Demonstration of a scalable, multiplexed ion trap for quantum information processing

TL;DR

This paper demonstrates a scalable, multiplexed ion trap design optimized for quantum computing, successfully testing multiple ion species and temperatures with promising ion lifetimes and measured heating rates.

Contribution

It introduces a scalable ion trap fabrication process suitable for large quantum systems, integrating control electronics and optics, and provides experimental validation with various ions and conditions.

Findings

Ion lifetimes up to several hours for Sr+ at 6 K

Measured motional heating rates for Mg+ and Sr+ ions

Successful testing of multiple ion species in the trap

Abstract

A scalable, multiplexed ion trap for quantum information processing is fabricated and tested. The trap design and fabrication process are optimized for scalability to small trap size and large numbers of interconnected traps, and for integration of control electronics and optics. Multiple traps with similar designs are tested with Cd+, Mg+, and Sr+ ions at room temperature and with Sr+ at 6 K, with respective ion lifetimes of 90 s, 300 +/- 30 s, 56 +/- 6 s, and 4.5 +/- 1.1 hours. The motional heating rate for Mg+ at room temperature and a trap frequency of 1.6 MHz is measured to be 7 +/- 3 quanta per millisecond. For Sr+ at 6 K and 540 kHz the heating rate is measured to be 220 +/- 30 quanta per second.