New quantum liquid crystals may play role in future of computers

The first 3-D quantum liquid crystals may have applications in quantum computing, report scientists. Liquid crystals fall somewhere in between a liquid and a solid: they are made up of molecules that flow around freely as if they were a liquid but are all oriented in the same direction, as in a solid. Liquid crystals can be found in nature, such as in biological cell membranes. Alternatively, they can be made artificially — such as those found in the liquid crystal displays commonly used in watches, smartphones, televisions, and other items that have display screens.

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A Map of Human History, Hidden in DNA

The computational biologist John Novembre uses our genetic code to rewrite the history of humanity. …

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Researchers capture excess photon energy to produce solar fuels

Scientists have developed a proof-of-principle photoelectrochemical cell capable of capturing excess photon energy normally lost to generating heat.

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The perfect pattern to trap light

Superimposing two lattices of similar periods creates structures that researchers can design to control and localize light.

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A Cosmic Burst Repeats, Deepening a Mystery

After a surprise discovery, astrophysicists are racing to understand superenergetic flashes of radio waves that sometimes beep out from distant galaxies. …

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On the role of entanglement in two-photon metrology

The role of entanglement in metrology with photon pairs is investigated. We consider the situations where either one photon only interacts with a probe, or where both photons interact with two independent systems. Based on arguments from quantum information theory, we show that the presence of entanglement in the state cannot lead to results, which could not be obtained with separable states. This shows that entanglement can only provide advantages when genuine two-photon interactions are present. …

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Super sensitive devices work on recycling atoms

Next-generation sensors to be used in fields as diverse as mineral exploration and climate change will be turbo boosted thanks to new research. Theoretical physicists said future precision sensing technology would exploit unusual effects of quantum mechanics.

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Unveiling nonlocal correlations in natural systems

Nonlocal correlations are a quantum phenomenon that constitute a stronger form of correlations than quantum entanglement, new research shows. Now researchers have developed a new method to show that the low energy states of some physical spin Hamiltonians can exhibit these nonlocal correlations.

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