Last Updated
：2025/12/05
bra-ket
Noun
Japanese Meaning
量子力学において、ハイルベルト空間内の状態を表すために使用される記法で、左側のベクトル（bra）と右側のベクトル（ket）の組み合わせ（またはbraとketの間に演算子を配置する場合もある）を指す。
（ plural ）
Quizzes for review
(physics) The product of two vectors (and optionally an operator), in Hilbert space, where the left vector is a bra and the right is a ket. Symbolised by ⟨...|...〉 (bra and ket only) or ⟨...|...|...〉 (bra, operator, ket).
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bra-ket
In advanced quantum mechanics, the bra-ket denotes the inner product between a bra and a ket and is commonly written as ⟨φ|ψ⟩.
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In advanced quantum mechanics, the bra-ket denotes the inner product between a bra and a ket and is commonly written as ⟨φ|ψ⟩.
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