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Quantum Physics
Title: Ion Trap with In-Vacuum High Numerical Aperture Imaging for a Dual-Species Modular Quantum Computer
(Submitted on 10 Oct 2023 (this version), latest version 26 Mar 2024 (v2))
Abstract: Photonic interconnects between quantum systems will play a central role in both scalable quantum computing and quantum networking. Entanglement of remote qubits via photons has been demonstrated in many platforms; however, improving the rate of entanglement generation will be instrumental for integrating photonic links into modular quantum computers. We present an ion trap system that has the highest reported free-space photon collection efficiency for quantum networking. We use a pair of in-vacuum aspheric lenses, each with a numerical aperture of 0.8, to couple 10% of the 493 nm photons emitted from a $^{138}$Ba$^+$ ion into single-mode fibers. We also demonstrate that proximal effects of the lenses on the ion position and motion can be mitigated.
Submission history
From: Allison Carter [view email][v1] Tue, 10 Oct 2023 22:44:44 GMT (1604kb,D)
[v2] Tue, 26 Mar 2024 21:46:44 GMT (13188kb,D)
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