PreprintCC BY 4.0arXiv
Ancilla-assisted dark-state quantum gates in ultracold polar molecules
Abstract
High-fidelity entangling gates are useful for circuit-based quantum computing, yet their realization in a scalable platform is challenging. Optically trapped ultracold polar molecules offer a potentially scalable platform. Here, we introduce a two-qubit molecular entangling gate via a novel ancilla-assisted dark-state mechanism, where high fidelity is achievable. In particular, we find that by using appropriate qubit states for the ancilla and the data qubits, dark states can appear, and entanglement can emerge by driving the ancilla only. It is also feasible to extend the two-qubit gate to a multi-qubit gate via the same dark-state mechanism.
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BibTeX
@misc{lu2026ancillaassisted,
title = {{Ancilla-assisted dark-state quantum gates in ultracold polar molecules}},
author = {Yan Lu and Xiao-Feng Shi},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.18972},
eprint = {2609.18972},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.18972},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Ancilla-assisted dark-state quantum gates in ultracold polar molecules
AU - Yan Lu
AU - Xiao-Feng Shi
PY - 2026
DA - 2026/09/01
PB - arXiv
DO - 10.48550/arxiv.2609.18972
UR - https://arxiv.org/abs/2609.18972
AB - High-fidelity entangling gates are useful for circuit-based quantum computing, yet their realization in a scalable platform is challenging. Optically trapped ultracold polar molecules offer a potentially scalable platform. Here, we introduce a two-qubit molecular entangling gate via a novel ancilla-assisted dark-state mechanism, where high fidelity is achievable. In particular, we find that by using appropriate qubit states for the ancilla and the data qubits, dark states can appear, and entanglement can emerge by driving the ancilla only. It is also feasible to extend the two-qubit gate to a multi-qubit gate via the same dark-state mechanism.
ER -