Loop quantum effects on Om diagnostic and their cosmological implications

In this paper we study the loop quantum effects on the Om diagnostic and subsequently on the universe. We reconstruct the Om diagnostic in the background of loop quantum gravity and then study the behaviour of various Chaplygin gas dark energy models, using the modified diagnostic in a comparative scenario. The trajectories discriminate the various dark energy models from each other both in Einstein gravity as well as loop quantum gravity. The loop quantum effects are also clearly noticeable from the trajectories in the past, present, and future universe. We see that the loop quantum deviations are highly pronounced in the early universe but alleviates as we tend towards the present universe and continue to decay in the future. This raises a big question on the effectiveness and consequently the suitability of loop quantum cosmology to explain the future universe. (author)