Entanglement filter with Rydberg atoms

Abstract

Devices capable of deterministically manipulating the photonic entanglement are of paramount importance, since photons are the ideal messengers for quantum information. Here, we report a Rydberg-atom-based entanglement filter that preserves the desired photonic entangled state and deterministically blocks the transmission of the unwanted ones. Photonic entanglement with near-unity fidelity can be extracted from an input state with an arbitrarily low initial fidelity. The protocol is inherently robust, and succeeds both in the Rydberg blockade regime and in the interaction-induced dissipation regime. Such an entanglement filter opens new routes toward scalable photonic quantum information processing with multiple ensembles of Rydberg atoms.

10 pages for manuscript with 4 figures, 16 pages for Supplementary information with 7 figures and 2 tables

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Cited by in corpus (11)

• Rydberg superatoms: An artificial quantum system for quantum information processing and quantum optics
• Selective Filtering of Photonic Quantum Entanglement via Anti-Parity-Time Symmetry
• Realization of a programmable multi-purpose photonic quantum memory with over-thousand qubit manipulations
• Strongly non-linear interaction between non-classical light and a blockaded Rydberg atomic ensemble
• Enhancement of Rydberg Blockade via Microwave Dressing
• Quantum Teleportation from Telecom Photons to Erbium-ion Ensembles
• Controlled dissipation for Rydberg atom experiments
• Non-Hermitian unidirectional routing of photonic qubits
• Continuously tunable single-photon level nonlinearity with Rydberg state wave-function engineering
• Dark-state photonic entanglement filters
• Coherence enhancement of Rydberg polaritons