Science, Space and Technology News 2024
Researchers from the Stiller Research Group have significantly cooled sound waves in an optical fiber to a near quantum ground state, reducing thermal noise and potentially bridging classical and quantum mechanics. This breakthrough, achieved through laser cooling and stimulated Brillouin scattering, marks a promising step towards utilizing long acoustic phonons in quantum technologies. Artist’s impression of cooled acoustic waves in an optical fiber taper.
Over the past decade, major technological advances have been made, making it possible to put a wide variety of systems into this state. Mechanical vibrations oscillating between two mirrors in a resonator can be cooled to very low temperatures as far as the quantum ground state. This has not yet been possible for optical fibers in which high-frequency sound waves can propagate. Now researchers from the Stiller Research Group have taken a step closer to this goal.
However, in this experiment, the length of the optical fiber was 50 cm, and a sound wave extending over the full 50 cm of the core of the fiber was cooled to extremely low temperatures. “These results are a very exciting step towards the quantum ground state in waveguides and the manipulation of such long acoustic phonons opens up possibilities for broadband applications in quantum technology,” according to Dr. Birgit Stiller, head of the quantum optoacoustics group.
Stiller: “This opens the door to a new landscape of experiments that allow us to gain deeper insights into the fundamental nature of matter.” The advantage of using a waveguide system is that light and sound are not bound between two mirrors, but propagating along the waveguide. The acoustic waves exist as a continuum – not only for certain frequencies – and can have a broad bandwidth, making them promising for applications such as high-speed communication systems.
France Dernières Nouvelles, France Actualités
Similar News:Vous pouvez également lire des articles d'actualité similaires à celui-ci que nous avons collectés auprès d'autres sources d'information.
A 'quantum leap' at room temperatureScientists have achieved a milestone by controlling quantum phenomena at room temperature.
Lire la suite »
Diamond quantum memory with Germanium vacancy exceeds coherence time of 20 msThe color centers of diamond are the focus of an increasing number of research studies, due to their potential for developing quantum technologies. Some works have particularly explored the use of negatively-charged group-IV diamond defects, which exhibit an efficient spin-photon interface, as the nodes of quantum networks.
Lire la suite »
A new device let a man sense temperature with his prosthetic handA device that can be integrated into prosthetic hands capitalizes on phantom sensations to enable users to sense hot and cold.
Lire la suite »
Chicago ties 138-year-old high-temperature record ahead of cooldownThe city of Chicago saw unseasonably warm conditions on Friday as temperatures reached 56 degrees, tieing a weather record set more than a century ago.
Lire la suite »
Researchers show classical computers can keep up with, and surpass, their quantum counterpartsA team of scientists has devised means for classical computing to mimic a quantum computing with far fewer resources than previously thought. The scientists' results show that classical computing can be reconfigured to perform faster and more accurate calculations than state-of-the-art quantum computers.
Lire la suite »
Combining materials may support unique superconductivity for quantum computingA new fusion of materials, each with special electrical properties, has all the components required for a unique type of superconductivity that could provide the basis for more robust quantum computing.
Lire la suite »