An atomtronics transistor for quantum gates
  We present a mechanism for quantum gates where the qubits are encoded in the population distribution of two component ultracold atoms trapped in a species-selective triple-well potential. The gate operation is a specific application of a new design for an atomtronics transistor where inter-species interaction is used to control transport, and can be realized with either individual atoms or aggregates like Bose-Einstein condensates (BEC). We demonstrate the operational principle with a static external potential, and show feasible implementation with a smooth dynamical potential. 
Miroslav Gajdacz, Tom\'a\v{s} Opatrn\'y, and Kunal K. Das
cond-mat.quant-gas