A scalable helium gas cooling system for trapped-ion applications. (1st April 2022)

• Record Type: Journal Article
• Authors: Lebrun-Gallagher, F R; Johnson, N I; Akhtar, M; Weidt, S; Bretaud, D; Hile, S J; Owens, A; Bonus, F; Hensinger, W K
• Is Part Of: Quantum science and technology. Volume 7:Number 2(2022)
• Publication Date: 2022-04-01
• Subjects: cryogenic ion-trap system -- closed-loop cryogenic system -- scalable quantum computing architecture; Quantum theory -- Periodicals; Quantum theory; Periodicals; 530
• DOI: 10.1088/2058-9565/ac5d7d
• Languages: English
• ISSNs: 2058-9565

Abstract

Abstract: Microfabricated ion-trap devices offer a promising pathway towards scalable quantum computing. Research efforts have begun to focus on the engineering challenges associated with developing large-scale ion-trap arrays and networks. However, increasing the size of the array and integrating on-chip electronics can drastically increase the power dissipation within the ion-trap chips. This leads to an increase in the operating temperature of the ion-trap and limits the device performance. Therefore, effective thermal management is an essential consideration for any large-scale architecture. Presented here is the development of a modular cooling system designed for use with multiple ion-trapping experiments simultaneously. The system includes an extensible cryostat that permits scaling of the cooling power to meet the demands of a large network. Following experimental testing on two independent ion-trap experiments, the cooling system is expected to deliver a net cooling power of 111 W at ∼70 K to up to four experiments. The cooling system is a step towards meeting the practical challenges of operating large-scale quantum computers with many qubits.