Ultimate Career Solutions.

Making Matter Invisible

0 13

A weird quantum effect that was predicted decades ago has finally been demonstrated. This says if you make a cloud of gas cold and dense enough, you can make it invisible. Blue laser light used by one of the experiments to detect the increased transparency of the gas.

Now scientists at the Massachusetts Institute of Technology (MIT) used lasers to squeeze and cool lithium gas to densities and temperatures low enough that it scattered less light. If they can cool the cloud even closer to absolute zero (minus 459.67 degrees Fahrenheit, or minus 273.15 degrees Celsius), they say it will become completely invisible. The bizarre effect is the first ever specific example of a quantum mechanical process called Pauli blocking.

The new technique could be used to develop light-suppressing materials to prevent information loss in quantum computers. This would be especially useful for improving the efficiency of quantum computers, which are currently hindered by quantum decoherence — the loss of quantum information (carried by light) to a computer’s surroundings.

Pauli blocking comes from the Pauli exclusion principle, first formulated by the famed Austrian physicist Wolfgang Pauli in 1925. Pauli posited that all so-called fermion particles like protons, neutrons and electrons with the same quantum state as each other cannot exist in the same space.

getting an atomic cloud to this state is very difficult. It not only needs incredibly low temperatures but also requires the atoms to be squeezed to record densities. It was a delicate task, so after nabbing their gas inside an atomic trap, the researchers blasted it with a laser.

 Two other independent teams have also cooled down two other gases, namely potassium and strontium, to show the effect too. In the strontium experiment, the researchers Pauli blocked excited atoms to keep them in an excited state for longer.

Read also: https://careercore.in/uncharted-seamount-grounded-submarine.html

%d bloggers like this: