Full qubit control of the double quantum transition in NV centers for low-field or high-frequency sensing

IF 5.6 2区 物理与天体物理 Q1 OPTICS
Alberto López-García, Javier Cerrillo
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引用次数: 0

Abstract

We present a scheme for the implementation of fast arbitrary qubit gates in the ground state of the negatively charged nitrogen-vacancy (NV) defect in diamond. The protocol is especially useful for sensing in two regimes: on the one hand, in the low-field limit where the Zeeman splitting of the NV-center is smaller than the MW Rabi frequency; on the other hand, for the detection of high-frequency signals, comparable to the Zeeman splitting of the NV center. It constitutes an extension to the NV-ERC technique, which has demonstrated efficient initialization and readout of the double quantum transition with no leakage to any third level thanks to an effective Raman coupling. Here we derive a full theoretical framework of the scheme, identifying the complete unitary associated to the approach, and more specifically the relevant basis transformation for each of two characteristic pulse durations. Based on this insight, we propose a scheme to perform fast single qubit gates in the double quantum transition. We study its robustness with respect to pulse-timing errors resulting from faulty identification of system parameters or phase-control limitations. We finally demonstrate that the technique can also be implemented in the presence of unknown electric or strain fields and numerically test its effectiveness in a Hahn echo sequence in the high-frequency or low-field regime.

低场或高频传感中NV中心双量子跃迁的全量子位控制
提出了一种在金刚石负电荷氮空位(NV)缺陷基态上实现快速任意量子比特门的方案。该协议在两种情况下特别有用:一方面,在低场极限下,nv中心的塞曼分裂小于毫瓦拉比频率;另一方面,对于高频信号的检测,可与塞曼分裂的NV中心相媲美。它构成了NV-ERC技术的扩展,该技术已经证明了双量子跃迁的有效初始化和读出,由于有效的拉曼耦合,没有泄漏到任何第三能级。在这里,我们推导了该方案的完整理论框架,确定了与该方法相关的完全酉,更具体地说,是两个特征脉冲持续时间中的每个的相关基变换。基于这一见解,我们提出了一种在双量子跃迁中执行快速单量子比特门的方案。我们研究了它对于由系统参数识别错误或相位控制限制引起的脉冲定时误差的鲁棒性。我们最后证明,该技术也可以在存在未知电场或应变场的情况下实施,并在高频或低场状态下的哈恩回波序列中进行数值测试。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
EPJ Quantum Technology
EPJ Quantum Technology Physics and Astronomy-Atomic and Molecular Physics, and Optics
CiteScore
7.70
自引率
7.50%
发文量
28
审稿时长
71 days
期刊介绍: Driven by advances in technology and experimental capability, the last decade has seen the emergence of quantum technology: a new praxis for controlling the quantum world. It is now possible to engineer complex, multi-component systems that merge the once distinct fields of quantum optics and condensed matter physics. EPJ Quantum Technology covers theoretical and experimental advances in subjects including but not limited to the following: Quantum measurement, metrology and lithography Quantum complex systems, networks and cellular automata Quantum electromechanical systems Quantum optomechanical systems Quantum machines, engineering and nanorobotics Quantum control theory Quantum information, communication and computation Quantum thermodynamics Quantum metamaterials The effect of Casimir forces on micro- and nano-electromechanical systems Quantum biology Quantum sensing Hybrid quantum systems Quantum simulations.
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