An elementary optical gate for expanding entanglement web

Abstract

We introduce an elementary optical gate for expanding polarization entangled W states, in which every pair of photons are entangled alike. The gate is composed of a pair of 50:50 beamsplitters and ancillary photons in the two-photon Fock state. By seeding one of the photons in an $n$-photon W state into this gate, we obtain an $(n+2)$-photon W state after post-selection. This gate gives a better efficiency and a simpler implementation than previous proposals for $\mathrm{W}$-state preparation.

5 pages, 2 figures. To appear in Phys. Rev. A

References in corpus (5)

• Scalable multi-particle entanglement of trapped ions
• Experimental Observation of Four-Photon Entangled Dicke State with High Fidelity
• Full characterization of a three-photon GHZ state using quantum state tomography
• Local Conversion of Greenberger-Horne-Zeilinger States to Approximate W States
• Heralded generation of multiphoton entanglement

Cited by in corpus (33)

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• Quantum Fisher Information of W States in Decoherence Channels
• Local expansion of photonic W state using a polarization dependent beamsplitter
• Analysis of Entanglement Measures and LOCC Maximized Quantum Fisher Information of General Two Qubit Systems
• Demonstration of local expansion toward large-scale entangled webs
• Deterministic Local Expansion of W States
• Deterministic generation of large scale atomic W states
• Quantum entanglement distribution with hybrid parity gate
• Optimal local expansion of W states using linear optics and Fock states
• Generalized parity measurements
• Deterministic preparation of W states via spin-photon interactions
• Scalable $W$-type entanglement resource in neutral-atom arrays with Rydberg-dressed resonant dipole-dipole interaction
• Conversion from $W$ to Greenberger-Horne-Zeilinger states in the Rydberg-blockade regime of neutral-atom systems: Dynamical-symmetry-based approach
• Quantum Repeater for W states
• Photonic multipartite entanglement conversion using nonlocal operations
• Universal gates for transforming multipartite entangled Dicke states
• Generation of n-qubit W states using Spin Torque
• Dynamical generation of chiral $W$ and Greenberger-Horne-Zeilinger states in laser-controlled Rydberg-atom trimers
• Robust and Scalable Scheme to Generate Large-Scale Entanglement Webs
• Fusing atomic $W$ states via quantum Zeno dynamics
• Remote preparation of $W$ states from imperfect bipartite sources
• Simple scheme for expanding a polarization-entangled W state by adding one photon
• Efficient Fusion of Photonic W-states with Nonunitary Partial-swap Gates
• A Proposal for Quantum Fisher Information Optimization and its Relation with Entanglement Measures
• Circulating Genuine Multiparty Entanglement in Quantum Network
• Two methods for measuring Bell nonlocality via local unitary invariants of two-qubit systems in Hong-Ou-Mandel interferometers
• Deterministic construction of arbitrary $W$ states with quadratically increasing number of two-qubit gates
• Optimal nonlocal conversion of photonic four-partite entanglement from two Bell pairs in quantum networks
• Recovery of resources through sequential noisy measurements
• Scalable and modular generation of multipartite entangled states through memory-enhanced fusion