New algorithm uses a hologram to control trapped ions — ScienceDaily

Researchers have learned the most specific way to manage specific ions employing holographic optical engineering technology.

The new technology uses the very first recognised holographic optical engineering system to manage trapped ion qubits. This technology promises to support produce additional specific controls of qubits that will assist the improvement of quantum market-certain components to further new quantum simulation experiments and potentially quantum mistake correction procedures for trapped ion qubits.

“Our algorithm calculates the hologram’s profile and eliminates any aberrations from the light, which allows us develop a highly specific system for programming ions,” says lead writer Chung-You Shih, a PhD scholar at the College of Waterloo’s Institute for Quantum Computing (IQC).

Kazi Rajibul Islam, a faculty member at IQC and in physics and astronomy at Waterloo is the lead investigator on this perform. His team has been trapping ions made use of in quantum simulation in the Laboratory for Quantum Data due to the fact 2019 but required a specific way to manage them.

A laser aimed at an ion can “talk” to it and alter the quantum condition of the ion, forming the constructing blocks of quantum information processing. Nonetheless, laser beams have aberrations and distortions that can result in a messy, broad target spot, which is a challenge due to the fact the length between trapped ions is a few micrometers — substantially narrower than a human hair.

The laser beam profiles the team wished to stimulate the ions would require to be specifically engineered. To obtain this they took a laser, blew its light up to 1cm broad and then despatched it by means of a digital micromirror system (DMD), which is programable and features as a film projector. The DMD chip has two-million micron-scale mirrors on it that are independently managed employing electric powered voltage. Employing an algorithm that Shih created, the DMD chip is programmed to display screen a hologram sample. The light produced from the DMD hologram can have its intensity and phase precisely managed.

In tests, the team has been capable to manipulate each individual ion with the holographic light. Preceding analysis has struggled with cross talk, which suggests that if a laser focuses on a single ion, the light leaks on the bordering ions. With this system, the team effectively characterizes the aberrations employing an ion as a sensor. They can then cancel the aberrations by modifying the hologram and obtain the most affordable cross talk in the environment.

“There is a problem in employing commercially out there DMD technology,” Shih says. “Its controller is designed for projectors and UV lithography, not quantum experiments. Our upcoming phase is to develop our own components for quantum computation experiments.”

This analysis was supported in element by the Canada 1st Analysis Excellence Fund by means of Transformative Quantum Technologies.

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Components furnished by College of Waterloo. Note: Material could be edited for type and length.