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Topological insulators are a broad class of unconventional materials that areinsulating in the interior but conduct along the edges. This edge transport istopologically protected and dissipationless. Until recently, all existingtopological insulators, known as quantum Hall states, violated time-reversalsymmetry. However, the discovery of the quantum spin Hall effect demonstratedthe existence of novel topological states not rooted in time-reversalviolations. Here, we lay out an experiment to realize time-reversal topologicalinsulators in ultra-cold atomic gases subjected to synthetic gauge fields inthe near-field of an atom-chip. In particular, we introduce a feasible schemeto engineer sharp boundaries where the "edge states" are localized. Besides,this multi-band system has a large parameter space exhibiting a variety ofquantum phase transitions between topological and normal insulating phases. Dueto their unprecedented controllability, cold-atom systems are ideally suited torealize topological states of matter and drive the development of topologicalquantum computing.

Engineering Time-Reversal Invariant Topological Insulators With Ultra-Cold Atoms