Commuter

Japanese: commutator
Commuter

...This is nothing more than a mathematical expression of the fact that if you measure the number of particles after they are generated, you will find that it is one more than before. For operators A and B , AB - BA (usually expressed as [ A , B ]) is called the commutator, and the equation that defines the commutator is called the commutation relationship. When the commutator is 0, A and B are said to be commutative. ...

*Some terminology explanations that mention "commutator" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…これは,粒子を生成した後で粒子数を測定すれば,前より1だけ増えているということを数学的に表現したものにほかならない。 演算子A,Bに対してABBA(ふつう[A,B]で表す)を交換子commutatorと呼び,交換子を規定する関係式を交換関係という。交換子が0であるとき,ABは交換可能であるという。…

※「commutator」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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