bra-ket

短语

词形变化

bra-kets 复数 bra-kets

释义与例句

n.
  1. 1.

    The scalar product of two vectors (and optionally an operator), in Hilbert space, where the left (row) vector is a bra and the right (column) vector is a ket. Symbolised by ⟨...|...⟩ (bra and ket only) or ⟨...|...|...⟩ (bra, operator, ket).

    物理

词源

Concatenation of the terms bra and ket, which were introduced in 1939 and in turn derive from the splitting of the English word bracket.

来源：wiktionary