Internet may see quantum speed boost via acoustic data storage

Internet may see quantum speed boost via acoustic data storage
by Robert Schreiber
Berlin, Germany (SPX) Apr 2, 2024

At the Niels Bohr Institute of the University of Copenhagen, a novel form of quantum memory has been developed using a small drum to store data originally sent by light, which is then converted into sonic vibrations. This can later be re-emitted as light signals when required. The innovative method demonstrates that mechanical memory for quantum data could lead to a secure and high-speed internet.

Beneath the former office of Niels Bohr, a basement scattered with tables laden with mirrors, lasers, and various devices presents the appearance of a complex child's project. Here, in a space governed by subatomic rules that defy traditional physics, researchers are at the forefront of quantum technology.

A standout project among these is the quantum drum, a visible membrane that achieves quantum states when struck by laser light. Its ability to maintain these states without disturbance has spurred various quantum technological advancements.

In collaboration across different quantum specialties, the institute has shown that the drum plays a vital role in the potential network of quantum computers. This "quantum memory" turns light signals into sonic vibrations, a method now confirmed through a recent research article.

Mads Bjerregaard Kristensen, a postdoctoral researcher at the institute and lead author of the study, emphasized the importance of quantum memory. "Quantum memory is likely to be fundamental for sending quantum information over distances, representing a crucial component for a future quantum internet," he stated.

The challenge of maintaining quantum data over long distances is exacerbated by noise in transmission mediums such as fiber-optic cables. Quantum data, unlike classical data, cannot be easily amplified without risking its integrity. The quantum drum, however, may address this by preserving and retransmitting quantum data without it decohering.

Albert Schliesser, a professor at the institute and co-author of the article, noted the flexibility of their mechanical system over atomic systems, which are more rigid in design and interaction capabilities. "Our drum can be adapted if new discoveries change the quantum computation landscape," he explained.

The drum's effectiveness in handling various light frequencies and its extended memory time suggest its potential as a foundational technology for quantum networks and quantum computer hardware.

"We are early in our exploration of quantum computing and communication, but the advancements we've made with the quantum drum's memory capabilities are promising for its future applications as quantum RAM," added Schliesser.

Research Report:The method, detailed in the article published in "Long-lived and Efficient Optomechanical Memory for Light," involves an auxiliary laser to stabilize natural vibrations in the drum, making it highly sensitive to quantum signals. This could revolutionize the way quantum information is stored and transferred, ensuring security and efficiency over long distances.