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Quantum Chemistry
Ancilla-assisted dark-state quantum gates in ultracold polar molecules
arXiv
Authors: Yan Lu, Xiao-Feng Shi
Year
2026
Paper ID
78339
Status
Preprint
Abstract Read
~2 min
Abstract Words
95
Citations
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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.
Why This Paper Matters
- This paper contributes to the Quantum Chemistry research area in the Quantum Articles archive.
- It adds a 2026 reference point for readers tracking recent quantum research.
- High-fidelity entangling gates are useful for circuit-based quantum computing, yet their realization in a scalable platform is challenging.
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