ScienceDaily: Top Technology News

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Multi-purpose photonic chip paves the way to programmable quantum processors Posted: 11 Dec 2011 10:40 AM PST A multi-purpose optical chip which generates, manipulates and measures entanglement and mixture -- two quantum phenomena which are essential driving forces for tomorrow's quantum computers -- has now been developed. This work represents an important step forward in the race to develop a quantum computer.

World's smallest steam engine: Heat engine measuring only a few micrometers works as well as its larger counterpart, although it sputters Posted: 11 Dec 2011 10:40 AM PST What would be a case for the repair shop for a car engine is completely normal for a micro engine. If it sputters, this is caused by the thermal motions of the smallest particles, which interfere with its running. Researchers have now observed this with a heat engine on the micrometer scale. They have also determined that the machine does actually perform work, all things considered. Although this cannot be used as yet, the experiment shows that an engine does basically work, even if it is on the microscale. This means that there is nothing, in principle, to prevent the construction of highly efficient, small heat engines.

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