  Quantum mechanics dictates the band-structure of materials that is essential
for functional electronic components. With increased miniaturization of
devices, it becomes possible to exploit the full potential of quantum mechanics
through the principles of superposition and entanglement. We propose a new
class of quantum rectifiers that can leverage entanglement to dramatically
increase performance by coupling two small spin chains through an effective
double-slit interface. Simulations show that rectification is enhanced by
several orders of magnitude even in small systems, and that the effect survives
in a noisy environment. Realizable using several of the quantum technology
platforms currently available, our findings reveal the importance of quantum
entanglement in seemingly contradictory applications such as heat and noise
control.
