  This paper initiates the study of energy-efficiency gains provided by
caching. We focus on the cache-aided Gaussian interference channel in the
low-SNR regime. We propose a strategy that creates content overlaps at the
transmitter caches to allow for co-operation between the transmitters. This
co-operation yields a beamforming gain, which has to be traded off against a
multicasting gain. We evaluate the performance of this strategy and show its
approximate optimality in both the single-receiver case and the
single-transmitter case.
