High-Fidelity Ion State Detection Using Trap-Integrated Avalanche Photodiodes

• URL: http://arxiv.org/abs/2202.01715v1
• Date: Thu, 3 Feb 2022 17:30:23 GMT
• Title: High-Fidelity Ion State Detection Using Trap-Integrated Avalanche Photodiodes
• Authors: David Reens, Michael Collins, Joseph Ciampi, Dave Kharas, Brian F. Aull, Kevan Donlon, Colin D. Bruzewicz, Bradley Felton, Jules Stuart, Robert J. Niffenegger, Philip Rich, Danielle Braje, Kevin K. Ryu, John Chiaverini, and Robert McConnell
• Abstract summary: Integrated technologies greatly enhance the prospects for practical quantum information processing and sensing devices based on trapped ions. High-speed and high-fidelity ion state readout is critical for any such application. We demonstrate ion quantum state detection at room temperature utilizing single-photon avalanche diodes (SPADs) integrated directly into the substrate of silicon ion trapping chips.
• Score: 1.5524313805031773
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Integrated technologies greatly enhance the prospects for practical quantum information processing and sensing devices based on trapped ions. High-speed and high-fidelity ion state readout is critical for any such application. Integrated detectors offer significant advantages for system portability and can also greatly facilitate parallel operations if a separate detector can be incorporated at each ion-trapping location. Here we demonstrate ion quantum state detection at room temperature utilizing single-photon avalanche diodes (SPADs) integrated directly into the substrate of silicon ion trapping chips. We detect the state of a trapped $^{88}\text{Sr}^{+}$ ion via fluorescence collection with the SPAD, achieving $99.92(1)\%$ average fidelity in 450 $\mu$s, opening the door to the application of integrated state detection to quantum computing and sensing utilizing arrays of trapped ions.

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