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Emmeline2002 committed Feb 14, 2024
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10 changes: 4 additions & 6 deletions paper.bib
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Expand Up @@ -9,9 +9,7 @@ @article{ Stefanazzi:2022
year = {2022},
month = {04},
issn = {0034-6748},
doi = {10.1063/5.0076249},
url = {https://doi.org/10.1063/5.0076249},
eprint = {https://pubs.aip.org/aip/rsi/article-pdf/doi/10.1063/5.0076249/16607898/044709\_1\_online.pdf},
doi = {10.1063/5.0076249}
}

@misc{Bourdeauducq:2016,
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title={Open Hardware in Quantum Technology},
author={Shammah, Nathan and Roy, Anurag Saha and Almudever, Carmen G and Bourdeauducq, S{\'e}bastien and Butko, Anastasiia and Cancelo, Gustavo and Clark, Susan M and Heinsoo, Johannes and Henriet, Lo{\"\i}c and Huang, Gang and others},
journal={arXiv preprint arXiv:2309.17233},
year={2023}
year={2023},
doi={10.48550/arXiv.2309.17233}
}


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}
@article{Henshaw:2023,
doi = {10.1088/2633-4356/ace095},
url = {https://dx.doi.org/10.1088/2633-4356/ace095},
year = {2023},
month = {jul},
publisher = {IOP Publishing},
volume = {3},
number = {3},
pages = {035001},
author = {Jacob Henshaw and Pauli Kehayias and Luca Basso and Michael Jaris and Rong Cong and Michael Titze and Tzu-Ming Lu and Michael P Lilly and Andrew M Mounce},
author = {Jacob Henshaw and Pauli Kehayias and Luca Basso and Michael Jaris and Rong Cong and Michael Titze and {Tzu-Ming} Lu and Michael P Lilly and Andrew M Mounce},
title = {Mitigation of nitrogen vacancy photoluminescence quenching from material integration for quantum sensing},
journal = {Materials for Quantum Technology },
abstract = {The nitrogen-vacancy (NV) color center in diamond has demonstrated great promise in a wide range of quantum sensing. Recently, there have been a series of proposals and experiments using NV centers to detect spin noise of quantum materials near the diamond surface. This is a rich complex area of study with novel nano-magnetism and electronic behavior, that the NV center would be ideal for sensing. However, due to the electronic properties of the NV itself and its host material, getting high quality NV centers within nanometers of such systems is challenging. Band bending caused by space charges formed at the metal-semiconductor interface force the NV center into its insensitive charge states. Here, we investigate optimizing this interface by depositing thin metal films and thin insulating layers on a series of NV ensembles at different depths to characterize the impact of metal films on different ensemble depths. We find an improvement of coherence and dephasing times we attribute to ionization of other paramagnetic defects. The insulating layer of alumina between the metal and diamond provide improved photoluminescence and higher sensitivity in all modes of sensing as compared to direct contact with the metal, providing as much as a factor of 2 increase in sensitivity, decrease of integration time by a factor of 4, for NV T 1 relaxometry measurements.}
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2 changes: 1 addition & 1 deletion paper.md
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Expand Up @@ -55,7 +55,7 @@ Specifically, the QICK-DAWG package consists of FPGA firmware (modified from t

# Related Work

Recent open-source software and commercially available RFSoC FPGA evaluation boards provide a strong foundation for developing an open-source control measurement, software, and firmware package for NVs and other diamond quantum defects. Open-source software packages for quantum control and data acquisition such as ARTIQ [@Bourdeauducq:2016], Qubic [@ Xu:2023], and QICK [@Stefanazzi:2022] have been continually developed over the past decade for a variety of quantum experiments. These packages have been developed in response to the shortcoming in both in-house and existing commercial based quantum control systems. Focusing on hardware, recently available RFSoC FPGAs including Xilinx’s ZCU216, Xilinx’s ZCU111 and Real Digital’s RFSoC4x2 can generate control pulses at high frequencies (6–10GHz) and digitize signals from photodiodes and single photon detector modules at high sample rates. The precise high-frequency pulse generation, readout capability, compact size, and relatively low cost of these RFSoC FPGAs make them ideal candidates for defect control hardware.
Recent open-source software and commercially available RFSoC FPGA evaluation boards provide a strong foundation for developing an open-source control measurement, software, and firmware package for NVs and other diamond quantum defects. Open-source software packages for quantum control and data acquisition such as ARTIQ [@Bourdeauducq:2016], Qubic [@Xu:2023], and QICK [@Stefanazzi:2022] have been continually developed over the past decade for a variety of quantum experiments. These packages have been developed in response to the shortcoming in both in-house and existing commercial based quantum control systems. Focusing on hardware, recently available RFSoC FPGAs including Xilinx’s ZCU216, Xilinx’s ZCU111 and Real Digital’s RFSoC4x2 can generate control pulses at high frequencies (6–10GHz) and digitize signals from photodiodes and single photon detector modules at high sample rates. The precise high-frequency pulse generation, readout capability, compact size, and relatively low cost of these RFSoC FPGAs make them ideal candidates for defect control hardware.

QICK provides firmware, a high-level Python user interface, and accessible inexpensive hardware making it an ideal platform for extension. Both QICK and Qubic utilize RFSoC FPGAs, however only QICK provides firmware for Real Digital’s RFSoC4x2, the lowest cost commercial off the shelf FPGA board. QICK also provides a high-level Python user interface that supports rapid implementation and simple in lab parameter modification . Additionally, QICK is already a popular software package; QICK has been applied to superconducting, spin, atomic, molecular, and optical qubit systems, and has reached 40 labs in the last two years [@Shammah:2023]. Simple modification to QICK firmware, hardware and software is necessary for implementation of QICK in spin-based quantum control experiments like NVs and other diamond quantum defects. QICK-DAWG implements these modifications, extending QICK.

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