Ultra-low vibration closed-cycle cryogenic surface-electrode ion trap apparatus

TL;DR

This paper presents a cryogenic ion trap apparatus with ultra-low vibrations suitable for quantum computing, featuring integrated signal lines, effective vibration isolation, and successful trapping of Be+ ions.

Contribution

It introduces a novel cryogenic ion trap system with advanced vibration isolation and integrated control lines, enabling stable ion trapping for quantum applications.

Findings

Residual vibration amplitude of ~10 nm rms

Over 1.3 W cooling power at 5 K available

Successful trapping of $^9$Be$^+$ ions

Abstract

We describe the design, commissioning and operation of an ultra-low-vibration closed-cycle cryogenic ion trap apparatus. One hundred lines for low-frequency signals and eight microwave / radio frequency coaxial feed lines offer the possibility of implementing a small-scale ion-trap quantum processor or simulator. With all supply cables attached, more than 1.3 W of cooling power at 5 K is still available for absorbing energy from electrical pulses introduced to control ions. The trap itself is isolated from vibrations induced by the cold head using a helium exchange gas interface. The performance of the vibration isolation system has been characterized using a Michelson interferometer, finding residual vibration amplitudes on the order of 10 nm rms. Trapping of $^9$Be$^+$ ions has been demonstrated using a combination of laser ablation and photoionization.