Advanced quantum technologies最新文献

{"title":"Concurrent Measurement of Photon Shot Noise and Spin-Projection Noise via Spatial Light Modulation in an Operating Atomic Magnetometer","authors":"Zeyu Hua,&nbsp;Xinxin He,&nbsp;Haifeng Dong,&nbsp;Chenlu Xu,&nbsp;Yangning Dai,&nbsp;Ling Ding,&nbsp;Jiuyan Wei,&nbsp;Doudou Zheng,&nbsp;Xin Li,&nbsp;Zhonghao Li,&nbsp;Huanfei Wen,&nbsp;Hao Guo,&nbsp;Jun Tang,&nbsp;Zongmin Ma,&nbsp;Jun Liu","doi":"10.1002/qute.70411","DOIUrl":"https://doi.org/10.1002/qute.70411","url":null,"abstract":"<div>\u0000 \u0000 <p>We propose a method for simultaneously measuring photon shot noise (PSN), spin projection noise (SPN), and technical noise in an atomic magnetometer using a spatial light modulator. A digital micromirror device (DMD) is placed behind the cell to modulate the area of the probe beam, thereby enabling the detected optical power and the number of polarized atoms to be varied while keeping the light intensity inside the cell constant—thus avoiding additional perturbations. Based on this experimental approach, we adapt the conventional models and fit the total equivalent magnetic-field noise power spectral density as a function of the modulation area to obtain the key model parameters. Using the effective transverse relaxation time <i>T</i>₂ extracted from the free-induction-decay (FID) signal, the three noise components are then separated. The method is validated on a Bell-Bloom magnetometer operated with a bias magnetic field of 2–3 µT. The results show that our model can simultaneously measure PSN, SPN, and technical noise with high accuracy, and outperforms conventional methods in terms of fitting robustness and goodness of fit. This work provides a practical approach for quantum-noise diagnostics in operating atomic magnetometers without requiring ideal conditions such as weak perturbations or low technical noise.</p>\u0000 </div>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"9 8","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148849169","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}

{"title":"Concurrent Measurement of Photon Shot Noise and Spin-Projection Noise via Spatial Light Modulation in an Operating Atomic Magnetometer","authors":"Zeyu Hua,&nbsp;Xinxin He,&nbsp;Haifeng Dong,&nbsp;Chenlu Xu,&nbsp;Yangning Dai,&nbsp;Ling Ding,&nbsp;Jiuyan Wei,&nbsp;Doudou Zheng,&nbsp;Xin Li,&nbsp;Zhonghao Li,&nbsp;Huanfei Wen,&nbsp;Hao Guo,&nbsp;Jun Tang,&nbsp;Zongmin Ma,&nbsp;Jun Liu","doi":"10.1002/qute.70411","DOIUrl":"https://doi.org/10.1002/qute.70411","url":null,"abstract":"<div>\u0000 \u0000 <p>We propose a method for simultaneously measuring photon shot noise (PSN), spin projection noise (SPN), and technical noise in an atomic magnetometer using a spatial light modulator. A digital micromirror device (DMD) is placed behind the cell to modulate the area of the probe beam, thereby enabling the detected optical power and the number of polarized atoms to be varied while keeping the light intensity inside the cell constant—thus avoiding additional perturbations. Based on this experimental approach, we adapt the conventional models and fit the total equivalent magnetic-field noise power spectral density as a function of the modulation area to obtain the key model parameters. Using the effective transverse relaxation time <i>T</i>₂ extracted from the free-induction-decay (FID) signal, the three noise components are then separated. The method is validated on a Bell-Bloom magnetometer operated with a bias magnetic field of 2–3 µT. The results show that our model can simultaneously measure PSN, SPN, and technical noise with high accuracy, and outperforms conventional methods in terms of fitting robustness and goodness of fit. This work provides a practical approach for quantum-noise diagnostics in operating atomic magnetometers without requiring ideal conditions such as weak perturbations or low technical noise.</p>\u0000 </div>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"9 8","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148849168","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}

{"title":"Hydrogen-Functionalized Two-Dimensional H-Phase Janus TiXYH (X = Cl, Br; Y = P, As): Valley Electronics and Multiple Magnetic States","authors":"Mingyu Lü,&nbsp;Yuping Tian,&nbsp;Chaobo Wang,&nbsp;Lian-Lian Zhang,&nbsp;Xuefeng Dai,&nbsp;Xiangru Kong,&nbsp;Wei-Jiang Gong","doi":"10.1002/qute.70408","DOIUrl":"https://doi.org/10.1002/qute.70408","url":null,"abstract":"<div>\u0000 \u0000 <p>Integrating spin, valley, and topology in a single tunable 2D platform is highly desirable for multifunctional quantum technologies. Here, we identify Janus TiXYH (X = Cl, Br; Y = P, As) as a versatile quantum-material family in which these degrees of freedom are strongly coupled from the monolayer to the bilayer limit. In the monolayer form, polar TiXYH is an intrinsic ferromagnetic semiconductor with sizable valley polarization and finite Berry curvature, giving rise to an anomalous valley Hall response. More importantly, strain effectively reshapes the band topology and drives a transition toward a quantum anomalous Hall state, enabling topology-assisted control of valley physics. In bilayers, interlayer sliding introduces switchable ferroelectric polarization and reconfigures the Berry-curvature distribution, resulting in an electrically reversible layer-polarized anomalous Hall effect with tunable valley polarization. The Hall response can therefore be switched by reversing the ferroelectric polarization. Moreover, interlayer coupling stabilizes antiferromagnetic ordering, while twisting the bilayer induces a staggered magnetic configuration with altermagnetic characteristics. These results establish Janus TiXYH as a programmable 2D platform for strain-, electric-field-, and stacking-controlled topological and valley quantum functionalities.</p>\u0000 </div>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"9 8","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148783939","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}

{"title":"Quantum-Classical Physics-Informed Neural Networks for Permeability Inversion in Single-Phase Reservoir Flow","authors":"Xiang Rao,&nbsp;Xi Ouyang,&nbsp;Yina Liu","doi":"10.1002/qute.70409","DOIUrl":"https://doi.org/10.1002/qute.70409","url":null,"abstract":"<div>\u0000 \u0000 <p>This work develops a Quantum-Classical Physics-Informed Neural Network (QCPINN) integrating quantum computing and physical constraints for single-phase reservoir permeability inversion. The hybrid framework contains classical pre/post-processing modules and an Alternate-topology quantum core, which encodes spatial features through angle embedding and optimizes all hybrid parameters using a composite loss combining measurement, PDE residual and boundary condition losses. Two steady seepage examples compare QCPINN and classical PINN with nearly identical trainable parameters. For linear permeability, QCPINN achieves mean relative errors of 0.50% for permeability and 0.04% for pressure, converging faster with more uniform errors; 4 qubits and one layer provide optimal circuit performance. For strongly nonlinear exponential permeability, the permeability mean relative error rises to 5.02%, while pressure error stays below 0.42%. Although isolated low-permeability grids show a peak relative error of 48.13%, 78.68% of grids have errors under 5%. QCPINN takes advantage of quantum high-dimensional approximation and parallelism to outperform PINN in convergence and precision, delivering balanced accuracy and efficiency for heterogeneous reservoir permeability inversion.</p>\u0000 </div>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"9 8","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148783937","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}

{"title":"Hydrogen-Functionalized Two-Dimensional H-Phase Janus TiXYH (X = Cl, Br; Y = P, As): Valley Electronics and Multiple Magnetic States","authors":"Mingyu Lü,&nbsp;Yuping Tian,&nbsp;Chaobo Wang,&nbsp;Lian-Lian Zhang,&nbsp;Xuefeng Dai,&nbsp;Xiangru Kong,&nbsp;Wei-Jiang Gong","doi":"10.1002/qute.70408","DOIUrl":"https://doi.org/10.1002/qute.70408","url":null,"abstract":"<div>\u0000 \u0000 <p>Integrating spin, valley, and topology in a single tunable 2D platform is highly desirable for multifunctional quantum technologies. Here, we identify Janus TiXYH (X = Cl, Br; Y = P, As) as a versatile quantum-material family in which these degrees of freedom are strongly coupled from the monolayer to the bilayer limit. In the monolayer form, polar TiXYH is an intrinsic ferromagnetic semiconductor with sizable valley polarization and finite Berry curvature, giving rise to an anomalous valley Hall response. More importantly, strain effectively reshapes the band topology and drives a transition toward a quantum anomalous Hall state, enabling topology-assisted control of valley physics. In bilayers, interlayer sliding introduces switchable ferroelectric polarization and reconfigures the Berry-curvature distribution, resulting in an electrically reversible layer-polarized anomalous Hall effect with tunable valley polarization. The Hall response can therefore be switched by reversing the ferroelectric polarization. Moreover, interlayer coupling stabilizes antiferromagnetic ordering, while twisting the bilayer induces a staggered magnetic configuration with altermagnetic characteristics. These results establish Janus TiXYH as a programmable 2D platform for strain-, electric-field-, and stacking-controlled topological and valley quantum functionalities.</p>\u0000 </div>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"9 8","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148783938","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}

{"title":"Quantum-Classical Physics-Informed Neural Networks for Permeability Inversion in Single-Phase Reservoir Flow","authors":"Xiang Rao,&nbsp;Xi Ouyang,&nbsp;Yina Liu","doi":"10.1002/qute.70409","DOIUrl":"https://doi.org/10.1002/qute.70409","url":null,"abstract":"<div>\u0000 \u0000 <p>This work develops a Quantum-Classical Physics-Informed Neural Network (QCPINN) integrating quantum computing and physical constraints for single-phase reservoir permeability inversion. The hybrid framework contains classical pre/post-processing modules and an Alternate-topology quantum core, which encodes spatial features through angle embedding and optimizes all hybrid parameters using a composite loss combining measurement, PDE residual and boundary condition losses. Two steady seepage examples compare QCPINN and classical PINN with nearly identical trainable parameters. For linear permeability, QCPINN achieves mean relative errors of 0.50% for permeability and 0.04% for pressure, converging faster with more uniform errors; 4 qubits and one layer provide optimal circuit performance. For strongly nonlinear exponential permeability, the permeability mean relative error rises to 5.02%, while pressure error stays below 0.42%. Although isolated low-permeability grids show a peak relative error of 48.13%, 78.68% of grids have errors under 5%. QCPINN takes advantage of quantum high-dimensional approximation and parallelism to outperform PINN in convergence and precision, delivering balanced accuracy and efficiency for heterogeneous reservoir permeability inversion.</p>\u0000 </div>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"9 8","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148783940","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}

{"title":"Nonlinear Enhancement in Hybrid Optomagnonic Systems","authors":"Jin Yang,&nbsp;Bingyu Yang,&nbsp;Biao Xiong,&nbsp;Xiaojuan Wang,&nbsp;Jibing Liu","doi":"10.1002/qute.70391","DOIUrl":"https://doi.org/10.1002/qute.70391","url":null,"abstract":"<div>\u0000 \u0000 <p>Photon blockade is a key quantum effect for generating single-photon sources essential to quantum information processing. Compared with unconventional photon blockade, the conventional counterpart provides higher single-photon generation efficiency but typically demands strong nonlinearity, which severely restricts experimental feasibility. Here, a nonlinear enhancement scheme based on a hybrid optomagnonic system is proposed. The central idea is to exploit an additional tripartite interaction among the TE mode, TM mode, and magnon that, under strong driving, induces two-mode squeezing. Via a squeezing transformation, the effective magnon–photon coupling is exponentially enhanced, giving rise to a strong effective Kerr nonlinearity and thus an increased energy-level detuning. Using both analytical calculations and numerical simulations of the second-order correlation function, it is shown that the conventional photon blockade is substantially enhanced. Compared with the pure optomagnonic scheme induced by the Faraday effect, the proposed approach reduces the second-order correlation function by more than an order of magnitude and dramatically broadens the blockade parameter window. Moreover, photon blockade is achieved even when the intrinsic coupling strength is much smaller than the cavity decay rate. These results suggest a feasible route toward high-efficiency conventional photon blockade without strong intrinsic nonlinearities, potentially facilitating on-chip single-photon sources for scalable quantum information processing.</p>\u0000 </div>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"9 8","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148753771","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}

{"title":"Visibility-Engineered Multiparameter Sensing in Dispersive Quantum Interferometry: Identifiability, Noise Robustness, and Hardware Emulation","authors":"Lucas Ferreira R. de Moura,&nbsp;Daniel Y. Akamatsu,&nbsp;G. D. de Moraes Neto,&nbsp;Norton G. de Almeida","doi":"10.1002/qute.70401","DOIUrl":"https://doi.org/10.1002/qute.70401","url":null,"abstract":"<div>\u0000 \u0000 <p>We propose a dispersive interferometric protocol for simultaneously estimating the dimensionless inverse temperature <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>b</mi>\u0000 <mo>=</mo>\u0000 <mi>β</mi>\u0000 <mi>ℏ</mi>\u0000 <msub>\u0000 <mi>ω</mi>\u0000 <mn>0</mn>\u0000 </msub>\u0000 </mrow>\u0000 <annotation>$b=beta hbar omega _0$</annotation>\u0000 </semantics></math> of a thermal two-level ancilla and the dispersive phase <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>x</mi>\u0000 <mo>=</mo>\u0000 <mi>χ</mi>\u0000 <mi>t</mi>\u0000 <mo>/</mo>\u0000 <mn>2</mn>\u0000 </mrow>\u0000 <annotation>$x=chi t/2$</annotation>\u0000 </semantics></math>. Photon counting at the interferometer output yields probabilities governed by the fringe visibility <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>V</mi>\u0000 <mo>(</mo>\u0000 <mi>b</mi>\u0000 <mo>)</mo>\u0000 </mrow>\u0000 <annotation>$mathcal {V}(b)$</annotation>\u0000 </semantics></math>; its magnitude controls phase sensitivity, while its derivative sets thermometric sensitivity. A single binary outcome provides only a rank-one Fisher matrix, so local identifiability requires combining several controlled reference phases. We build a multi-setting likelihood and numerically demonstrate that a maximum-likelihood estimator attains the Cramér–Rao bound asymptotically. For <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>N</mi>\u0000 <mo>=</mo>\u0000 <mn>1</mn>\u0000 </mrow>\u0000 <annotation>$N=1$</annotation>\u0000 </semantics></math> we implement the equivalent qubit circuit on IBM Quantum hardware, interpreting the data as a conservative likelihood emulation; the observed contrast shrinkage is consistent with a noise bias toward infinite temperature. We also compare NOON, cat, and squeezed probe states under amplitude and phase damping, highlighting windows of usable joint sensitivity. The framework clarifies what can be inferred from photon counting statistics and which control settings are necessary for genuine multiparameter estimation in realistic platforms.</p>\u0000 </div>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"9 8","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148753769","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}

{"title":"Fast Charging of Lipkin–Meshkov–Glick Quantum Battery","authors":"Cheng-Jie Wang,&nbsp;Yuan-Jin Wang,&nbsp;Fu-Quan Dou","doi":"10.1002/qute.70405","DOIUrl":"https://doi.org/10.1002/qute.70405","url":null,"abstract":"<div>\u0000 \u0000 <p>Fast charging is a pivotal and fundamental performance metric in quantum battery (QB) research. Here, we investigate the fast-charging performance of the Lipkin–Meshkov–Glick QB based on shortcuts to adiabaticity (STA). We mainly consider a scenario where the coupling strength between arbitrary two sites in the QB varies sinusoidally over time. We demonstrate that the STA protocol can remarkably enhance the charging efficiency. During the charging cycle, STA drives the periodic evolution of stored energy, coherence relative entropy, and energy fluctuations, and effectively suppresses energy fluctuation magnitude. We reveal that quantum coherence serves as a crucial quantum resource for boosting the charging efficiency of a QB. We analyze the influences of the anisotropy parameter, driving field amplitude and frequency, as well as particle number on the overall battery performance and show that efficient charging and prominent charging advantages can be realized by modulating these physical parameters. We further evaluate the energy cost throughout the charging process, and confirm that the maximum energy cost per particle can be reduced via appropriate tuning of driving field parameters. Our results offer valuable insights into the optimal design and practical implementation of high-efficiency fast-charging QB.</p>\u0000 </div>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"9 8","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148753770","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}

{"title":"Heralded Entangled State Generation Enhanced by Photon Addition and Subtraction","authors":"Yun-Long Cao,&nbsp;Xiao-Ye Xu,&nbsp;Chuan-Feng Li,&nbsp;Guang-Can Guo","doi":"10.1002/qute.70396","DOIUrl":"https://doi.org/10.1002/qute.70396","url":null,"abstract":"<div>\u0000 \u0000 <p>Heralded photonic state engineering has become a promising approach for generating non-Gaussian quantum resources using experimentally accessible Gaussian operations and conditional measurements. Existing Gaussian state engineering methods mainly target continuous-variable non-classical states, whereas the systematic generation of heralded multipartite entangled states remains largely unexplored. In this work, a Gaussian state engineering framework enhanced by photon addition and subtraction for heralded generation of entangled states is developed. By combining single-mode squeezing, linear interferometers, and conditional photon-number measurements on ancillary modes, the model probabilistically generates dual-rail encoded Bell, GHZ, and W states. Squeezing parameters and interferometer settings are systematically optimized to maximize both heralding success probability and fidelity with target states. Results demonstrate that photon addition and subtraction significantly enhance output state non-classicality and improve generation performance while maintaining computational efficiency comparable to single-photon source models. Further analysis of the scheme's robustness under parameter perturbations indicates that performance remains stable under realistic experimental imperfections. This work provides a versatile and experimentally feasible framework for scalable heralded entanglement generation using Gaussian resources with non-Gaussian operations.</p>\u0000 </div>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"9 8","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148753772","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}