  We investigate the domain of correlated non-Markovian channels, exploring the
potential memory arising from the correlated action of channels and the
inherent memory due to non-Markovian dynamics. The impact of channel
correlations is studied using different non-Markovianity indicators and
measures. In addition, the dynamical aspects of correlated non-Markovian
channels, including entanglement dynamics as well as changes in the volume of
accessible states, are explored. The analysis is presented for both unital and
non-unital correlated channels. A new correlated channel constructed with
modified Ornstein-Uhlenbeck noise is also presented and explored. Further, the
geometrical effects of the non-Markovianity of the correlated non-Markovian
channels are discussed with a study of change in the volume of the accessible
states. The link between the correlation factor and error correction success
probability is highlighted.
