  The field of information scrambling has seen significant growth over the last
decade, where the out-of-time-ordered correlator (OTOC) has emerged as a
prominent tool to probe it. In this work, we use bipartite OTOC, a particular
form of OTOC, to study information scrambling in the atom-field interaction
models and the model of the Ising spin chain interacting with a tilted magnetic
field. This is done considering the effects of open quantum systems. A
relationship between information scrambling, using bipartite OTOC, and
irreversibility, using entropy production, is probed under unitary dynamics.
The equivalence of bipartite OTOC with operator entanglement is explicitly
shown for the Ising model.
