Trap-Integrated Superconducting Nanowire Single-Photon Detectors with Improved RF Tolerance for Trapped-Ion Qubit State Readout

Published

April 24, 2023

Author(s)

Benedikt Hampel, Daniel Slichter, Dietrich Leibfried, Richard Mirin, Sae Woo Nam, Varun Verma

Abstract

State readout of trapped-ion qubits with trap-integrated detectors can address important challenges for scalable quantum computing, but the strong radio frequency (rf) electric fields used for trapping can impact detector performance. Here, we report on NbTiN superconducting nanowire single-photon detectors (SNSPDs) employing grounded aluminum mirrors as electrical shielding that are integrated into linear surface-electrode rf ion traps. The shielded SNSPDs can be operated at applied rf trapping potentials of up to 54 V peak at 70 MHz and temperatures of up to 6 K, with a maximum system detection efficiency of 68%. This performance should be sufficient to enable parallel high-fidelity state readout of a wide range of trapped ion species in a typical cryogenic apparatus.

Citation

Applied Physics Letters

Volume

122

Issue

17

Pub Type

Journals

Download Paper

https://doi.org/10.1063/5.0145077

Local Download

Keywords

Superconducting devices, Single-photon detector, Ion-trap, Nanowires

Citation

Hampel, B. , Slichter, D. , Leibfried, D. , Mirin, R. , Nam, S. and Verma, V. (2023), Trap-Integrated Superconducting Nanowire Single-Photon Detectors with Improved RF Tolerance for Trapped-Ion Qubit State Readout, Applied Physics Letters, [online], https://doi.org/10.1063/5.0145077, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=936045 (Accessed October 13, 2025)