A two-atom quantum duet

Researchers in the middle for Quantum Nanoscience (QNS) inside the Institute for Basic Science (IBS) achieved a significant breakthrough in protecting the quantum properties of electrons on a surface. The scientists also used the magnetism of single molecules, called spin, as a fundamental building block for quantum information processing. The researchers could demonstrate that by packaging two molecules tightly together they could safeguard their delicate quantum properties far better than for only 1 atom.

The twist is a basic quantum mechanical thing and modulates magnetic properties of substances. In a classical picture, the twist frequently is considered as the needle of a compass. South or north pole of the needle, as an instance, can signify spin down or up. But, according to the laws of quantum mechanics, the twist may also tip in both directions at precisely the exact same moment. This superposition condition is extremely delicate since the interaction of the spin with all the neighborhood surroundings triggers dephasing of their superposition. Knowing the dephasing mechanism and improving the quantum coherence are among the critical components toward spin-based quantum data processing.

In this study, published in the journal Science Advances in November 9, 2018, QNS scientists attempted to curb the decoherence of electrons by building them closely together. The twists, for that they utilized solitary titanium atoms, were first analyzed using a sharp metallic tip of a scanning tunneling microscope and the atoms’ spin conditions were discovered using electron spin resonance. The researchers discovered that by attracting the atoms really close together (1 million times nearer than a millimeter)they could shield the superposition conditions of both of these magnetically-coupled atoms 20 times more in comparison to a single atom. “Just like a phalanx, the 2 atoms could shield each other from outside influences, better than independently.” Stated Dr. Yujeong Bae, researcher in QNS and first author of this study. “This manner the entangled quantum states created weren’t influenced by ecological disruptions like magnetic field sound.”

“That is a substantial advancement that reveals how we could engineer and feel that the conditions of atoms. This lets us research their potential to be utilized as quantum bits for future quantum data processing.,” added Prof. Andreas Heinrich, director of QNS. In future experiments, the investigators aim to build more complex structures so as to research and enhance the quantum properties of electrons and nanostructures.

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Materials supplied by Institute for Basic Science. Notice: Content may be edited for length and style.

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A two-atom quantum duet

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