Particles can be measured jointly without bringing them together—an advance for quantum communication and computing

Origin of quantum-mechanical complementarity probed by a ‘which-way’ experiment in an atom interferometer

The principle of complementarity refers to the ability of quantum-mechanical entities to behave as particles or waves under different experimental conditions. For example, in the famous double-slit experiment, a single electron can apparently pass through both apertures simultaneously, forming an interference pattern. But if a ‘which-way’ detector is employed to determine the particle's path, the interference pattern is destroyed. This is usuall…

Particles can be measured jointly without bringing them together—an advance for quantum communication and computing

By breaking away from the laws of classical physics, quantum physics has opened the door to describing the behavior of atoms and particles. This science, which explores the most fundamental building blocks of nature, relies in particular on the ability to measure their individual and collective properties.

New toolbox helps tackle dynamics in long-range interacting particles

New toolbox helps tackle dynamics in long-range interacting particles Latest research from the Turkheshi Group based at THP Cologne tackles a key challenge in quantum science: understanding how groups of particles behave when they’re being monitored and interact with each other over long distances. These systems are important for next-generation quantum technologies, but their behavior has been hard to predict. The research team developed a powe…

Particles can be measured jointly without bringing them together

A UNIGE team has shown that particles can be measured jointly without bringing them together - a key advance for quantum communication.