2023-12-13 23:10:00
Coherent information transmission in the electromagnetic spectrum: a crucial step for advanced quantum networks
The ability to transmit information coherently across the band of the electromagnetic spectrum, from microwave to infrared, is vitally important to the development of advanced quantum networks used in computing and communications. A recent study highlighted the use of nanoscale optomechanical cavities to achieve this goal.
A study carried out by researchers from the State University of Campinas (UNICAMP) in Brazil, in collaboration with colleagues from ETH Zurich in Switzerland and TU Delft in the Netherlands, focused on the use of nanoscale optomechanical cavities for this purpose.
Ces nanoscale resonators promote the interaction between high-frequency mechanical vibrations and infrared light at wavelengths used by the telecommunications industry.
Nanomechanical resonators
« Nanomechanical resonators act as bridges between superconducting circuits and optical fibers. Superconducting circuits are currently among the most promising technologies for quantum computing, while optical fibers are commonly used as long-distance information transmitters with little noise and no signal loss », Specified Thiago Alegre, professor at the Gleb Wataghin Institute of Physics (IFGW-UNICAMP) and author of the article.
The introduction of dissipative optomechanics
According to the scientist, one of the key innovations of the study was the introduction of dissipative optomechanics. Traditional optomechanical devices rely on a purely dispersive interaction, where only photons confined within the cavity are effectively dispersed.
In dissipative optomechanics, photons can be directly scattered from the waveguide to the resonator. “ The optoacoustic interaction can be more tightly controlled accordingly “, he added.
Prospects for even more efficient devices
Prior to this study, dissipative optomechanical interaction had only been demonstrated at low mechanical frequencies, precluding important applications such as quantum state transfer between the photonic (optical) and phononic (mechanical) domains.
The study demonstrated the first dissipative optomechanical system operating in a regime where the mechanical frequency exceeded the optical line width.
« We successfully increased the mechanical frequency by two orders of magnitude and achieved a tenfold increase in the optomechanical coupling rate. This offers very promising prospects for the development of even more efficient devices. », a conclu Thiago Alegre.
Synthetic
This study offers new possibilities for the construction of quantum networks. In addition to this immediate application, it lays the foundations for future fundamental research. “We expect to be able to individually manipulate mechanical modes and mitigate optical nonlinearities in optomechanical devices“, said Alegre.
For a better understanding
What is dissipative optomechanics?
Dissipative optomechanics is a form of interaction where photons can be directly scattered from the waveguide to the resonator, allowing tighter control of the optoacoustic interaction.
What are nanomechanical resonators?
Nanomechanical resonators are nanoscale devices that promote the interaction between high-frequency mechanical vibrations and infrared light at wavelengths used by the telecommunications industry.
How important is this study?
This study is important because it demonstrates the first dissipative optomechanical system operating in a regime where the mechanical frequency exceeds the optical line width, opening new possibilities for the development of even more efficient devices and the construction of quantum networks.
What are the potential applications of this research?
Potential applications of this research include the development of advanced quantum networks used in computing and communications, as well as individual manipulation of mechanical modes and mitigation of optical nonlinearities in optomechanical devices.
Who conducted this research?
This research was carried out by researchers from the State University of Campinas (UNICAMP) in Brazil, in collaboration with colleagues from ETH Zurich in Switzerland and TU Delft in the Netherlands.
References
Article published in the journal Nature Communications by researchers from the State University of Campinas (UNICAMP) in Brazil, ETH Zurich in Switzerland and TU Delft in the Netherlands. Article: “Dissipative optomechanics in high-frequency nanomechanical resonators” – DOI: 10.1038/s41467-023-41127-7
Other co-authors are André Garcia Primo, Pedro Vinícius Pinho and Gustavo Silva Wiederhecker, all also affiliated with UNICAMP, Rodrigo da Silva Benevides at ETH Zürich and Simon Gröblacher at TU Delft. The study was funded by FAPESP within the framework of seven projects (19/09738-9, 20/15786-3, 19/01402-1, 18/15577-5, 18/15580-6, 18/25339- 4 and 22/07719-0).
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