Definition of "ket" in Englisch

noun

1. (linear algebra, quantum mechanics) A column vector, in Hilbert space, especially as representing the state of a quantum mechanical system; the complex conjugate transpose of a bra (a row vector); a ket vector. Symbolised by |...〉.

   • A particular ket, say #124;A#92;rangle, might be represented by a particular column vector. Its corresponding bra, #92;langleA#124;, would then be represented by the row vector which is the transpose conjugate of that column vector.

noun

1. (Northern England) Carrion; any filth.

2. (Northumbria) Sweetmeats.

3. (Wearside) A sweet, treat or candy.

noun

1. (colloquial) ketamine

noun

1. (Scotland) matted wool