Emergent geometric phase in time-dependent noncommutative quantum system

Abstract: Any effort to localise an event in the vicinity of the Planck length scale, only where the quantum gravitational effects are predicted to be observed, will invariably result in gravitational collapse. One must postulate noncommutative (NC) algebra between space-time coordinates, which are now elevated to the status of operators, in order to prevent such a situation from occurring. On the other hand, a consistent formulation of Quantum mechanics itself, with time being an operator is a challenging and longstanding problem. Here we have given a systematic way to formulate non-relativistic quantum mechanics on 1+1 dimensional NC space-time (Moyal type noncommutativity) in a user-friendly way, which mandates the formulation of an equivalent commutative theory. Although the effect of noncommutativity of space-time should presumably become significant at a very high energy scale, it is intriguing to speculate that there should be some relics of the effects of quantum space-time even in a low-energy regime. With this motivation in mind, we undertake the study of a time-dependent system, namely a forced harmonic oscillator in NC space-time and have shown the emergence of a geometric phase, which vanishes if the NC parameter is put to zero, proving the fact that, the occurrence of geometric phase is totally dependent on the non-commutativity of space-time.