qcond
Qcond is a term used in discussions of quantum information and quantum decision theory to denote a quantum conditioning operation or the conditioned quantum state of a system. In this usage, qcond(ρ, E) represents the post-conditioned state of a system described by the density operator ρ after conditioning on an event described by a positive operator E, with 0 ≤ E ≤ I.
In the standard projective-measurement case, a conditioning on a projector P leads to the conditioned state ρ
Properties of qcond include dependence on the conditioning event, nonlinearity with respect to the prior state,
In practice, qcond is often discussed alongside concepts like post-selection and conditioned quantum states. Related topics