2012/02/21 by Wen-An Li, L. F. Wei, Lian-Fu Wei
Computer Science · Physics and Astronomy · #Mechanical and Optical Resonators #Photon #Quantum #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum Zeno effect #Quantum decoherence #Quantum entanglement #Quantum optics #Quantum state #Spontaneous emission #Von Neumann architecture #Von Neumann entropy #W state #quant-ph
paper · pdf · doi:10.1364/oe.20.013440
published as Optics Express, Vol. 20, Issue 12, pp. 13440-13450 (2012) · 14 pages, 8 figures
arxiv created 2012/02/21 · openalex publication_date 2012/05/31 · arxiv updated 2012/06/04 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
By using quantum Zeno dynamics, we propose a controllable approach to deterministically generate tripartite GHZ states for three atoms trapped in spatially separated cavities. The nearest-neighbored cavities are connected via optical fibers and the atoms trapped in two ends are tunably driven. The generation of the GHZ state can be implemented by only one step manipulation, and the EPR entanglement between the atoms in two ends can be further realized deterministically by Von Neumann measurement on the middle atom. Note that the duration of the quantum Zeno dynamics is controllable by switching on/off the applied external classical drivings and the desirable tripartite GHZ state will no longer evolve once it is generated. The robustness of the proposal is numerically demonstrated by considering various decoherence factors, including atomic spontaneous emissions, cavity decays and fiber photon leakages, etc. Our proposal can be directly generalized to generate multipartite entanglement by still driving the atoms in two ends.