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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12.3
整数
15
の素因数分解を
1
ステップずつ行う
239
既に説明したように、メインの
Shor()
関数では
2
つの小さな関数
ShorQPU()
と
ShorLogic()
を実
行します。
1
番目の関数
ShorQPU()
は反復周期を決定し、次に
CPU
上の従来型の
2
進数論理演算を使
用して素因数を決定する
2
番目の関数
ShoreLogic()
に結果を渡します。
Shor()
で実行されるステッ
プを大まかに分けると次の通りです。
ステップ 1 〜 4
a
x
mod(N)
の評価値の重ね合わせを作成する。
ステップ 5 〜 6
この信号の周期
p
を特定するために、前に説明した
QFT
トリックを実装する。
ステップ 7 〜 8
従来の
CPU
アルゴリズムで
p
を使用し、素因数を見つける。
8
キュビットレジスタの場合の手順を次に説明します。この
8
個のキュビットのうち
4
個は
a
x
mod(N)
に渡す
x
の値（の重ね合わせ）を表すために利用され、他の
4
つのキュビットはこの関数が返す値を処
理し、追跡します。
結局のところ、合計で
2
8
＝
256
個の値を追跡する必要があります。従って円表示では、
256
個の円を
使います。これらすべての円を
16
×
16
個の四角形に配置することで、
4
キュビットレジスタの
1
つ
1
つ
から
16
の状態を個別に可視化することができます（円表示の見方については
3
章を参照してください）。
便宜上、
16
×
16
個の円のタグをこれらのグリッドに追加し、
2
つのレジスタのそれぞれの値の確率を
示します。では実際に、
QPU
でいくつかの数の素因数分解をし ...
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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.