<story><title>New silicon structure opens the gate to quantum computers</title><url>https://www.princeton.edu/news/2017/12/11/new-silicon-structure-opens-gate-quantum-computers</url></story><parent_chain></parent_chain><comment><author>propter_hoc</author><text>I did graduate research in an area of experimental physics that was quite close to state of the art quantum computing research. It was very exciting, but all the research was pretty much in extreme conditions that aren&amp;#x27;t really usable for a realistic computing device (ultra-high vacuum, nanokelvin temperatures, high magnetic fields or laser trap confinement, etc.). From the looks of it this paper is in the same vein. Good progress, but the gate isn&amp;#x27;t quite &amp;quot;open&amp;quot; yet.</text></comment>
<story><title>New silicon structure opens the gate to quantum computers</title><url>https://www.princeton.edu/news/2017/12/11/new-silicon-structure-opens-gate-quantum-computers</url></story><parent_chain></parent_chain><comment><author>chunky1994</author><text>I haven&amp;#x27;t touched this stuff in a while so take this with a grain of salt.&lt;p&gt;This is good progress since it&amp;#x27;s about an order of magnitude faster for operations than previously constructed CNOT gates, however it still has many caveats for a semiconducter-like leap towards real quantum computers:&lt;p&gt;a) Low temperature bound for the level of fidelity they want&lt;p&gt;b) Doesn&amp;#x27;t allow us to engineer quantum chips of more qubits efficiently since the decoherence between quantum dots is still a major issue.&lt;p&gt;c) The science journalism title is a bit misleading. While this happens in a silicon structure there is nothing new about it, what&amp;#x27;s new is that they managed to use the driving resonance to control the dephasing during the gate operation.</text></comment>