Fast design and scaling of multi-qubit gates in large-scale trapped-ion quantum computers

• URL: http://arxiv.org/abs/2307.09566v1
• Date: Fri, 14 Jul 2023 21:01:14 GMT
• Title: Fast design and scaling of multi-qubit gates in large-scale trapped-ion quantum computers
• Authors: Yotam Shapira, Lee Peleg, David Schwerdt, Jonathan Nemirovsky, Nitzan Akerman, Ady Stern, Amit Ben Kish, Roee Ozeri
• Abstract summary: Quantum computers based on crystals of trapped ions are a prominent technology for quantum computation. Here we introduce a method that vastly reduces the computational challenge, effectively allowing for the design of fast and programmable entanglement gates. Our method delineates a path towards scaling up quantum computers based on ion-crystals with 100s of qubits.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Quantum computers based on crystals of electrically trapped ions are a prominent technology for quantum computation. A unique feature of trapped ions is their long-range Coulomb interactions, which come about as an ability to naturally realize large-scale multi-qubit entanglement gates. However, scaling up the number of qubits in these systems, while retaining high-fidelity and high-speed operations is challenging. Specifically, designing multi-qubit entanglement gates in long ion crystals of 100s of ions involves an NP-hard optimization problem, rendering scaling up the number of qubits a conceptual challenge as well. Here we introduce a method that vastly reduces the computational challenge, effectively allowing for a polynomial-time design of fast and programmable entanglement gates, acting on the entire ion crystal. We use this method to investigate the utility, scaling and requirements of such multi-qubit gates. Our method delineates a path towards scaling up quantum computers based on ion-crystals with 100s of qubits.

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