New Color Centers in Diamond: Towards Broadband Quantum Memories

钻石的新色心：迈向宽带量子存储器

基本信息

批准号：
1820930
负责人：
Alexey Akimov
金额：
$ 40万
依托单位：
Texas A&M University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2018
资助国家：
美国
起止时间：
2018-09-01 至 2021-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1820930&HistoricalAwards=false
关键词：
New Color Centers Diamond Towards

项目摘要

Information technologies are among the main pillars of society, and information security is becoming more important. One direction for improving the security of future information systems is to utilize quantum communication lines. Based on laws of nature, such lines do not allow non-traceable copying of the information transmitted. But the same physics that makes them secure (i.e. the non-cloning theorem) also forbids the use of classical repeaters, which in turn limits communication distance and speed. This issue may be overcome by using quantum repeaters, the key ingredient of which is a quantum memory device. The aim of this project is to develop a novel solid-state quantum memory based on quantum states of color centers in diamond. This project will utilize theoretical and experimental advances developed at Texas A&M University both for the memory access protocol and for its physical implementation. This research project will strengthen the US presence in the field of optical ensemble-based solid-state quantum memories. It will also help train the next generation of scientists in this dynamically developing interdisciplinary field of research. Graduate and undergraduate students will get involved in the investigations through participation in the experiments, developing theoretical models, programming, collecting and interpreting experimental data, and numerical simulations. The investigators will also incorporate the obtained results into courses.This project focuses on new color centers, namely, Germanium Vacancies and Silicon Vacancies in diamond (GeV and SiV) for pioneering experimental realization of an ensemble based broadband quantum memory in diamond. This realization will be achieved using a new approach to quantum memory based on a discrete spatial chirp of a control field that has recently been suggested by the co-PIs. The outcome of this work, a single-photon solid-state interface, will be a milestone on the way to a scalable universal optical quantum computer. In comparison to existing technologies, like rare-earth doped crystals and nitrogen vacancy centers in diamond (NV), SiV and GeV have stronger optical interaction and less spectral diffusion (and inhomogeneous linewidths). The stronger zero-phonon line gives more efficient interaction of a single photon with a single silicon-vacancy, while a narrow inhomogeneous line broadening favors ensemble-based quantum memories. Other advantages of GeV and SiV are the presence of polarization selection rules and large (160 GHz and 50 GHz accordingly) energy level splitting in the ground state. The last one allows for large storage bandwidth. It is worth pointing out that multi-GHz vs MHz bandwidth is a key advantage of an optical over RF quantum networks (i.e. superconducting circuits (SCC)). The only disadvantage of GeV and SiV is a shorter electron-spin coherence time. However, it has been shown that this can be dramatically increased, up to 13 ms, by cooling SiV down to 100 mK.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

信息技术是社会的主要支柱之一，信息安全变得越来越重要。提高未来信息系统安全性的一个方向是利用量子通信线路。根据自然定律，这种行不允许不可追踪的传输信息复制。但是，使它们安全的物理学（即非关闭定理）也禁止使用经典中继器，这又限制了通信距离和速度。可以通过使用量子中继器来克服此问题，量子中继器的关键成分是量子存储器设备。该项目的目的是开发基于钻石颜色中心的量子状态的新型固态量子记忆。该项目将利用德克萨斯州A＆M大学开发的理论和实验进步来进行内存访问协议及其物理实施。该研究项目将加强美国在基于光学集成的固态量子记忆领域的存在。它还将帮助培训下一代科学家在这一动态发展的研究领域。研究生和本科生将通过参与实验，开发理论模型，编程，收集和解释实验数据以及数值模拟来参与调查。研究人员还将将获得的结果纳入课程中。该项目侧重于钻石（GEV和SIV）的新颜色中心，即锗空位和硅空缺，以开创钻石中基于集合的宽带量子记忆的实验实现。基于Co-Pis最近已建议的控制场的离散空间chirp，将使用一种新的量子记忆方法来实现这种实现。这项工作的结果是单光子固态接口，将是通往可扩展通用光学量子计算机的路上的里程碑。与现有技术相比，例如钻石（NV）中的稀土掺杂晶体和氮空位中心，SIV和GEV具有更强的光学相互作用，光谱扩散较少（和不均匀的线宽）。较强的零子线可提供单个光子与单个硅接面的更有效相互作用，而狭窄的不均匀线扩大了基于集合的量子记忆。 GEV和SIV的其他优点是极化选择规则的存在，并且在基态下的能量水平分裂（相应地相应地）。最后一个允许大型存储带宽。值得指出的是，多GHz与MHz带宽是光学上的关键优势，而不是RF量子网络（即超导电路（SCC））。 GEV和SIV的唯一缺点是较短的电子旋转连贯时间。但是，已经证明，通过将SIV降低到100 MK，可以大幅提高到13毫秒。该奖项反映了NSF的法定任务，并使用基金会的知识分子优点和更广泛的影响审查标准，认为值得通过评估值得支持。

项目成果

期刊论文数量（11）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Compact design of a gallium phosphide nanobeam cavity for coupling to diamond germanium-vacancy centers

DOI：
10.1364/ome.9.001678
发表时间：
2019-04
期刊：
Optical Materials Express
影响因子：
2.8
作者：
Abdulrahman Alajlan;I. Cojocaru;A. Akimov
通讯作者：
Abdulrahman Alajlan;I. Cojocaru;A. Akimov

Compact QED system of single photon emitter coupled to silicon nitride nanobeam

与氮化硅纳米束耦合的单光子发射器的紧凑型 QED 系统

DOI：
10.1117/12.2566349
发表时间：
2020
期刊：
PROCEEDINGS OF SPIE
影响因子：
0
作者：
Khurana, Mohit;Alajlan, Abdulrahman;Liu, Xiaohan;Akimov, Alexey
通讯作者：
Akimov, Alexey

Temporal and spectral control of the X-ray pulses in a resonant medium with a modulated transition frequency

具有调制跃迁频率的谐振介质中 X 射线脉冲的时间和光谱控制

DOI：
10.1117/12.2593321
发表时间：
2021
期刊：
2020
影响因子：
0
作者：
Vagizov, Farit;Antonov, Vladimir;Khairulin, Ilias;Radeonychev, Yevgeny;Han, Kyong-Chol;Kocharovskaya, Olga
通讯作者：
Kocharovskaya, Olga

Attosecond Pulse Amplification in a Plasma-Based X-Ray Laser Dressed by an Infrared Laser Field