When people struggle to learn complex ideas like quantum search, how often is that—perhaps even invisibly—because they're not fully fluent in the prerequisite concepts? They might "know" the prereqs, but only with so much cognitive load / delay that they can't absorb more.
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This second essay begins to play out that notion. Our first essay (https://quantum.country/qcvc ) introduced QC's basics. Many readers reviewed that essay's concepts 5+ times over the last few weeks; with that growing fluency, we hope they'll find quantum search more accessible.
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This is kind of a silly connection, but I thought it was cool--geometrically, the Grover iterations do the same thing as these collisions between boxes and a wall: https://www.youtube.com/watch?v=jsYwFizhncE … (hitting the wall = reflecting across |s>, collision between boxes = reflecting across |E>)
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Thank you guys so much for your work on this material. I am really loving it! The quizzes and reminders to review are working great for me! I would be thrilled to see high quality material presented using this approach across a wide range of topics.




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Thank you! Delighted you're enjoying it.
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So I need to decide quickly whether or not the information is worth retaining before the spaced repetition begins...
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@threadreaderapp please unroll -
Hi! you can read it here: Thread by
@andy_matuschak: "New "mnemonic essay" on quantum computation with@michael_nielsen How can any procedure possibly search a list in O(√N) […]" https://threadreaderapp.com/thread/1118572243238305792.html … See you soon.
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Guessing, first sieve data into a sorted array of values!pic.twitter.com/irfwUmV0ET
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Is quantum debugging possible?
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New "mnemonic essay" on quantum computation with
How can any procedure possibly search a list in O(√N) time? Find out here—and remember what you've learned almost effortlessly through our integrated spaced repetition system.