  Quantum technologies are increasingly recognized as groundbreaking
advancements set to redefine the landscape of computing, communications, and
sensing by leveraging quantum phenomena, like entanglement and teleportation.
Quantum technologies offer an interesting set of advantages such as
unconditional security, large communications capacity, unparalleled
computational speed, and ultra-precise sensing capabilities. However, their
global deployment faces challenges related to communication ranges and
geographical boundaries. Non-terrestrial networks (NTNs) have emerged as a
potential remedy for these challenges through providing free-space quantum
links to circumvent the exponential losses inherent in fiber optics. This paper
delves into the dynamic interplay between quantum technologies and NTNs to
unveil their synergistic potential. Specifically, we investigate their
integration challenges and the potential solutions to foster a symbiotic
convergence of quantum and NTN functionalities while identifying avenues for
enhanced interoperability. This paper not only offers useful insights into the
mutual advantages but also presents future research directions, aiming to
inspire additional studies and advance this interdisciplinary collaboration.
