  We study quantum evolution of the entanglement of a quantum dot connected to
left and right leads initially maintained at chemical potentials $\mu_{L}$ and
$\mu_{R}$ respectively, within the non-interacting resonant-level model. The
full nonequilirbium mixed state density matrix of the whole system is written
down exactly, and entanglement is computed by recourse to the notion of mutual
information. A strong and direct correlation is found between the Landauer
current, and the entanglement at all times, the steady-state values in
particular displaying a quadratic relationship at high temperatures.
Strikingly, it is found that one can obtain a maximally entangled quantum dot
by simply applying a sufficiently large `source-drain' voltage $V_{SD}$ even at
high temperatures.
