  Quantum heat engines form an active field of research due to their potential
applications. There are several phenomena that are unique to the quantum
regime, some of which are known to give these engines an edge over their
classical counterparts. In this work, we focus on the study of one and
two-qubit finite-time Otto engines interacting with squeezed thermal baths, and
discuss their important distinctions as well as the advantage of using the
two-qubit engine. In particular, the two-qubit engine offers an interesting
study of the interplay between the degree of squeezing and that of the
coherence between the two qubits. We find that the two-qubit engine generally
yields higher power than its one-qubit counterpart. The effective temperature
of the squeezed baths can be calculated both for the one and two-qubit engines,
and they tend to show an exponential growth with increase in squeezing
parameters $r_h$ and $r_c$. It is also observed that by tuning the squeezing
parameters, the machine can be made to work either in the engine or in the
refrigerator mode. Additional effects due to the change in the inter-qubit
separation have been studied.
