- #1

- 1,225

- 75

## Main Question or Discussion Point

**Hi.**

1. Does a pure state

[tex]\hat{\rho}=\sum_k p_k|\psi_k><\psi_k|[/tex] where ##p_k=1## for k=i and otherwise 0 ?

2. Does quantum jump by observation work for both mixed and pure states ?

Your teachings will be appreciated.

1. Does a pure state

**belong to**mixed states[tex]\hat{\rho}=\sum_k p_k|\psi_k><\psi_k|[/tex] where ##p_k=1## for k=i and otherwise 0 ?

2. Does quantum jump by observation work for both mixed and pure states ?

Your teachings will be appreciated.