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The new state of one-dimensional quantum gas



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As the story progresses, Greek mathematician and mathematician Archimedes encounters an invention as he travels through ancient Egypt, which will later bear his name. It was a machine made up of a screw inside a hollow tube that trapped and pulled water as it turned. Now, researchers led by Stanford University physicist Benjamin Lev have developed a quantum version of Archimedes̵

7; screw that, instead of water, draws brittle gas atoms. Thin to a higher and higher energy state without collapsing Their findings are detailed in a paper published Jan. 14. science.


“My expectation for our system is that the stability of the gas will change very little,” said Lev, who is an associate professor of applied physics and physics at the Stanford School of Humanities and Sciences. “I never expected that I was going to see such an amazing perfect stabilization that was beyond my craziest idea.”

Along the way, the researchers also observed the development of the scar state, a very rare particle trajectory in disorganized quantum systems, where the particles revert through repetitive steps, such as those that overlap in the forest. The scar state is of particular interest as it may offer a protected refuge for encrypted data in quantum systems. The existence of a scar state within a quantum system with a large number of interacting particles known as multiple quantum systems has only been confirmed recently. Stanford’s experiment is the first example of the scar state in multiple quantum gases, and is just a second real-world sightings.

Superb and stable

Lev specializes in experiments that expand our understanding of how multiple parts of a quantum system are located at the same temperature or thermal equilibrium. This is an exciting issue to investigate due to their resistance to the so-called “Cooling” is the key to creating stable quantum systems that can drive new technologies such as quantum computers.

In the experiment, the team explored what would happen if they tweaked an unusual multi-experimental system called super gas. Tonks-Girardeau These are highly excited single-dimensional quantum gases, atoms in the gaseous state confined to move in a single strand, tuned to allow their atoms to develop extremely strong gravitational forces towards each other. The coolest thing about them is that even under extreme loads But in theory they shouldn’t collapse into a ball-like mass. (As with normal attractive gases), however, in practice they collapse due to the imperfection of the experiment. Lev, a strong penchant for the dysprosium of the magnetic element, wonders what would happen if he and his students created a super gas. Tonks-Girardeau Containing dysprosium atoms and change their magnetic direction. ‘Just that.’ Maybe they resist collapse better than non-magnetic gases?

“The magnetic interactions that we can add are very weak compared to the attractive interactions that are already present in the gas, so our expectations haven’t changed much, we think it will continue to collapse. But it’s not quite ready, “said Lev, a member of the Stanford Ginzton Lab and Q-FARM.” Wow, are we wrong? “

Their dysprosium model ended up producing super gas. Tonks-Girardeau That remains stable no matter what The researchers flipped the atomic gas between attractive and obnoxious states, elevating or “screwing” the system to a higher and higher energy state. But the atoms are still not collapsing.

Build from the foundation

Although there was no immediate implementation of the findings. But Lev and their colleagues are developing the science necessary to power the quantum technology revolution that many have predicted is going to happen. For now, Lev said the physics of multiple quantum systems. The imbalance of the body system continues to be astounding.

“There isn’t a textbook on the shelf that you can pull off to tell you how to build your own quantum factory,” he said. It is necessary to know how to build a chemical plant as if we were working in the late 19th century right now.

These researchers are just beginning to examine the many questions they have about their Archimedes quantum screw, including how to mathematically describe the state of these scars and if the system. Do the cooling, which in the end it must be done. On top of that, they plan to measure the momentum of atoms in the scarred state to begin developing solid theories about why their system works the way it does.

The results of this experiment were so unexpected that Lev said he could not have predicted that the new knowledge would come from a deep investigation of the Quantum Archimedes screw. But he pointed out that perhaps the best experiment was.

“This is one of the few times in my life that I have been doing a really experimental experiment, not a demonstration of existing theory. I don’t know how to have an answer in advance,” Lev said. That’s completely new and unexpected, and that made me say, ‘Yeah, experimenter!’


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More information:
“Topological pumping of dipolar gas 1D to a highly correlated pre-thermal state” science (2021) .sciencemag.org/cgi/doi … 1126 / science.abb4928

Provided by Stanford University

Reference: New State of One-Dimensional Quantum Gases (2021, January 14) .Retrieved January 14, 2021 from https://phys.org/news/2021-01-state-one-dimensional-quantum-gas.html.

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