Resilience of the Mixed-State Wigner Function

Solution of the quantum Vlasov equation shows the phase space dynamics of a mixed-state Wigner function is more resilient against changes in external electric and magnetic fields than a pure-state Wigner function. A particle in a mixed-state is harder to follow and localize, but the freedom to access a range of pure states increases its inertia against changes in external conditions. This could explain the electron's stability in the Shrödinger's atomic orbital model and perhaps provides a way to preserve the information of a qubit sufficiently long for quantum computing.