Robust and Scalable Scheme to Generate Large-Scale Entanglement Webs

Abstract

We propose a robust and scalable scheme to generate an $N$-qubit $W$ state among separated quantum nodes (cavity-QED systems) by using linear optics and postselections. The present scheme inherits the robustness of the Barrett-Kok scheme [Phys. Rev. A {\bf 71}, 060310(R) (2005)]. The scalability is also ensured in the sense that an arbitrarily large $N$-qubit $W$ state can be generated with a quasi-polynomial overhead $\sim 2^{O[({\log }_{2}N{)}^2]}$. The process to breed the $W$ states, which we introduce to achieve the scalability, is quite simple and efficient, and can be applied for other physical systems.

5 pages, 3 figures

References in corpus (10)

• Quantum Teleportation Between Distant Matter Qubits
• Robust creation of entanglement between ions in spatially separate cavities
• Prospects for measurement-based quantum computing with solid state spins
• Robust Preparation of GHZ and W States of Three Distant Atoms
• Probabilistic Quantum Gates between Remote Atoms through Interference of Optical Frequency Qubits
• Fully fault tolerant quantum computation with non-deterministic gates
• Distillation of multipartite entanglement by complementary stabilizer measurements
• Fault-Tolerant Topological One-Way Quantum Computation with Probabilistic Two-Qubit Gates
• Robust creation of arbitrary-sized Dicke states using a single laser pulse
• Optimal local expansion of W states using linear optics and Fock states

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• Three-dimensional cavity-assisted spontaneous emission as a single-photon source: two cavity modes and Rabi resonance
• Z-States Algebra for a Tunable Multi-Party Entanglement-Distillation Protocol