Advanced quantum technologies最新文献

Exponentially Enhanced Magnetic-Field Sensing and Perfect Noise Suppression in Cavity Magnonics 腔磁学中指数增强的磁场传感和完美的噪声抑制

IF 4.3

Advanced quantum technologies Pub Date : 2026-04-01 Epub Date: 2025-12-04 DOI: 10.1002/qute.202500608

Nan Wang, Shi-Yan Li, Xiao-Fei Ou, Wei-Yue Zhang, Ai-Dong Zhu, Lin Yu

{"title":"Exponentially Enhanced Magnetic-Field Sensing and Perfect Noise Suppression in Cavity Magnonics","authors":"Nan Wang, Shi-Yan Li, Xiao-Fei Ou, Wei-Yue Zhang, Ai-Dong Zhu, Lin Yu","doi":"10.1002/qute.202500608","DOIUrl":"https://doi.org/10.1002/qute.202500608","url":null,"abstract":"<div>\u0000 \u0000 <p>We propose a scheme to achieve exponential amplification of weak magnetic-field signals and significant suppression of additional noise in a cavity magnonics. By introducing a two-photon pump field and constructing single-quadrature coupling between modes in the squeezed representation, a significant enhancement of the signal response based on quantum nondemolition measurement can be achieved. Fine-tuning the squeezing parameters of the pump field enables the realization of high signal response under both strong and weak cavity-magnon coupling regimes, thereby enhancing the controllability of the sensor. In addition, by introducing an auxiliary broadband squeezed source, the additional noise can be suppressed far below the standard quantum limit (SQL) through quantum destructive interference between the two noise fields, thereby significantly enhancing the sensor's performance. This scheme, combining exponential signal amplification with significant noise suppression, offers a powerful platform for the development of quantum sensors and advances in quantum precision measurements.</p>\u0000 </div>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"9 4","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147683194","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

Impact of Atmospheric Turbulence on Spatial Mode Mismatch Attacks in Free-Space QKD Implementation 自由空间QKD实现中大气湍流对空间模式失配攻击的影响

IF 4.3

Advanced quantum technologies Pub Date : 2026-04-01 Epub Date: 2025-12-30 DOI: 10.1002/qute.202500460

Rachita Nandan, Tanya Sharma, R. P. Singh, Shashi Prabhakar

{"title":"Impact of Atmospheric Turbulence on Spatial Mode Mismatch Attacks in Free-Space QKD Implementation","authors":"Rachita Nandan, Tanya Sharma, R. P. Singh, Shashi Prabhakar","doi":"10.1002/qute.202500460","DOIUrl":"10.1002/qute.202500460","url":null,"abstract":"<div>\u0000 \u0000 <p>In free-space quantum key distribution (QKD), atmospheric turbulence affects quantum signals by causing intensity fluctuations, phase distortions, and beam wander, which may be exploited by an eavesdropper. Accurate characterization of the quantum channel and receiver is, therefore, essential. Detector efficiency mismatch has previously been identified as a possible side-channel vulnerability. This study examines the impact of atmospheric turbulence on the security of a BB84 QKD receiver under a spatial-mode mismatch attack. Turbulence is emulated in the laboratory using phase screens implemented on a spatial light modulator. Results show that turbulence exacerbates inherent detection probability mismatches, increasing the receiver's vulnerability. Information leakage to an eavesdropper is characterized and quantified based on both detection mismatches and turbulence strengths. A comparative analysis between Gaussian and Laguerre-Gaussian (LG) modes shows that LG modes, particularly those of higher order, exhibit enhanced resilience against turbulence-induced information leakage. These findings highlight the importance of receiver characterization and spatial mode selection for the secure implementation of QKD in long-distance and satellite-based systems under realistic atmospheric conditions.</p>\u0000 </div>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"9 4","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147684252","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

Corner States in C6 Symmetric Photonic Crystals: Origins and Properties C6对称光子晶体的角态：起源与性质

IF 4.3

Advanced quantum technologies Pub Date : 2026-04-01 Epub Date: 2025-12-10 DOI: 10.1002/qute.202500836

Yongxi Yao, Zirui Zhang, Hongfang Zhang, Qiang Shi, Bing Yang

{"title":"Corner States in C6 Symmetric Photonic Crystals: Origins and Properties","authors":"Yongxi Yao, Zirui Zhang, Hongfang Zhang, Qiang Shi, Bing Yang","doi":"10.1002/qute.202500836","DOIUrl":"10.1002/qute.202500836","url":null,"abstract":"<div>\u0000 \u0000 <p>Based on 2D C₆ symmetric photonic crystals (PCs), different photonic finite structures possessing overall C<sub>6</sub>, C<sub>3</sub>, and C<sub>2</sub> symmetries are designed. By implementing Perfect Electric Conductor (PEC) boundary, several typical corner configurations with angles 2π/3, π/3, 4π/3, and 5π/3 are constructed, and the corresponding CSs are detailedly investigated. With help of filling anomaly analysis, local density of states (LDOS) calculation and eigenmode simulation, the frequency distribution, field localization, fractional corner charge, topological origin and robustness of these CSs are demonstrated. These results reveal that in 2D PCs finite structures, the corner charges at corners with conjugate angles <i>θ</i> and 2π-<i>θ</i> fundamentally have deterministic relationship (<i>Q<sub>θ</sub></i>+<i>Q<sub>2π</sub></i><sub>-</sub><i><sub>θ</sub></i> = 0 mod 1), and CSs can exist even at corners without fractional corner charge which is different from cases in acoustic, mechanical, optical waveguide, and other resonator systems. Especially, at corners with large angles, such as at angle 4π/3, topological CSs with nonzero fractional corner charge are also susceptive to the defects adjacent to the corner cells. These results reveal topological origins and properties of CSs in PCs systems, and provide insights for designing higher-order CSs and photonic micro-nano devices based on PCs. Furthermore, these methodologies can also be extended to other 2D and 3D PCs systems and photonic metamaterial platforms.</p>\u0000 </div>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"9 4","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147683640","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

Exponentially Enhanced Magnetic-Field Sensing and Perfect Noise Suppression in Cavity Magnonics 腔磁学中指数增强的磁场传感和完美的噪声抑制

IF 4.3

Advanced quantum technologies Pub Date : 2026-04-01 Epub Date: 2025-12-04 DOI: 10.1002/qute.202500608

Nan Wang, Shi-Yan Li, Xiao-Fei Ou, Wei-Yue Zhang, Ai-Dong Zhu, Lin Yu

{"title":"Exponentially Enhanced Magnetic-Field Sensing and Perfect Noise Suppression in Cavity Magnonics","authors":"Nan Wang, Shi-Yan Li, Xiao-Fei Ou, Wei-Yue Zhang, Ai-Dong Zhu, Lin Yu","doi":"10.1002/qute.202500608","DOIUrl":"10.1002/qute.202500608","url":null,"abstract":"<div>\u0000 \u0000 <p>We propose a scheme to achieve exponential amplification of weak magnetic-field signals and significant suppression of additional noise in a cavity magnonics. By introducing a two-photon pump field and constructing single-quadrature coupling between modes in the squeezed representation, a significant enhancement of the signal response based on quantum nondemolition measurement can be achieved. Fine-tuning the squeezing parameters of the pump field enables the realization of high signal response under both strong and weak cavity-magnon coupling regimes, thereby enhancing the controllability of the sensor. In addition, by introducing an auxiliary broadband squeezed source, the additional noise can be suppressed far below the standard quantum limit (SQL) through quantum destructive interference between the two noise fields, thereby significantly enhancing the sensor's performance. This scheme, combining exponential signal amplification with significant noise suppression, offers a powerful platform for the development of quantum sensors and advances in quantum precision measurements.</p>\u0000 </div>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"9 4","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147683193","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

Gold Nanorod Dimer Enhanced Bright and Polarized Single Photons Coupled to Optical Nanowire 金纳米棒二聚体增强光纳米线上的亮偏振单光子

IF 4.3

Advanced quantum technologies Pub Date : 2026-04-01 Epub Date: 2025-11-26 DOI: 10.1002/qute.202500518

Subrat Sahu, Kali P. Nayak, Rajan Jha

引用次数: 0

QSEA: Quantum Self-Supervised Learning with Entanglement Augmentation 量子自监督学习与纠缠增强

IF 4.3

Advanced quantum technologies Pub Date : 2026-04-01 Epub Date: 2025-11-28 DOI: 10.1002/qute.202500530

LingXiao Li, XiaoHui Ni, Jing Li, SuJuan Qin, Fei Gao

{"title":"QSEA: Quantum Self-Supervised Learning with Entanglement Augmentation","authors":"LingXiao Li, XiaoHui Ni, Jing Li, SuJuan Qin, Fei Gao","doi":"10.1002/qute.202500530","DOIUrl":"https://doi.org/10.1002/qute.202500530","url":null,"abstract":"<div>\u0000 \u0000 <p>As an unsupervised feature representation paradigm, Self-Supervised Learning (SSL) uses the intrinsic structure of data to extract meaningful features without relying on manual annotation. Despite the success of SSL, there are still problems, such as limited model capacity or insufficient representation ability. Quantum SSL has become a promising alternative because it can exploit quantum states to enhance expression ability and learning efficiency. This letter proposes a Quantum SSL with entanglement augmentation method (QSEA). Different from existing Quantum SSLs, QSEA introduces an entanglement-based sample generation scheme and a fidelity-driven quantum loss function. Specifically, QSEA constructs augmented samples by entangling an auxiliary qubit with the raw state and applying parameterized unitary transformations. The loss function is defined using quantum fidelity, quantifying similarity between quantum representations and effectively capturing sample relations. Experimental results show that QSEA outperforms existing quantum self-supervised methods on multiple benchmarks and shows stronger stability in decorrelation noise environments. This framework lays the theoretical and practical foundation for quantum learning systems and advances the development of quantum machine learning in SSL.</p>\u0000 </div>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"9 4","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147684213","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 Weak Force Sensor with Cross-Kerr Nonlinearity and Parametric Amplification 交叉克尔非线性和参数放大的量子弱力传感器

IF 4.3

Advanced quantum technologies Pub Date : 2026-04-01 Epub Date: 2025-12-09 DOI: 10.1002/qute.202500793

Ying-Jian Zhu, Xue Han, Hong-Fu Wang, Shou Zhang

{"title":"Quantum Weak Force Sensor with Cross-Kerr Nonlinearity and Parametric Amplification","authors":"Ying-Jian Zhu, Xue Han, Hong-Fu Wang, Shou Zhang","doi":"10.1002/qute.202500793","DOIUrl":"10.1002/qute.202500793","url":null,"abstract":"<div>\u0000 \u0000 <p>The sensitivity of optomechanical sensors is fundamentally constrained by the combined effects of shot noise and quantum back-action. Here we show that the joint action of cross-Kerr nonlinearity and an optical parametric amplifier (OPA) can effectively suppress these noises. By tailoring the cross-Kerr strength, the force-sensing sensitivity can surpass the standard quantum limit (SQL), while an optimal driving power broadens the detection bandwidth. We further find that the system becomes unstable when the detuning falls below <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mn>3.82</mn>\u0000 <mi>κ</mi>\u0000 </mrow>\u0000 <annotation>$3.82kappa$</annotation>\u0000 </semantics></math>. Importantly, the inclusion of an OPA enhances robustness against thermal fluctuations, allowing the sensitivity of force measurement to surpass the SQL even at temperatures up to 300 K. A detailed noise analysis reveals that cross-Kerr nonlinearity predominantly suppresses back-action noise, whereas the OPA provides a strong reduction of shot noise. These results establish a promising hybrid strategy for realizing optomechanical sensors that combine high sensitivity with thermal resilience, with broad applications ranging from medical diagnostics to gravitational-wave astronomy.</p>\u0000 </div>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"9 4","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147683434","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

Corner States in C6 Symmetric Photonic Crystals: Origins and Properties C6对称光子晶体的角态：起源与性质

IF 4.3

Advanced quantum technologies Pub Date : 2026-04-01 Epub Date: 2025-12-10 DOI: 10.1002/qute.202500836

Yongxi Yao, Zirui Zhang, Hongfang Zhang, Qiang Shi, Bing Yang

{"title":"Corner States in C6 Symmetric Photonic Crystals: Origins and Properties","authors":"Yongxi Yao, Zirui Zhang, Hongfang Zhang, Qiang Shi, Bing Yang","doi":"10.1002/qute.202500836","DOIUrl":"https://doi.org/10.1002/qute.202500836","url":null,"abstract":"<div>\u0000 \u0000 <p>Based on 2D C₆ symmetric photonic crystals (PCs), different photonic finite structures possessing overall C<sub>6</sub>, C<sub>3</sub>, and C<sub>2</sub> symmetries are designed. By implementing Perfect Electric Conductor (PEC) boundary, several typical corner configurations with angles 2π/3, π/3, 4π/3, and 5π/3 are constructed, and the corresponding CSs are detailedly investigated. With help of filling anomaly analysis, local density of states (LDOS) calculation and eigenmode simulation, the frequency distribution, field localization, fractional corner charge, topological origin and robustness of these CSs are demonstrated. These results reveal that in 2D PCs finite structures, the corner charges at corners with conjugate angles <i>θ</i> and 2π-<i>θ</i> fundamentally have deterministic relationship (<i>Q<sub>θ</sub></i>+<i>Q<sub>2π</sub></i><sub>-</sub><i><sub>θ</sub></i> = 0 mod 1), and CSs can exist even at corners without fractional corner charge which is different from cases in acoustic, mechanical, optical waveguide, and other resonator systems. Especially, at corners with large angles, such as at angle 4π/3, topological CSs with nonzero fractional corner charge are also susceptive to the defects adjacent to the corner cells. These results reveal topological origins and properties of CSs in PCs systems, and provide insights for designing higher-order CSs and photonic micro-nano devices based on PCs. Furthermore, these methodologies can also be extended to other 2D and 3D PCs systems and photonic metamaterial platforms.</p>\u0000 </div>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"9 4","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147683682","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

QSEA: Quantum Self-Supervised Learning with Entanglement Augmentation 量子自监督学习与纠缠增强

IF 4.3

Advanced quantum technologies Pub Date : 2026-04-01 Epub Date: 2025-11-28 DOI: 10.1002/qute.202500530

LingXiao Li, XiaoHui Ni, Jing Li, SuJuan Qin, Fei Gao

{"title":"QSEA: Quantum Self-Supervised Learning with Entanglement Augmentation","authors":"LingXiao Li, XiaoHui Ni, Jing Li, SuJuan Qin, Fei Gao","doi":"10.1002/qute.202500530","DOIUrl":"https://doi.org/10.1002/qute.202500530","url":null,"abstract":"<div>\u0000 \u0000 <p>As an unsupervised feature representation paradigm, Self-Supervised Learning (SSL) uses the intrinsic structure of data to extract meaningful features without relying on manual annotation. Despite the success of SSL, there are still problems, such as limited model capacity or insufficient representation ability. Quantum SSL has become a promising alternative because it can exploit quantum states to enhance expression ability and learning efficiency. This letter proposes a Quantum SSL with entanglement augmentation method (QSEA). Different from existing Quantum SSLs, QSEA introduces an entanglement-based sample generation scheme and a fidelity-driven quantum loss function. Specifically, QSEA constructs augmented samples by entangling an auxiliary qubit with the raw state and applying parameterized unitary transformations. The loss function is defined using quantum fidelity, quantifying similarity between quantum representations and effectively capturing sample relations. Experimental results show that QSEA outperforms existing quantum self-supervised methods on multiple benchmarks and shows stronger stability in decorrelation noise environments. This framework lays the theoretical and practical foundation for quantum learning systems and advances the development of quantum machine learning in SSL.</p>\u0000 </div>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"9 4","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147684244","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

Gold Nanorod Dimer Enhanced Bright and Polarized Single Photons Coupled to Optical Nanowire 金纳米棒二聚体增强光纳米线上的亮偏振单光子

IF 4.3

Advanced quantum technologies Pub Date : 2026-04-01 Epub Date: 2025-11-26 DOI: 10.1002/qute.202500518

Subrat Sahu, Kali P. Nayak, Rajan Jha

引用次数: 0