Explanipedia

A Fully‐Integrated Diamond Nitrogen‐Vacancy Magnetometer with Nanotesla Sensitivity Open

Yulin Dai, Wenhui Tian, Qing Liu, Bao Chen, Yushan Liu , et al. · 2024

Ensemble diamond nitrogen‐vacancy (DNV) centers have emerged as a promising platform for precise earth‐field vector magnetic sensing, particularly in applications that require high mobility. Nevertheless, integrating all control utilities …

Suppressing Thermal Noise to Sub-Millikelvin Level in a Single-Spin Quantum System Using Realtime Frequency Tracking Open

Zhiyi Hu, Jingyan He, Runchuan Ye, Xue Lin, Feifei Zhou , et al. · 2024

A single nitrogen-vacancy (NV) center in a diamond can be used as a nanoscale sensor for magnetic field, electric field or nuclear spins. Due to its low photon detection efficiency, such sensing processes often take a long time, suffering …

Direct readout of a nitrogen-vacancy hybrid-spin quantum register in diamond by analysis of photon arrival time Open

Jingyan He, Yu Tian, Zhiyi Hu, Runchuan Ye, Xiangyu Wang , et al. · 2024

Quantum state readout plays a pivotal role in quantum technologies, spanning\napplications in sensing, computation, and secure communication. In this work,\nwe introduce a new approach for efficiently reading populations of hybrid-spin\nst…

Four-Order Power Reduction in Nanoscale Electron–Nuclear Double Resonance with a Nitrogen-Vacancy Center in Diamonds Open

Zhiyi Hu, Feng-Jian Jiang, Jingyan He, Yulin Dai, Ya Wang , et al. · 2024

Detecting nuclear spins using single nitrogen-vacancy (NV) centers is of particular importance in nanoscale science and engineering but often suffers from the heating effect of microwave fields for spin manipulation, especially under high …

Multipoint Lock-in Detection for Diamond Nitrogen-Vacancy Magnetometry Using DDS-Based Frequency-Shift Keying Open

Qidi Hu, Luheng Cheng, Yushan Liu, Xinyi Zhu, Yu Tian , et al. · 2023

In recent years, the nitrogen-vacancy (NV) center in diamonds has been demonstrated to be a high-performance multiphysics sensor, where a lock-in amplifier (LIA) is often adopted to monitor photoluminescence changes around the resonance. I…

An field programmable gate array (FPGA)-based device for charge-state readout of nitrogen-vacancy (NV) center in diamond with nanosecond feedback speed Open

Runchuan Ye, Yunpeng Zhai, Yushan Liu, Xue Lin, Nanyang Xu · 2023

Ionization of nitrogen-vacancy (NV) center in diamond from the NV− to NV0 state is a destructive process in applications, where a large amount of time is cost for high-fidelity readout. To this end, real-time adaptive feedback would be hel…

Resource-efficient Direct Characterization of General Density Matrix Open

Liang Xu, Ming-Ti Zhou, Runxia Tao, Zhipeng Zhong, B. G. Wang , et al. · 2023

Sequential weak measurements allow the direct extraction of individual density-matrix elements instead of globally reconstructing the whole density matrix, opening a new avenue for the characterization of quantum systems. Nevertheless, the…

A DDS-based integrated microwave source for fast frequency sweeping in quantum magnetic-resonance systems Open

Yushan Liu, Runchuan Ye, Qidi Hu, Bao Chen, Wenchao Zhang , et al. · 2023

Magnetic resonance is a fundamental method to manipulate qubits in spin-based quantum information processing. In such areas, the functionality of fast frequency sweeping is required to determine the resonance of the system. We provide a ha…

Online optimization for optical readout of a single electron spin in diamond Open

Xue Lin, Jingwei Fan, Runchuan Ye, Ming-Ti Zhou, Yumeng Song , et al. · 2022

The nitrogen-vacancy (NV) center in diamond has been developed as a promising platform for quantum sensing, especially for magnetic field measurements in the nano-tesla range with a nanometer resolution. Optical spin readout performance ha…

Preserving entanglement in a solid-spin system using quantum autoencoders Open

Feifei Zhou, Yu Tian, Yumeng Song, Chu-Dan Qiu, Xiangyu Wang , et al. · 2022

Entanglement, as a key resource for modern quantum technologies, is extremely fragile due to the decoherence. Here, we show that a quantum autoencoder, which is trained to compress a particular set of quantum entangled states into a subspa…

Sensitivity-enhanced magnetometry using nitrogen-vacancy ensembles via adaptively complete transitions overlapping Open

Bao Chen, Bing Chen, Xinyi Zhu, Zhifei Yu, Qian Peng , et al. · 2022

Nitrogen-vacancy (NV) centers in diamond are suitable sensors of high-sensitivity magnetometry which have attracted much interest in recent years. Here, we demonstrate sensitivity-enhanced ensembles magnetometry via adaptively complete tra…

Noise prediction and reduction of single electron spin by deep-learning-enhanced feedforward control Open

Nanyang Xu, Feifei Zhou, Xiangyu Ye, Xue Lin, Bao Chen , et al. · 2022

Noise-induced control imperfection is an important problem in applications of diamond-based nano-scale sensing, where measurement-based strategies are generally utilized to correct low-frequency noises in realtime. However, the spin-state …

Mixed-signal data acquisition system for optically detected magnetic resonance of solid-state spins Open

Feifei Zhou, Shupei Song, Yuxuan Deng, Ting Zhang, Bing Chen , et al. · 2021

We report a mixed-signal data acquisition (DAQ) system for optically detected magnetic resonance (ODMR) of solid-state spins. This system is designed and implemented based on a field-programmable-gate-array chip assisted with high-speed pe…

Digital Quantum Simulation of Floquet Topological Phases with a Solid-State Quantum Simulator Open

Bing Chen, Shuo Li, Xianfei Hou, Feifei Zhou, Peng Qian , et al. · 2020

Quantum simulator with the ability to harness the dynamics of complex quantum systems has emerged as a promising platform for probing exotic topological phases. Since the flexibility offered by various controllable quantum systems has enab…

Calibration-Free Vector Magnetometry Using Nitrogen-Vacancy Center in Diamond Integrated with Optical Vortex Beam Open

Bing Chen, Xianfei Hou, Feifei Ge, Xiaohan Zhang, Yunlan Ji , et al. · 2020

We report a new method to determine the orientation of individual nitrogen-vacancy (NV) centers in a bulk diamond and use them to realize a calibration-free vector magnetometer with nanoscale resolution. Optical vortex beam is used for opt…

Pulse-width-induced polarization enhancement of optically-pumped N-V electron spin in diamond Open

Yumeng Song, Yu Tian, Zhiyi Hu, Feifei Zhou, Tengteng Xing , et al. · 2019

The nitrogen-vacancy (N-V) center in diamond is a widely-used platform for quantum information processing and metrology. The electron-spin state of N-V center could be initialized and readout optically, and manipulated by resonate microwav…

Dynamically Polarizing Spin Register of N- Centers in Diamond Using Chopped Laser Pulses Open

Nanyang Xu, Yu Tian, Bing Chen, Jianpei Geng, HE Xiao-xiong , et al. · 2019

Nuclear spins nearby nitrogen-vacancy (NV) centers in diamond are excellent\nquantum memory for quantum computing and quantum sensing, but are difficult to\nbe initialized due to their weak interactions with the environment. Here we\npropo…

Wavelet-based fast time-resolved magnetic sensing with electronic spins in diamond Open

Nanyang Xu, Feng-Jian Jiang, Yu Tian, Jianfeng Ye, Fazhan Shi , et al. · 2016

Time-resolved magnetic sensing is of great importance from fundamental\nstudies to applications in physical and biological sciences. Recently the\nnitrogen-vacancy (NV) defect center in diamond has been developed as a\npromising sensor of …

Experimental Realization of a Quantum Support Vector Machine Open

Zhaokai Li, Xiaomei Liu, Nanyang Xu, Jiangfeng Du · 2015

The fundamental principle of artificial intelligence is the ability of machines to learn from previous experience and do future work accordingly. In the age of big data, classical learning machines often require huge computational resource…

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