Jo Lee and Hyukjoon Kwon and Yosep Kim and Hyang-Tag Lim},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.10932},
eprint = {2609.10932},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.10932},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Distributed variational quantum computing with deterministic entanglement tuning
AU - Ilhwan Kim
AU - Yong-Su Kim
AU - Kwang Jo Lee
AU - Hyukjoon Kwon
AU - Yosep Kim
AU - Hyang-Tag Lim
PY - 2026
DA - 2026/09/10
PB - arXiv
DO - 10.48550/arxiv.2609.10932
UR - https://arxiv.org/abs/2609.10932
AB - Distributed quantum computing offers a scalable route to quantum information processing by entangling spatially separated processors. Although gate teleportation enables universal computation across distributed nodes, it requires repeated consumption of high-fidelity Bell pairs, ancillary qubits, and real-time feedforward, which imposes significant overhead and reduces fidelity. However, many variational quantum algorithms do not demand full universality; rather, they rely on sufficient expressibility to explore solution spaces effectively. Building on this, we propose a distributed variational quantum computing protocol based on deterministic entanglement tuning. In contrast to probabilistic filtering, our approach deterministically modulates pre-shared entanglement using only local operations and classical communication. We validate the protocol through a proof-of-principle experiment by estimating ground-state energies of the He-H^+ molecule and the Schwinger model, showing that diverse entanglement levels can be engineered to match problem-specific requirements. Our results suggest a practical alternative for near-term distributed quantum applications.
ER -