Scientists have re-investigated a sixty-year-old idea by the American physicist P.W. Anderson and provided new insights into the quantum world.
Quantum physics explains how the world’s building blocks such as atoms or electrons are put together. Everything we see around us is made up of atoms and electrons which are so small one billion atoms placed side by side could fit within a centimeter.
Because of the way atoms and electrons behave, scientists describe this behavior as waves. In the research, scientists looked at how waves can go through a landscape containing obstacles placed in random positions.
Anderson initially developed this idea to describe electrons in semiconductors. His insight greatly contributed to the development of computer chips and electronics.
“His work describes a common phenomenon that happens for all kinds of waves, be it light waves, ocean waves, sound waves or quantum-mechanical waves,” says lead researcher Maarten Hoogerland from the University of Auckland.
Waves, unlike particles that travel in straight lines, can go around obstacles, but if there are enough random obstacles, the waves cannot get through because they interfere with each other and cancel themselves out.
In the Quantum Information Lab at the University, researchers took Anderson’s work one step further and added an ultra-cold atom experiment to the mix. With the aid of high tech lasers, they manipulated these ultra-cold atoms until they were so cold, their wave behavior became visible to the eye.
“We are talking a billionth of a degree above absolute zero (-273.15 degrees C) so that is pretty chilly. We have created customized patterns of obstacles to stop the waves, and when we take a picture, we can find out where these atoms are,” Dr Hoogerland says.
“This way, we can see what exactly is required to get our quantum-mechanical waves to reflect off obstacles, and why the waves do not get in.”
Working together, through the Dodd-Walls Centre for Photonics and Quantum Technologies, with researchers at the University of Otago, the research team was able to match the results of the experiments with theoretical predictions, giving way to new insights which could be used to create and test “designer materials” with customized properties.
Reference: “Observation of two-dimensional Anderson localisation of ultracold atoms” by Donald H. White, Thomas A. Haase, Dylan J. Brown, Maarten D. Hoogerland, Mojdeh S. Najafabadi, John L. Helm, Christopher Gies, Daniel Schumayer and David A. W. Hutchinson, 2 October 2020, Nature Communications.
Very interesting topic
Stop trying to create black holes, before it’s too late and one is made..
… This needs some attention, it might a proper move, though …
What was the puzzle that the scientists cracked?
What was the 60-year-old idea of Anderson?
I read the article twice just to make sure I hadn’t missed something important. I hadn’t. Entirely uninformative. I am writing this in the spirit of positive criticism, please do not get offended.
Found the article to not mention the headline subject-matter. Quantum Locking? The 60 year question should be how to keep the atoms at absolute or right under absolute zero. This with high voltage and magnetic elements just might “Rip” a hole in our static atmosphere. Just a Theory.
Freeze frame clocking insitu entangled geometrical mechanistics perception intrinsics of pattern relationships quantifiable by artificial reflection. I think.
I agree with Michael. The headline suggested something was cracked, but never mentions what it is. Very odd.
… You got stuck into two local maximums and you are spinning in there, one is a theory of relativity and another one is quantum theory, and then you try to mend those two things together … with what M-theories…
… This, I was trying and trying to get it, should I go and read a research in fool mode!…
… Some backtrack might come in handy for now…
They simply added a super cooled atom which makes it so quantum waves can be viewed,that way they can observe it’s wave interaction with surrounding waves that cancel each other out and try to find a way to manipulate them better. By using quantum mathematics instead of string.
… if you use a calculus, it will not stop at the Plank’s…