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We found 2 dictionaries that define the word bra-ket:

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  1. bra-ket: Wiktionary
  2. Bra-ket: Wikipedia, the Free Encyclopedia

Definitions from Wiktionary (bra-ket)

noun:  (physics) 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).

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