In the quest for smaller,
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Researchers at Ohio State University have discovered a way to make quantum devices using technology common to the chip making industry today,
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This work might one day enable faster,
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Paul Berger,
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The team fabricated a device called a tunneling diode using the most common chip making technique,
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"We wanted to do this using only the tools found in the typical chip makers toolbox,
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The quantum device in question is a resonant interband tunneling diode (RITD) a device that enables large amounts of current to be regulated through a circuit,
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RITDs have been difficult to manufacture because they contain dopants chemical elements that don’t easily fit within a silicon crystal,
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Atoms of the RITD dopants antimony or phosphorus,
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"It’s like when you’re playing Tetris and you have a big block raining down,
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In the past,
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Berger discovered that RITD dopants could be added during chemical vapor deposition,
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"One key is hydrogen,
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Tunneling diodes are so named because they exploit a quantum mechanical effect known as tunneling,
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In theory,
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Researchers judge the usefulness of tunneling diodes by the abrupt change in the current densities they carry,
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The RITDs that Berger’s team fabricated had a ratio of 1,
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"We’re close,
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He envisions his RITDs being used for ultra low power computer chips operating with small voltages and producing less wasted heat,
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"Chip makers today are having a great difficulty boosting performance in each generation,
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"That’s why moving to quantum devices will be a game changer,
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RITDs could form high resolution detectors for imaging devices called focal plane arrays. These arrays operate at wavelengths beyond the human eye and can permit detection of concealed weapons and improvised explosive devices. They can also provide vision through rain,
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