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TU Delft Researchers Develop Quantum Memory that Operates at Telecom Wavelengths; Long-Term Potential Use in Quantum Networks

By IQT News posted 16 Jun 2020

(Phys.org) Researchers at Delft University of Technology (TU Delft) set out to develop a new mechanical quantum memory with sufficiently long storage times, a high readout efficiency, and the ability to operate at telecom wavelengths. The memory they devised, presented in a paper published in Nature Physics, could ultimately enable the practical implementation of mechanical systems with quantum effects developed in their previous works.
“We’ve been working on showing quantum effects of mechanical systems for quite a few years now, and have been quite successful in realizing various quantum states, so we’ve really been pushing them toward a quantum information processing direction,” Simon Gröblacher, professor at TU Delft, whose research group carried out the study.
“The general goal of our study was to show that mechanics can in fact be used as a quantum memory and we achieved this,” Gröblacher said. “Remarkably, it is the first time that anyone has shown this.”
Over the next couple of years, Gröblacher and his colleagues hope that they will be able to improve their quantum memory’s performance further to facilitate its practical implementation. Moreover, the optical scheme they proposed could inspire the development of other quantum memory components. The researchers’ ultimate goal is to use the quantum memory they created to enable large quantum networks.
“The main application for our memory would be as part of a quantum network or quantum repeater,” Gröblacher said.

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