Chiral Quantum-Optical Elements for Waveguide-QED with Sub-wavelength Rydberg-Atom Arrays

• URL: http://arxiv.org/abs/2407.01133v1
• Date: Mon, 1 Jul 2024 09:55:47 GMT
• Title: Chiral Quantum-Optical Elements for Waveguide-QED with Sub-wavelength Rydberg-Atom Arrays
• Authors: Lida Zhang, Fan Yang, Klaus Mølmer, Thomas Pohl,
• Abstract summary: We describe an approach to achieve near-perfect unidirectional light-matter coupling to an effective quantum emitter formed by a subwavelength array of atoms in the Rydberg-blockade regime. The described setup can function as a versatile nonlinear optical element in a free-space photonic quantum network with simple linear elements.
• Score: 2.5652402930898988
• License: http://creativecommons.org/licenses/by-sa/4.0/
• Abstract: We describe an approach to achieve near-perfect unidirectional light-matter coupling to an effective quantum emitter that is formed by a subwavelength array of atoms in the Rydberg-blockade regime. The nonlinear reflection and transmission of such two-dimensional superatoms are exploited in different interferometric setups for the deterministic generation of tunable single photons and entangling two-photon operations with high fidelities, $\mathcal{F}\gtrsim0.999$. The described setup can function as a versatile nonlinear optical element in a free-space photonic quantum network with simple linear elements and without the need of additional mode confinement, optical resonators, or optical isolators.

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