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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74
4
章 量子テレポーテーション
図4-6
多重キュビットレジスタを扱う場合には、図
4-6
と同様に、円表示を行と列に配置します。
これによって、個々のキュビットの振る舞いをより迅速に確認することができます。
プログラムの開始時に、図4-6に示すように、
3
つのキュビットすべてが状態
∣
0
⟩
に初期化されます。
このとき、唯一のとりうる値は、
alice=0
、
ep=0
、
bob=0
です。
ステップ
1
：もつれたペアを作る
テレポーテーションでは、まず、もつれたリンク（
entangled link
）を 確 立 し ま す 。 こ れ を 実 現 す る
HAD
と
CNOT
の組み合わせは、
3
章で用いたプロセスと同一です。このプロセスは、ベルペア（
Bell
pair
）と 呼 ば れ る 、
2
つのキュビットからなるもつれ状態を生成するものです。
図4-7の円表示から容易にわかることは、もし
bob
と
ep
を読み出すと、それらの値は
50/50
でランダ
ムになりますが、互いに一致することが保証されているということです。これは、もつれに相当します。
図4-7
ステップ
2
：積荷キュビットを準備する
もつれによるリンクが確立されたら、アリスは送信する積荷キュビットを準備できます。アリスがそ
れをどのように準備するかは、アリスがボブに送りたい（量子）情報の性質に依存します。アリスは積
荷キュビットに値を書き込み、他の
QPU
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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.