Penning micro-trap for quantum computing

TL;DR

This paper introduces a Penning micro-trap for quantum computing that replaces radio-frequency fields with a magnetic field, enabling scalable ion control and transport for large-scale quantum applications.

Contribution

It presents a novel micro-fabricated Penning trap that overcomes scaling challenges of RF traps by using a magnetic field, allowing full quantum control and ion transport.

Findings

Successful demonstration of quantum control of an ion in the Penning trap.

Ability to transport ions arbitrarily within the trap plane.

Potential for improved scalability in quantum computing architectures.

Abstract

Trapped ions in radio-frequency traps are among the leading approaches for realizing quantum computers, due to high-fidelity quantum gates and long coherence times. However, the use of radio-frequencies presents a number of challenges to scaling, including requiring compatibility of chips with high voltages, managing power dissipation and restricting transport and placement of ions. By replacing the radio-frequency field with a 3 T magnetic field, we here realize a micro-fabricated Penning ion trap which removes these restrictions. We demonstrate full quantum control of an ion in this setting, as well as the ability to transport the ion arbitrarily in the trapping plane above the chip. This unique feature of the Penning micro-trap approach opens up a modification of the Quantum CCD architecture with improved connectivity and flexibility, facilitating the realization of large-scale trapped-ion quantum computing, quantum simulation and quantum sensing.