Science Focus
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In 2008, scientists at HP invented a fourth fundamental component to join the resistor, capacitor, and inductor: the memristor. Theorized back in 1971, memristors showed promise in computing as they can be used to both build logic gates, the building blocks of processors, and also act as long-term storage.
At its HP Discover conference in Las Vegas today, HP announced an ambitious plan to use memristors to build a system, called simply "The Machine," shipping as soon as the end of the decade. By 2016, the company plans to have memristor-based DIMMs, which will combine the high storage densities of hard disks with the high performance of traditional DRAM.
John Sontag, vice president of HP Systems Research, said that The Machine would use "electrons for processing, photons for communication, and ions for storage." The electrons are found in conventional silicon processors, and the ions are found in the memristors. The photons are because the company wants to use optical interconnects in the system, built using silicon photonics technology. With silicon photonics, photons are generated on, and travel through, "circuits" etched onto silicon chips, enabling conventional chip manufacturing to construct optical parts. This allows the parts of the system using photons to be tightly integrated with the parts using electrons.
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