Multipartite Entanglement in Rabi Driven Superconducting Qubits

• URL: http://arxiv.org/abs/2207.00130v3
• Date: Tue, 19 Jul 2022 18:21:39 GMT
• Title: Multipartite Entanglement in Rabi Driven Superconducting Qubits
• Authors: M. Lu, J. L. Ville, J. Cohen, A. Petrescu, S. Schreppler, L. Chen, C. J\"unger, C. Pelletti, A. Marchenkov, A. Banerjee, W. Livingston, J. M. Kreikebaum, D. Santiago, A. Blais, I. Siddiqi
• Abstract summary: We demonstrate a multi-qubit STAR (Sideband Tone Assisted Rabi driven) gate. Our scheme is inspired by the ion qubit Molmer-Sorensen gate and is mediated by a shared photonic mode and superconducting qubits. We achieve a two-qubit gate with maximum state fidelity of 0.95 in 310 ns, a three-qubit gate with state fidelity 0.905 in 217 ns, and a four-qubit gate with state fidelity 0.66 in 200 ns.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Exploring highly connected networks of qubits is invaluable for implementing various quantum algorithms and simulations as it allows for entangling qubits with reduced circuit depth. Here, we demonstrate a multi-qubit STAR (Sideband Tone Assisted Rabi driven) gate. Our scheme is inspired by the ion qubit M{\o}lmer-S{\o}rensen gate and is mediated by a shared photonic mode and Rabi-driven superconducting qubits, which relaxes restrictions on qubit frequencies during fabrication and supports scalability. We achieve a two-qubit gate with maximum state fidelity of 0.95 in 310 ns, a three-qubit gate with state fidelity 0.905 in 217 ns, and a four-qubit gate with state fidelity 0.66 in 200 ns. Furthermore, we develop a model of the gate that show the four-qubit gate is limited by shared resonator losses and the spread of qubit-resonator couplings, which must be addressed to reach high-fidelity operations.

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