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Generation of Tunable Three-Photon Entanglement in Cubic Nonlinear Coupled Waveguides
IF 4.4
Advanced quantum technologies Pub Date : 2024-11-27 DOI: 10.1002/qute.202400409
Miguel Y. Bacaoco, Max J. Galettis, James Huang, Denis Ilin, Alexander S. Solntsev
{"title":"Generation of Tunable Three-Photon Entanglement in Cubic Nonlinear Coupled Waveguides","authors":"Miguel Y. Bacaoco,&nbsp;Max J. Galettis,&nbsp;James Huang,&nbsp;Denis Ilin,&nbsp;Alexander S. Solntsev","doi":"10.1002/qute.202400409","DOIUrl":"https://doi.org/10.1002/qute.202400409","url":null,"abstract":"<p>The generation of three-photon states with spatial entanglement in cubic nonlinear coupled waveguides is theoretically investigated using third-order spontaneous parametric down-conversion and quantum walks. This approach involves independently pumping two coupled waveguides to generate a path-encoded three-photon Greenberger–Horne–Zeilinger (GHZ) state, which then evolves with complex spatial dynamics governed by coupling coefficients and phase mismatch. By appropriate parameter tuning, the generation of robust heralded Bell states is demonstrated, uniform states, and GHZ-like states at the chip output. This work demonstrates an integrated source of three-photon spatial entanglement on a simple chip, offering additional reconfigurability for advanced multiphoton quantum applications.</p>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"8 5","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143944995","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
Advantage of Non-Gaussian Operations in Phase Estimation via Mach–Zehnder Interferometer 非高斯运算在Mach-Zehnder干涉仪相位估计中的优势
IF 4.4
Advanced quantum technologies Pub Date : 2024-11-27 DOI: 10.1002/qute.202400192
Manali Verma, Chandan Kumar, Karunesh K. Mishra, Prasanta K. Panigrahi
{"title":"Advantage of Non-Gaussian Operations in Phase Estimation via Mach–Zehnder Interferometer","authors":"Manali Verma,&nbsp;Chandan Kumar,&nbsp;Karunesh K. Mishra,&nbsp;Prasanta K. Panigrahi","doi":"10.1002/qute.202400192","DOIUrl":"https://doi.org/10.1002/qute.202400192","url":null,"abstract":"<p>This study investigates the benefits of probabilistic non-Gaussian operations in phase estimation using difference-intensity and parity detection-based Mach–Zehnder interferometers (MZI). An experimentally implementable model is considered to perform three different non-Gaussian operations, namely photon subtraction (PS), photon addition (PA), and photon catalysis (PC) on a single-mode squeezed vacuum (SSV) state. The findings reveal that all non-Gaussian operations except one PC operation provide an advantage in either of the measurement schemes. This result is further supported by the analysis of the quantum Cramér–Rao bound. When accounting for the success probability of non-Gaussian operations, two-PC and four-PA emerges as the most optimal operations in difference-intensity and parity detection-based MZI, respectively. Additionally, the corresponding squeezing and transmissivity parameters that yields the best performance are identified, making the study relevant for experimentalists. Furthermore, a general expression for the moment-generating function is derived, which is useful in exploring other detection schemes such as homodyne detection and quadratic homodyne detection.</p>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"8 5","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/qute.202400192","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143944996","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
Sensing Applications of PT-Symmetry in Non-Hermitian Photonic Systems pt对称性在非厄米光子系统中的传感应用
IF 4.4
Advanced quantum technologies Pub Date : 2024-11-27 DOI: 10.1002/qute.202400349
Zuoxian Wang, Zihua Liang, Jinsheng Hu, Peng Zhou, Lu Liu, Gen Hu, Weiyi Wang, Mao Ye
{"title":"Sensing Applications of PT-Symmetry in Non-Hermitian Photonic Systems","authors":"Zuoxian Wang,&nbsp;Zihua Liang,&nbsp;Jinsheng Hu,&nbsp;Peng Zhou,&nbsp;Lu Liu,&nbsp;Gen Hu,&nbsp;Weiyi Wang,&nbsp;Mao Ye","doi":"10.1002/qute.202400349","DOIUrl":"https://doi.org/10.1002/qute.202400349","url":null,"abstract":"<p>In recent years, rapid advances in non-Hermitian physics and PT-symmetry have brought new opportunities for ultra-sensitive sensing. Especially the presence of controllable non-conservative processes in optical and photonic systems has triggered the development of singularity-based sensing. By flexibly tuning gain, loss, and coupling strength, a series of high-resolution sensing approaches can be realized, with the potential of on-chip integration. Another important non-Hermitian singularity is the coherent perfect absorption-lasing (CPAL) point in the PT-broken phase, which manifests the coexistence of lasing and CPA, exhibiting intriguing properties with considerable sensing potential. As a crucial method for quantum sensing and metrology, the interaction between light and alkali-metal atomic ensembles promises unprecedented sensitivity in the measurement of ultra-weak magnetic field, inertia, and time. Therefore, extending the study of PT-symmetry and singularity-based sensing from conventional solid-state wave systems to diffusive systems such as atomic ensembles is attracting wide attention. In this review, the development of singularity-based sensing in PT/anti-PT symmetric non-Hermitian systems is summarized, with a special focus on photonic platforms including integration with waveguides, microcavities, metasurface, etc. In addition, sensing applications with discussion further extended to atomic ensembles, projecting future research trends in the field.</p>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"8 1","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143119729","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
Quantum Fourier Transformation Using Quantum Reservoir Computing Network 基于量子库计算网络的量子傅立叶变换
IF 4.4
Advanced quantum technologies Pub Date : 2024-11-14 DOI: 10.1002/qute.202400396
Lu-Fan Zhang, Lu Liu, Xing-yu Wu, Chuan Wang
{"title":"Quantum Fourier Transformation Using Quantum Reservoir Computing Network","authors":"Lu-Fan Zhang,&nbsp;Lu Liu,&nbsp;Xing-yu Wu,&nbsp;Chuan Wang","doi":"10.1002/qute.202400396","DOIUrl":"https://doi.org/10.1002/qute.202400396","url":null,"abstract":"<p>Combining the benefits of quantum computing and artificial neural networks, quantum reservoir computing shows potential for handling complex tasks due to its access to the Hilbert space in exponential dimensions. In this study, the quantum Fourier transform algorithm is implemented utilizing quantum reservoir computing, demonstrating its unique advantages. For the random interactions within the reservoirs, quantum reservoir computing avoids the cost of precise control of the physical system. The proposed model only requires to optimize a linear readout layer, thus significantly reducing the computational cost required for training. The accuracy of the implementation is numerically demonstrated and the model is integrated into quantum circuits to correctly execute the quantum phase estimation algorithm. Additionally, the impacts of different reservoir structures and dissipation intensities within the reservoir, and the results indicate the robustness of the model are discussed.</p>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"8 3","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143622650","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
Inside Front Cover: Nonlocality Enhanced Precision in Quantum Polarimetry via Entangled Photons (Adv. Quantum Technol. 11/2024) 封面内页：通过纠缠光子提高量子测偏仪的非局域精度（Adv.）
IF 4.4
Advanced quantum technologies Pub Date : 2024-11-14 DOI: 10.1002/qute.202470032
Ali Pedram, Vira R. Besaga, Frank Setzpfandt, Özgür E. Müstecaplıoğlu
{"title":"Inside Front Cover: Nonlocality Enhanced Precision in Quantum Polarimetry via Entangled Photons (Adv. Quantum Technol. 11/2024)","authors":"Ali Pedram,&nbsp;Vira R. Besaga,&nbsp;Frank Setzpfandt,&nbsp;Özgür E. Müstecaplıoğlu","doi":"10.1002/qute.202470032","DOIUrl":"https://doi.org/10.1002/qute.202470032","url":null,"abstract":"<p>A quantum polarimetry method using entangled photons to improve measurement precision is introduced in article number 2400059 by Ali Pedram, Vira R. Besaga, Frank Setzpfandt, and Özgür E. Müstecaplıoğlu. By calculating precision bounds and estimating the rotation angle of optical elements, both theoretically and experimentally, it is shown that the capability of entanglement to enhance accuracy is diminished with noise. Experimental noise induces bias in estimators, reducing accuracy and precision depending on chosen estimators and noise channels.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"7 11","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/qute.202470032","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142642061","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
Front Cover: Positional Accuracy of 3D Printed Quantum Emitter Fiber Couplers (Adv. Quantum Technol. 11/2024) 封面：三维打印量子发射器光纤耦合器的位置精度（Adv. Quantum Technol.）
IF 4.4
Advanced quantum technologies Pub Date : 2024-11-14 DOI: 10.1002/qute.202470031
Ksenia Weber, Simon Thiele, Mario Hentschel, Alois Herkommer, Harald Giessen
{"title":"Front Cover: Positional Accuracy of 3D Printed Quantum Emitter Fiber Couplers (Adv. Quantum Technol. 11/2024)","authors":"Ksenia Weber,&nbsp;Simon Thiele,&nbsp;Mario Hentschel,&nbsp;Alois Herkommer,&nbsp;Harald Giessen","doi":"10.1002/qute.202470031","DOIUrl":"https://doi.org/10.1002/qute.202470031","url":null,"abstract":"<p>The cover image depicts coupling of the light emission of single quantum emitters to single mode fibers. 3D printed microoptics are used to create the aspheric optics that matches the numerical apertures of light emission cone and fibers to each other. Additionally, a 3D printed chuck is used to place the fiber in the correct distance and with the correct horizontal alignment over the quantum emitters. The article by Harald Giessen and co-workers (article number 2400135) describes the quantification of the alignment accuracy and reproducibility of such 3D printed couplers. [Cover image: © Florian Sterl, Sterltech Optics.]\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"7 11","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/qute.202470031","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142642060","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
Back Cover: Analysis for Satellite-Based High-Dimensional Extended B92 and High-Dimensional BB84 Quantum Key Distribution (Adv. Quantum Technol. 11/2024) 封底：基于卫星的高维扩展 B92 和高维 BB84 量子密钥分发分析（Adv.）
IF 4.4
Advanced quantum technologies Pub Date : 2024-11-14 DOI: 10.1002/qute.202470033
Arindam Dutta,  Muskan, Subhashish Banerjee, Anirban Pathak
{"title":"Back Cover: Analysis for Satellite-Based High-Dimensional Extended B92 and High-Dimensional BB84 Quantum Key Distribution (Adv. Quantum Technol. 11/2024)","authors":"Arindam Dutta,&nbsp; Muskan,&nbsp;Subhashish Banerjee,&nbsp;Anirban Pathak","doi":"10.1002/qute.202470033","DOIUrl":"https://doi.org/10.1002/qute.202470033","url":null,"abstract":"<p>In article number 2400149, Arindam Dutta and co-workers study the implementation of high-dimensional quantum key distribution protocols, HD-Ext-B92 and HD-BB84, via satellite. The study modifies key rate calculations to explore variations in key rate, probability distribution, and quantum bit error rate (QBER) with respect to dimension and noise. The research examines how the average key rate changes with zenith angle and link length under different weather conditions, showing HD-BB84's superior performance in higher dimensions despite higher QBER saturation. The down-link configuration is shown to be preferable over the up-link configuration.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"7 11","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/qute.202470033","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142642062","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
Issue Information (Adv. Quantum Technol. 11/2024) 发行信息（Adv. Quantum Technol.）
IF 4.4
Advanced quantum technologies Pub Date : 2024-11-14 DOI: 10.1002/qute.202470034
{"title":"Issue Information (Adv. Quantum Technol. 11/2024)","authors":"","doi":"10.1002/qute.202470034","DOIUrl":"https://doi.org/10.1002/qute.202470034","url":null,"abstract":"","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"7 11","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/qute.202470034","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142642059","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
Mechanical Dynamics Around Higher-Order Exceptional Point in Magno-Optomechanics 磁光力学高阶异常点周围的力学动力学
IF 4.4
Advanced quantum technologies Pub Date : 2024-11-11 DOI: 10.1002/qute.202400275
Wen-Di He, Xiao-Hong Fan, Ming-Yue Liu, Guo-Qiang Zhang, Hai-Chao Li, Wei Xiong
{"title":"Mechanical Dynamics Around Higher-Order Exceptional Point in Magno-Optomechanics","authors":"Wen-Di He,&nbsp;Xiao-Hong Fan,&nbsp;Ming-Yue Liu,&nbsp;Guo-Qiang Zhang,&nbsp;Hai-Chao Li,&nbsp;Wei Xiong","doi":"10.1002/qute.202400275","DOIUrl":"https://doi.org/10.1002/qute.202400275","url":null,"abstract":"<p>Diverse exceptional points (EPs) are theoretically studied in an experimentally feasible magno-optomechanics consisting of an optomechanical subsystem coupled to a magnomechanical subsystem via physically direct contact. By adiabatically eliminating both the cavity and the Kittel mode, dissipative and parity-time symmetric exceptional points can be observed. When only the cavity mode is eliminated, a second (third)-order pseudo-Hermitian EP emerges for nondegenerate (degenerate) mechanical modes. The distinct dynamical behavior of two mechanical modes around these EPs are further studied. The proposal provides a promising way to engineer diverse EPs and quantify non-Hermitian phase transition with exceptional dynamical behavior in magno-optomechanics.</p>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"8 3","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143622612","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
Multidimensional Quantum Generative Modeling by Quantum Hartley Transform 基于量子Hartley变换的多维量子生成建模
IF 4.4
Advanced quantum technologies Pub Date : 2024-11-11 DOI: 10.1002/qute.202400337
Hsin-Yu Wu, Vincent E. Elfving, Oleksandr Kyriienko
{"title":"Multidimensional Quantum Generative Modeling by Quantum Hartley Transform","authors":"Hsin-Yu Wu,&nbsp;Vincent E. Elfving,&nbsp;Oleksandr Kyriienko","doi":"10.1002/qute.202400337","DOIUrl":"https://doi.org/10.1002/qute.202400337","url":null,"abstract":"<p>An approach for building quantum models based on the exponentially growing orthonormal basis of Hartley kernel functions is developed. First, a differentiable Hartley feature map parameterized by real-valued argument that enables quantum models suitable for solving stochastic differential equations and regression problems is designed. Unlike the naturally complex Fourier encoding, the proposed Hartley feature map circuit leads to quantum states with real-valued amplitudes, introducing an inductive bias and natural regularization. Next, a quantum Hartley transform circuit is proposed as a map between computational and Hartley basis. The developed paradigm is applied to generative modeling from solutions of stochastic differential equations, and utilize the quantum Hartley transform for fine sampling from parameterized distributions through an extended register. Finally, the capability of multivariate quantum generative modeling is demonstrated for both correlated and uncorrelated distributions. As a result, the developed quantum Hartley-based generative models (QHGMs) offer a distinct quantum approach to generative AI at increasing scale.</p>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"8 3","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/qute.202400337","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143622656","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
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