萌妹社区


萌妹社区icists create new, simpler-than-ever quantum 'hard drive for light'

萌妹社区icists create new, simpler-than-ever quantum 'hard drive for light'
Lindsay LeBlanc, assistant professor of physics and Canada Research Chair in Ultracold Gases for Quantum Simulation. Leblanc, along with colleague Erhan Saglamyurek, have created a simpler-than-ever quantum "hard drive for light.". Credit: University of Alberta

萌妹社区icists at the University of Alberta in Canada have developed a new way to build quantum memories, a method for storing delicate quantum information encoded into pulses of light.

"We've developed a new way to store pulses of 鈥攄own to the single-photon level鈥攊n clouds of ultracold rubidium atoms, and to later retrieve them, on-demand, by shining a 'control' pulse of light," said Lindsay LeBlanc, assistant professor of physics and Canada Research Chair in Ultracold Gases for Quantum Simulation. LeBlanc conducted this research with postdoctoral fellow Erhan Saglamyurek.

Quantum memories are an important component of quantum networks, serving much the same role as hard drives in today's computers. And the interest in storing quantum data efficiently and effectively is only growing, with practical applications including a quantum fibre-optic internet and other methods of secure communication.

"This experiment involved taking short pulses of light, in which we could encode quantum information, storing the light in the atoms, and then retrieving the original that carries the same information," explained Saglamyurek.

The novel method developed by LeBlanc and Saglamyurek, which is best-suited for key applications requiring high-speed operation, also has considerably fewer technical requirements than required in common quantum storage techniques. "The amount of power needed, for example, is significantly lower than current options, and these reduced requirements make it easier to implement in other labs," added Saglamyurek. This discovery will allow for the crucial scaling up of technologies, which has proven the biggest challenge to date in the emerging field.

The research team also included two graduate students working in LeBlanc's lab, Taras Hrushevskyi and Anindya Rastogi, and Khabat Heshami from the National Research Council in Ottawa. The paper, "Coherent storage and manipulation of broadband photons via dynamically controlled Autler-Townes splitting," was published in Nature Photonics.

More information: Erhan Saglamyurek et al, Coherent storage and manipulation of broadband photons via dynamically controlled Autler鈥揟ownes splitting, Nature Photonics (2018).

Journal information: Nature Photonics

Provided by University of Alberta

Citation: 萌妹社区icists create new, simpler-than-ever quantum 'hard drive for light' (2018, November 5) retrieved 28 May 2025 from /news/2018-11-physicists-simpler-than-ever-quantum-hard.html
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.

Explore further

Researchers achieve multifunctional solid-state quantum memory

177 shares

Feedback to editors