Tag

Cold Atoms

All articles tagged with #cold atoms

"Revolutionizing Quantum Memory: A Highly Efficient, High-Dimensional Approach"
quantum-technology2 years ago

"Revolutionizing Quantum Memory: A Highly Efficient, High-Dimensional Approach"

Researchers have introduced a new approach to achieve highly efficient 25-dimensional quantum memories based on cold atoms, enabling the storage of high-dimensional information in a medium. By leveraging the mode-independent interaction between light and matter associated with a spatial pattern known as the perfect vortex optical field, the team's quantum system encodes high-dimensional information on signal photons, extending the storage dimension from two to 25. This advancement not only expands memory capacity and increases the transmittable capacity of quantum communication but also has potential implications for fault-tolerant quantum computing. The approach holds promise for creating various high-dimensional quantum memories and could facilitate the realization of other quantum technologies, such as high-dimensional quantum repeaters.

"Quantum and Neuronal Avalanches: Insights and Innovations"
physics3 years ago

"Quantum and Neuronal Avalanches: Insights and Innovations"

Researchers at Harvard University have observed the onset of quantum avalanches in a many-body localized system for the first time. Many-body localization occurs when a system made of interacting particles fails to reach thermal equilibrium even at high temperatures. The researchers placed cold atoms in a potential that they built out of precisely shaped laser beams and observed how the particles would spread. They found that particles from the non-disordered region started to spread to the disordered one at an increasing speed, suggesting the onset of a quantum avalanche. These findings could inspire new experiments aimed at further probing quantum avalanches and assessing the robustness of localization in strongly interacting many-body systems.