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Teleportation of quantum logic

31.05.2019

Quantum teleportation transfers data from one quantum system to another, even if they are both completely isolated from each other. Physicists from the USA transferred the full quantum logic with the help of ions - the main elements of future quantum computers.

In order for a full-scale quantum computer to work, it would take millions of quantum bits, or qubits, and the ability to perform operations between qubits distributed between machines and networks. Teleportation of logical operations is one such method, which, moreover, does not require direct quantum mechanical connections.

A team of scientists from the US National Institute of Standards and Technology teleported a logic gate between two beryllium ion qubits located over 340 micrometers apart in separate zones of the ion trap. Such a distance excludes significant direct interaction. The operation switches the second qubit from state 0 to 1 or vice versa only if the first qubit is 1. If it is 0, nothing happens. Thus, both qubits can be in superposition when their values are both 1 and 0 at the same time.

At the heart of this teleportation process was the entanglement that binds the quantum properties of the particles. Magnesium ions were used as messengers between beryllium ions. The scientists found that the process entangles the magnesium ions with a 95% success rate. The success rate of the entire operation is noticeably lower.

A miniature quantum router was developed by Danish scientists. It guides light particles carrying quantum information inside a photonic microchip and combines nanooptomechanics and quantum photonics.

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Sunburn without UV 25.06.2017

A tan appears because ultraviolet stimulates the synthesis of melanin, a dark-colored pigment that must absorb ultraviolet radiation, preventing it from penetrating deeper and harming the deeper layers of the skin. But the skin will still receive some harm: the DNA in the cells will be damaged, and it remains only to hope for molecular repair enzymes that will correct these damages and prevent cell death or, even worse, the transformation of cells into cancerous ones.

However, life is simply not sweet for many without a tan, and they still go out into the sun again and again or go to the solarium. Is it possible to get tanned skin without being exposed to dangerous ultraviolet radiation? Researchers at the Massachusetts General Hospital and the Dana and Farber Cancer Institute say it is possible.

A few years ago, experts experimented with mice that were unable to synthesize melanin - such animals had a mutation in the genome that turned off pigment synthesis. But at the same time, it was found that a substance called forskolin could trigger the synthesis of melanin, bypassing the mutation, so that there was enough melanin to protect mice from the unpleasant effects of ultraviolet radiation.

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Before any drugs with "tanning molecules" appear on the market, you need to make sure that they will not have any oncological and generally any harmful effects.

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