  We propose a scheme for deterministic generation and long-term stabilization
of entanglement between two electronic spin qubits confined in spatially
separated quantum dots. Our approach relies on an electronic quantum bus,
consisting either of quantum Hall edge channels or surface acoustic waves, that
can mediate long-range coupling between localized spins over distances of tens
of micrometers. Since the entanglement is actively stabilized by dissipative
dynamics, our scheme is inherently robust against noise and imperfections.
