Geometric Entangling Gates in Decoherence-Free Subspaces with Minimal Requirements
Xun‐Li Feng, Chunfeng Wu, Hui Sun, C. H. Oh · Physical Review Letters · 2009
We introduce a new strongly driven dispersive atom-cavity interaction and develop a new scheme for implementing the nontrivial entangling gates for two logical qubits in decoherence-free subspaces (DFSs). Our scheme combines the robust advantages of DFS and the geometric phase. Moreover, only two neighboring physical qubits, which encode a logical qubit, are required to undergo the collective dephasing in our scheme.