Advanced quantum technologies最新文献_第5页

Rainbow Trapping with Engineered Topological Corner States and Cavities in Photonic Crystals 利用工程拓扑角态和腔体在光子晶体中实现彩虹捕获

IF 4.4

Advanced quantum technologies Pub Date : 2024-06-24 DOI: 10.1002/qute.202400050

Naglaa AbdelAll, Mohamed Almokhtar, Ghada Khouqeer, Israa Abood, Sayed El. Soliman

{"title":"Rainbow Trapping with Engineered Topological Corner States and Cavities in Photonic Crystals","authors":"Naglaa AbdelAll, Mohamed Almokhtar, Ghada Khouqeer, Israa Abood, Sayed El. Soliman","doi":"10.1002/qute.202400050","DOIUrl":"10.1002/qute.202400050","url":null,"abstract":"This work presents a pioneering photonic crystal (PC) heterostructure design exploiting tailored topological corner states and cavities to unleash a fascinating topological rainbow effect. This effect arises from the strategic integration of a nontrivial topological PC with sharp corners within a trivial PC matrix, resulting in a heterostructure rich in corner states and cavities. The critical innovation lies in manipulating the sector angle of circular columns, granting dynamic control over the rainbow effect and light localization. This manipulation induces distinct group velocities for different light frequencies, leading to their separation and localization at specific corner states. This remarkable “rainbow trapping” phenomenon manifests as highly confined light exhibiting exceptional resilience against disorder. These findings illuminate a pathway toward crafting next-generation photonic devices boasting unparalleled functionalities. The reconfigurable rainbow trapping holds immense potential for applications in wavelength division multiplexing, optical sensing, and even venturing into quantum information processing.","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141512285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Observation of Superconductivity Up to 8.7 K in Reduced Potassium Tantalate 在还原钽酸钾中观察到高达 8.7 K 的超导电性

IF 4.4

Advanced quantum technologies Pub Date : 2024-06-24 DOI: 10.1002/qute.202400255

Xueshan Cao, Zhongran Liu, Jiayi Lu, Wenze Pan, Yishuai Wang, Yuexin Shi, Siyuan Hong, Ming Qin, Guanghan Cao, Meng Zhang, He Tian, Yanwu Xie

{"title":"Observation of Superconductivity Up to 8.7 K in Reduced Potassium Tantalate","authors":"Xueshan Cao, Zhongran Liu, Jiayi Lu, Wenze Pan, Yishuai Wang, Yuexin Shi, Siyuan Hong, Ming Qin, Guanghan Cao, Meng Zhang, He Tian, Yanwu Xie","doi":"10.1002/qute.202400255","DOIUrl":"10.1002/qute.202400255","url":null,"abstract":"The observation of superconductivity with a transition temperature (Tc) up to 8.7 K in KTaO3 single crystals annealed with CaH2 at 900–1000 °C is reported. The superconductivity is confirmed by both resistance and magnetization measurements and is 3D in nature. Characterizations of X-ray photoelectron spectroscopy, X-ray diffraction, and scanning transmission electron microscopy reveal that it locates in a 1-µm-order-thick polycrystalline surface layer that shows a rock-salt type structure, with a lattice constant of 0.454 nm, and can be chemically identified as KxTaOy (0.04 ≤ x ≤ 0.08, 1.24 ≤ y ≤ 1.35), depending on annealing conditions. Within the experimental ranges, the Tc is peaked at x ≈0.05, and increases with decreasing y, and the highest Tc is observed in K0.05TaO1.24. The Tc observed here is much higher than that of KTaO3, Ta, and pure TaO, and is also one of the highest among of all the known oxide superconductors with the same rock-salt structure. The rather high Tc and its close connection with KTaO3 and Ta, both of which are promising materials for quantum computing, make KxTaOy potentially interesting as a building block in constructing future superconducting quantum devices.","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141512287","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Highly Efficient Spin Current Transport Properties in Spintronic Devices Based on Topological Insulator 基于拓扑绝缘体的自旋电子器件中的高效自旋电流传输特性

IF 4.4

Advanced quantum technologies Pub Date : 2024-06-24 DOI: 10.1002/qute.202400041

Jijun Yun, Li Xi

引用次数: 0

Bright Tripartite Quantum Steering Generated by Above-Threshold Optical Parametric Oscillation 阈值以上光参量振荡产生的明亮三方量子转向

IF 4.4

Advanced quantum technologies Pub Date : 2024-06-24 DOI: 10.1002/qute.202400176

Shuangquan Ma, Xinyuan Cheng, Dayang Zhang, Youbin Yu, Guangri Jin, Aixi Chen

引用次数: 0

A New Protocol for Semi-quantum Private Set of Intersection and Union Mixed Cardinality for Any Tripartite Based on Bell States 基于贝尔状态的任意三方半量子私有交集和联合混合心数集的新协议

IF 4.4

Advanced quantum technologies Pub Date : 2024-06-21 DOI: 10.1002/qute.202400137

Yue-Ping Chi, Yu Zhang, Ke-Jia Zhang, Gang Xu, Xiu-Bo Chen

引用次数: 0

Topological Phase and Tunable Quantum State Transfer of Su–Schrieffer–Heeger Chain with an Embedded Quantum Ring 带有嵌入式量子环的苏-施里弗-希格链的拓扑相位和可调谐量子态转移

IF 4.4

Advanced quantum technologies Pub Date : 2024-06-19 DOI: 10.1002/qute.202400156

Xin-Yue Zhang, Yu Yan, Li-Na Zheng, Zhi-Xu Zhang, Li-Nan Zhong, Shou Zhang, Hong-Fu Wang

{"title":"Topological Phase and Tunable Quantum State Transfer of Su–Schrieffer–Heeger Chain with an Embedded Quantum Ring","authors":"Xin-Yue Zhang, Yu Yan, Li-Na Zheng, Zhi-Xu Zhang, Li-Nan Zhong, Shou Zhang, Hong-Fu Wang","doi":"10.1002/qute.202400156","DOIUrl":"https://doi.org/10.1002/qute.202400156","url":null,"abstract":"An extended Su–Schrieffer–Heeger (SSH) model consisting of an SSH chain with an embedded quantum ring (QR) is investigated. In the case of two SSH chains with a symmetric distribution with respect to QR, by calculating the real-space winding number and energy spectrum, the hopping amplitude-induced topological phase is discovered. The probability distributions of gap states and the relationship between energy and magnetic flux prove the existence of the Aharonov–Bohm effect in the QR. Moreover, in the case of asymmetric distribution, the model possesses a zero-energy mode within the energy gap, and it is found that it can realize quantum state transfer. By adjusting the connection site between the right SSH chain and QR, the direction of the output port can be flexibly engineered. Furthermore, it is shown that high-fidelity quantum state transfer can still be achieved with the increasing of the system size. The tunable quantum state transfer based on the zero-energy mode can be equivalent to a topological tunable directional switch with properties of non-directional transfer. This work provides an approach for studying topological phase transition and tunable topological devices in an SSH chain with an embedded QR.","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141986096","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Non-Hermitian Control of Multimode Duan-PPT Criteria and Steering in Energy-Level Cascaded Four-Wave Mixing Processes 能量级联四波混合过程中多模段-PPT 准则和转向的非赫米提控制

IF 4.4

Advanced quantum technologies Pub Date : 2024-06-19 DOI: 10.1002/qute.202400082

Jiajia Wei, Cheng Huang, Yandong He, Jiaxuan Wei, Wenqiang Qin, Haitian Tang, Ning Li, Feng Li, Yin Cai, Bo Li, Yanpeng Zhang

{"title":"Non-Hermitian Control of Multimode Duan-PPT Criteria and Steering in Energy-Level Cascaded Four-Wave Mixing Processes","authors":"Jiajia Wei, Cheng Huang, Yandong He, Jiaxuan Wei, Wenqiang Qin, Haitian Tang, Ning Li, Feng Li, Yin Cai, Bo Li, Yanpeng Zhang","doi":"10.1002/qute.202400082","DOIUrl":"https://doi.org/10.1002/qute.202400082","url":null,"abstract":"The non-Hermitian singularity control of multimode entanglement in the energy-level cascaded four-wave mixing system within a single atomic vapor is of great significance and importance. In this study, a non-Hermiticity system by means of quasi-quantization of energy-band based on non-Hermiticity systems is constructed. By employing atomic coherence in the non-Hermiticity system, high-dimensional quantized photon correlations underdressed field-induced parity-time (PT) symmetry and symmetry breaking through the quantization of energy levels are studied. Such a phenomenon happens at microscopic (nanoscale) when the eigenvalues of dressed energy-level and multimode entanglement are considered for both real and imaginary parts symmetry breaking. Double dressing effect is observed with more coherent channels and larger information capacity than single dressing in the energy-level cascaded four-wave mixing system. The study found that the splitting of the real part is larger than an imaginary part in a second-order system, and the imaginary part splitting is also greater than the real part splitting in a third-order system. The real part (in phase) is constructive dressing quantization, and the imaginary (out of phase) is destructive dressing quantization. Exceptional points (EP points) can be used to enhance sensitivity detection of entanglement quantum state.","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141597004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rydberg-Atom Graphs for Quadratic Unconstrained Binary Optimization Problems 用于二次无约束二元优化问题的雷德堡原子图

IF 4.4

Advanced quantum technologies Pub Date : 2024-06-19 DOI: 10.1002/qute.202300398

Andrew Byun, Junwoo Jung, Kangheun Kim, Minhyuk Kim, Seokho Jeong, Heejeong Jeong, Jaewook Ahn

{"title":"Rydberg-Atom Graphs for Quadratic Unconstrained Binary Optimization Problems","authors":"Andrew Byun, Junwoo Jung, Kangheun Kim, Minhyuk Kim, Seokho Jeong, Heejeong Jeong, Jaewook Ahn","doi":"10.1002/qute.202300398","DOIUrl":"https://doi.org/10.1002/qute.202300398","url":null,"abstract":"There is a growing interest in harnessing the potential of the Rydberg-atom system to address complex combinatorial optimization challenges. Here an experimental demonstration of how the quadratic unconstrained binary optimization (QUBO) problem can be effectively addressed using Rydberg-atom graphs is presented. The Rydberg-atom graphs are configurations of neutral atoms organized into mathematical graphs, facilitated by programmable optical tweezers, and designed to exhibit many-body ground states that correspond to the maximum independent set (MIS) of their respective graphs. Four elementary Rydberg-atom subgraph components are developed, not only to eliminate the need of local control but also to be robust against interatomic distance errors, while serving as the building blocks sufficient for formulating generic QUBO graphs. To validate the feasibility of the approach, a series of Rydberg-atom experiments selected to demonstrate proof-of-concept operations of these building blocks are conducted. These experiments illustrate how these components can be used to programmatically encode the QUBO problems to Rydberg-atom graphs and, by measuring their many-body ground states, how their QUBO solutions are determined subsequently.","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/qute.202300398","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141986049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Compact and Stable Diamond Quantum Sensors for Wide Applications 结构紧凑、性能稳定、应用广泛的金刚石量子传感器

IF 4.4

Advanced quantum technologies Pub Date : 2024-06-19 DOI: 10.1002/qute.202300456

Yuta Kainuma, Yuji Hatano, Takayuki Shibata, Naota Sekiguchi, Akimichi Nakazono, Hiromitsu Kato, Shinobu Onoda, Takeshi Ohshima, Mutsuko Hatano, Takayuki Iwasaki

{"title":"Compact and Stable Diamond Quantum Sensors for Wide Applications","authors":"Yuta Kainuma, Yuji Hatano, Takayuki Shibata, Naota Sekiguchi, Akimichi Nakazono, Hiromitsu Kato, Shinobu Onoda, Takeshi Ohshima, Mutsuko Hatano, Takayuki Iwasaki","doi":"10.1002/qute.202300456","DOIUrl":"https://doi.org/10.1002/qute.202300456","url":null,"abstract":"This study proposes compact, highly sensitive, and stable diamond quantum sensors for a wide range of applications, including biomedical and energy electronics. For enhanced sensitivity and alignment precision within the objective field, a high-quality, (111)-oriented 12C-enriched chemical vapor deposition (CVD) diamond, featuring a nitrogen-vacancy (NV) axis in the (111) direction, is employed as the sensor. To increase the fluorescence collection efficiency, the laser beam is irradiated from the side surface of the CVD diamond, and fluorescence is detected using a compound parabolic concentrator (CPC) lens. The floor noise level of the magnetic field signal is 44 pT/Hz0.5. An Allan deviation of 1.2 pT over 1000 s of averaging demonstrates stability. This is attributable to the integration of a balancing circuit to cancel out laser noise, alongside mechanisms to compensate for temperature fluctuations and a copper housing to shield against electromagnetic field noise.","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/qute.202300456","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142170332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Discrete-Modulated Continuous-Variable Quantum Key Distribution in Satellite-to-Ground Communication 卫星到地面通信中的离散调制连续可变量子密钥分发

IF 4.4

Advanced quantum technologies Pub Date : 2024-06-19 DOI: 10.1002/qute.202400140

Shi-Gen Li, Chen-Long Li, Wen-Bo Liu, Hua-Lei Yin, Zeng-Bing Chen

引用次数: 0