Archimedes screw4/1/2023 ![]() ![]() The Stanford experiment is the first example of the scar state in a many-body quantum gas and only the second ever real-world sighting of the phenomenon. The existence of scar states within a quantum system with many interacting particles – known as a quantum many-body system – has only recently been confirmed. ![]() Scar states are of particular interest because they may offer a protected refuge for information encoded in a quantum system. That was beyond my wildest conception.”Īlong the way, the researchers also observed the development of scar states – extremely rare trajectories of particles in an otherwise chaotic quantum system in which the particles repeatedly retrace their steps like tracks overlapping in the woods. “I did not expect that I would see a dramatic, complete stabilization of it. “My expectation for our system was that the stability of the gas would only shift a little,” said Lev, who is an associate professor of applied physics and of physics in the School of Humanities and Sciences at Stanford. Archimedes screw is still in use today for pumping liquids and granulated solids such as coal and grain. Their discovery is detailed in a paper published Jan. ![]() Now, researchers led by Stanford University physicist Benjamin Lev have developed a quantum version of Archimedes’ screw that, instead of water, hauls fragile collections of gas atoms to higher and higher energy states without collapsing. It was a machine consisting of a screw housed inside a hollow tube that trapped and drew water upon rotation. INTRODUCTION The optical lattice is a standing wave that can be realized by the interference of two counter-propagating beams, which form a periodic pattern of intensity (alternating low and high intensity regions) 1, 2. By adding some magnetic flair to an exotic quantum experiment, Benjamin Lev's group produced an ultra-stable 1D quantum gas with never-before-seen “scar” states, a feature that could someday be useful for securing quantum information.Īs the story goes, the Greek mathematician and tinkerer Archimedes came across an invention while traveling through ancient Egypt that would later bear his name. In this case, the rotating HOT operates as an Optical Archimedes’ Screw (OAS) for atoms. ![]()
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