Tiny optical cavity could make quantum networks possible

Engineers at Caltech have shown that atoms in optical cavities—tiny boxes for light—could be foundational to the creation of a quantum internet. Their work was published on March 30 by the journal Nature.

Optimizing efficiency of quantum circuits

Quantum circuits, the building blocks of quantum computers, use quantum mechanical effects to perform tasks. They are much faster and more accurate than the classical circuits that are found in electronic devices today. In ...

Time symmetry and the laws of physics

If three or more objects move around each other, history cannot be reversed. That is the conclusion of an international team of researchers based on computer simulations of three black holes orbiting each other. The researchers, ...

Dark matter and massive galaxies

About 85% of the matter in the universe is in the form of dark matter, whose nature remains a mystery, and the rest is of the kind found in atoms. Dark matter exhibits gravity but otherwise does not interact with normal matter, ...

Environmental policy often has undesirable side effects

"Good intentions" do not generally produce "good results." This wisdom also applies to establishing coherent environmental policies. Without proper oversight and planning, environmental policies can lead to unintended and ...

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