Engineers' new topological insulator reroutes photonic 'traffic' on the fly

Photonic chips promise even faster data transfer speeds and information-dense applications, but the components necessary for building them remain considerably larger than their electronic counterparts, due to the lack of efficient data-routing architecture. A photonic topological insulator with edges that can be dynamically redefined, however, would help solve this problem. Being able to route these 'roads' around one another as needed means the entire interior bulk could be used to efficiently build data links.

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How breast cancer uses exosomes to metastasize to the brain

In breast cancer, metastases to the brain often spell a death sentence; many women survive for less than a year after diagnosis. A new study reveals how the cancer is able to cross the blood-brain-barrier: by sending out exosomes that hijack the natural cell process of transcytosis, tricking the cells in the BBB into taking them up. The researchers now hope to identify therapeutic targets that could stop brain metastases from happening.

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Novel atomic clock design offers 'tweezer' control

Physicists have demonstrated a novel atomic clock design that combines near-continuous operation with strong signals and high stability, features not previously found together in a single type of next-generation atomic clock. The new clock, which uses laser 'tweezers' to trap, control and isolate the atoms, also offers unique possibilities for enhancing clock performance using the tricks of quantum physics.

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