  We present a solid state thermal machine based on quantum dots to generate
steady-state entanglement between distant spins. Unlike previous approaches our
system is controlled by experimentally feasible steady state currents
manipulated by dc voltages. By analyzing the Liouvillian eigenspectrum as a
function of the control parameters, we show that our device operates over a
large voltage region. As an extension, the proposed device also works as an
entanglement thermal machine under a temperature gradient that can even give
rise to entanglement at zero voltage bias. Finally, we highlight a
post-selection scheme based on currently feasible non-demolition measurement
techniques that can generate perfect Bell-pairs from the steady state output of
our thermal machine.
