August 2020
Beginner to intermediate
332 pages
8h 16m
Japanese
book
動かして学ぶ量子コンピュータプログラミング ―シミュレータとサンプルコードで理解する基本アルゴリズム
by Eric R. Johnston, Nic Harrigan, Mercedes Gimeno-Segovia, 北野 章, 丸山 耕司
Content preview from 動かして学ぶ量子コンピュータプログラミング ―シミュレータとサンプルコードで理解する基本アルゴリズム
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162
8
章 量子位相推定
8.7
QPU
の内部
位相推定の内部の仕組みを覗いてみることは有意義です。
7
章で導入された
QFT
プリミティブに加
えて、位相推定も多くの
QPU
アプリケーションで中心的な役割を演じます。
例8-1で用いた
phase_est()
関数を実装するコードを例8-2に示します。
サンプルコード
https://oreilly-qc.github.io?p=8-2
で例8-2を実行してみましょう。
例8-2
function phase_est(q_in, q_out, cont_u)
{
// Main phase estimation single run
// HAD the output register
HAD
q_out.had();
// Apply conditional powers of u
u
for (var j = 0; j < q_out.numBits; j++) {
cont_u(q_out, q_in, 1 << j);
}
// Inverse QFT on output register
invQFT
q_out.invQFT();
}
このコードは、図 8-6に示す回路を実装するものです。
固有状態
（
n
キ ュ ビ ット ）
固有位相
図8-6
かなりすっきりしていますね。では次に、この回路が
cont_u
パラメータを ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.