Most quantum processors rely on native interactions between pairs of qubits to generate quantum entangling gates. Now, by modulating the driving laser fields, gates that entangle a triplet or quartet of trapped-ion qubits have been realized, creating useful new components for quantum computing applications.
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References
Monroe, C. et al. Programmable quantum simulations of spin systems with trapped ions. Rev. Mod. Phys. 93, 025001 (2021). This review article covers trapped-ion technology and its use in quantum simulations of spin systems.
Blatt, R. & Wineland, D. Entangled states of trapped atomic ions. Nature 452, 1008–1015 (2008). This review article presents two-qubit entangling gates between trapped-ion qubits.
Sørensen, A. & Mølmer, K. Entanglement and quantum computation with ions in thermal motion. Phys. Rev. A 62, 022311 (2000). This paper introduces two-qubit entangling gates, now implemented widely in trapped-ion systems.
Katz, O., Cetina, M. & Monroe, C. N-body interactions between trapped ion qubits via spin-dependent squeezing. Phys. Rev. Lett. 129, 063603 (2022). This paper describes a proposal to realize N-body interactions between trapped-ion qubits.
Katz, O., Cetina, M. & Monroe, C. Programmable N-body interactions with trapped ions. Preprint at https://arxiv.org/abs/2207.10550 (2022). This preprint outlines techniques to apply N-body interactions in long ion chains.
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This is a summary of: Katz, O. et al. Demonstration of three- and four-body interactions between trapped-ion spins. Nat. Phys. https://doi.org/10.1038/s41567-023-02102-7 (2023).
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Quantum entangling gates using three and four qubits. Nat. Phys. 19, 1396–1397 (2023). https://doi.org/10.1038/s41567-023-02105-4
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DOI: https://doi.org/10.1038/s41567-023-02105-4
