noun
superselection rule
A concept in quantum mechanics that restricts which superpositions of states are physically realizable, often related to conserved quantities or symmetries.
超選択則は、量子力学において特定の重ね合わせ状態が禁止されることを説明する。
The superselection rule explains why certain superposition states are forbidden in quantum mechanics.
Compound of 超 (super) + 選択 (selection) + 則 (rule), likely a calque of the English term 'superselection rule'.