title: Quantum state engineering with nitrogen-vacancy centers coupled to low-Q microresonator.
abstract: We demonstrate efficient schemes of deterministic entanglement generation and quantum state transfer (QST) with the nitrogen-vacancy (NV) centers in diamond confined in separated microtoroidal resonators via single-photon input-output process. Assisted by the polarization of input photon pulse and the electron spin state of NV center, high fidelity NV center entangled states and photonic entangled states can be generated, respectively. The analyses of experimental feasibility show that our schemes work well with low quality resonators and weak coupling between qubits, which may be beneficial for exploring large-scale quantum information processing with diamond-based solid-state devices.
authors.affiliation: Center for the Condensed-Matter Science and Technology, Department of Physics, Harbin Institute of Technology, Harbin 150001, China.
authors.forename: Liu-Yong
authors.initials: LY
authors.lastname: Cheng
authors.forename: Hong-Fu
authors.initials: HF
authors.lastname: Wang
authors.forename: Shou
authors.initials: S
authors.lastname: Zhang
authors.forename: Kyu-Hwang
authors.initials: KH
authors.lastname: Yeon