Abstract
Quantum information processing is steadily progressing from a purely academic discipline towards applications throughout science and industry. Transitioning from lab-based, proof-of-concept experiments to robust, integrated realizations of quantum information processing hardware is an important step in this process. However, the nature of traditional laboratory setups does not offer itself readily to scaling up system sizes or allow for applications outside of laboratory-grade environments. This transition requires overcoming challenges in engineering and integration without sacrificing the state-of-the-art performance of laboratory implementations. Here, we present a 19-inch rack quantum computing demonstrator based on $^{40}\textrm{Ca}^+$ optical qubits in a linear Paul trap to address many of these challenges. We outline the mechanical, optical, and electrical subsystems. Further, we describe the automation and remote access components of the quantum computing stack. We conclude by describing characterization measurements relevant to digital quantum computing including entangling operations mediated by the Molmer-Sorenson interaction. Using this setup we produce maximally-entangled Greenberger-Horne-Zeilinger states with up to 24 ions without the use of post-selection or error mitigation techniques; on par with well-established conventional laboratory setups.
Highlights
Quantum information processing as a computational paradigm has been proposed as an efficient means to tackle computational challenges throughout science and industry [1,2,3,4,5,6]
In this work we present the first phase of our efforts towards a compact, 50-qubit quantum computing demonstrator based on trapped ions as part of the AQTION (Advanced Quantum computation with Trapped IONs) collaboration
It is centered around a Xilinx Zynq system on chip, which holds both a field programmable gate arrays (FPGAs) core used for low-level deterministic signal handling, and a dual core 667 MHz ARM A9 CPU suitable for higher-level control and real-time computations
Summary
Quantum information processing as a computational paradigm has been proposed as an efficient means to tackle computational challenges throughout science and industry [1,2,3,4,5,6]. The shift in development of quantum computers from small-scale, expert-user devices to integrated, end-user-centric systems is analogous to the history of classical computation It presents a host of new challenges such as manufacturing many, effectively identical qubits, and improving the scaling in a number of control and readout lines, while maintaining low error rates [24,25,26]. In this work we present the first phase of our efforts towards a compact, 50-qubit quantum computing demonstrator based on trapped ions as part of the AQTION (Advanced Quantum computation with Trapped IONs) collaboration It features a 1.7 × 1 m2 footprint with high mechanical stability, and scalable control electronics. IV we turn to characterization measurements on the composite system
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