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Cubic Phase Gate with a Trapped Ion Oscillator
Abstract
The motional modes of trapped ions are promising candidates for continuous-variable (CV) quantum computation and simulation. However, to achieve a universal gate set for CV quantum computation, anharmonic nonlinear unitaries are required. Here, we experimentally demonstrate a protocol that allows us to approximate the cubic phase gate. By numerically optimizing the phase angles and amplitudes of a set of state-dependent force pulses, we demonstrate the cubic phase gate for both vacuum and low-α coherent state inputs and verify its performance. Our protocol can also be extended to approximate other nonlinear unitaries.
Related
- Influence of fast and slow laser phase noise on the fidelity of the Mølmer-Sørensen trapped-ion gate
- Approximate cubic phase states in a trapped ion
- Exact Fock Amplitudes of the Cubic-Phase Gate on Arbitrary Pure Gaussian States
- Exponential-SWAP gate between bosonic motional modes of trapped ions
- A magnetic-field insensitive gate set for trapped-ion nuclear spin qubits
BibTeX
@misc{junsheng2026cubic,
title = {{Cubic Phase Gate with a Trapped Ion Oscillator}},
author = {Nigel Benjamin Lee Junsheng and Eugene Koh Jun Wei and Mu Young Kim and Dzmitry Matsukevich},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.34774},
eprint = {2609.34774},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.34774},
}
RIS
TY - UNPB
TI - Cubic Phase Gate with a Trapped Ion Oscillator
AU - Nigel Benjamin Lee Junsheng
AU - Eugene Koh Jun Wei
AU - Mu Young Kim
AU - Dzmitry Matsukevich
PY - 2026
DA - 2026/09/28
PB - arXiv
DO - 10.48550/arxiv.2609.34774
UR - https://arxiv.org/abs/2609.34774
AB - The motional modes of trapped ions are promising candidates for continuous-variable (CV) quantum computation and simulation. However, to achieve a universal gate set for CV quantum computation, anharmonic nonlinear unitaries are required. Here, we experimentally demonstrate a protocol that allows us to approximate the cubic phase gate. By numerically optimizing the phase angles and amplitudes of a set of state-dependent force pulses, we demonstrate the cubic phase gate for both vacuum and low-α coherent state inputs and verify its performance. Our protocol can also be extended to approximate other nonlinear unitaries.
ER -