Few-body perspective on fermionic pairing in one spatial dimension

Abstract In this perspective we discuss recent theoretical and experimental concepts giving a route to better understanding of conventional unconventional pairing mechanisms between opposite-spin fermions arising in one-dimensional mesoscopic systems. With special attention, focus on the problem detectability correlations particles. We argue that state-of-the-art experiments with few ultracold may finally break an impasse give pioneering unquestionable verification existence correlated pairs non-zero center-of-mass momentum.