title: Geometric entangling gates in decoherence-free subspaces with minimal requirements.
abstract: 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.
authors.affiliation: Department of Physics and Centre for Quantum Technologies, National University of Singapore, 2 Science Drive 3, Singapore 117542.
authors.forename: Xun-Li
authors.initials: XL
authors.lastname: Feng
authors.forename: Chunfeng
authors.initials: C
authors.lastname: Wu
authors.forename: Hui
authors.initials: H
authors.lastname: Sun
authors.forename: C H
authors.initials: CH
authors.lastname: Oh