Denis A. Ikonnikov, Erdeny C. Darmaev, Sergey A. Myslivets, Konstantin N. Pichugin, Vasily G. Arkhipkin, Andrey M. Vyunishev
{"title":"Four Bundle Optical Singularities Spatial Evolution","authors":"Denis A. Ikonnikov, Erdeny C. Darmaev, Sergey A. Myslivets, Konstantin N. Pichugin, Vasily G. Arkhipkin, Andrey M. Vyunishev","doi":"10.1002/andp.202500080","DOIUrl":"https://doi.org/10.1002/andp.202500080","url":null,"abstract":"<p>Complex optical vortex bundles produced by dislocations arranged in accordance with the group of symmetry <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <msub>\u0000 <mi>D</mi>\u0000 <mn>1</mn>\u0000 </msub>\u0000 <mo>,</mo>\u0000 <msub>\u0000 <mi>D</mi>\u0000 <mn>2</mn>\u0000 </msub>\u0000 <mo>,</mo>\u0000 <msub>\u0000 <mi>C</mi>\u0000 <mn>4</mn>\u0000 </msub>\u0000 </mrow>\u0000 <annotation>$D_1, D_2, C_4$</annotation>\u0000 </semantics></math> are studied theoretically and experimentally. The spatial evolution of optical vortices is investigated for three types of spatial configurations based on the signs of dislocation topological charges. Theoretical predictions derived from the Fresnel diffraction integral and the hydrodynamic approach have been found to be consistent with each other and are in a good agreement with the experimental results. For all cases, the symmetry properties of the dislocation arrangement are shown to be imposed to optical vortex bundles produced. The observed dynamics provides new insights into the behavior of singularities in complex optical fields.</p>","PeriodicalId":7896,"journal":{"name":"Annalen der Physik","volume":"537 8","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144809299","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Zero-Field Hybridization of Anomalous Nernst and Off-diagonal Seebeck Effects in Artificially Tilted Multilayers","authors":"Yebin Lee, Fuyuki Ando, Takamasa Hirai, Rajkumar Modak, Hossein Sepehri-Amin, Ken-ichi Uchida","doi":"10.1002/andp.202500127","DOIUrl":"https://doi.org/10.1002/andp.202500127","url":null,"abstract":"<p>Hybrid transverse thermoelectric conversion driven by simultaneous action of multiple phenomena offers a promising route for efficient energy conversion. This study demonstrates magnetic-field-free hybrid transverse thermoelectric conversion based on the anomalous Nernst and off-diagonal Seebeck effects in artificially tilted multilayers comprising SmCo<sub>5</sub>/Bi<sub>0.2</sub>Sb<sub>1.8</sub>Te<sub>3</sub> junctions, where the remanent magnetization of SmCo<sub>5</sub> induces the anomalous Nernst effect in the absence of an external magnetic field. The thermoelectric figure of merit is observed to be 0.299 ± 0.005 at room temperature owing to the additive contribution of the anomalous Nernst effect, indicating that the excellent figure of merit due to the off-diagonal Seebeck effect can further be enhanced by hybridizing the anomalous Nernst effect. These results establish a new approach for high-performance transverse thermoelectric materials, enabling energy harvesting and cooling applications that leverage magnetically controlled thermoelectric effects without requiring an external magnetic field.</p>","PeriodicalId":7896,"journal":{"name":"Annalen der Physik","volume":"537 8","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/andp.202500127","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144809289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Lorentz–Drude Dipoles in the Radiative Limit and Their Modeling in Finite-Difference Time-Domain Methods","authors":"Heming Wang, Shanhui Fan","doi":"10.1002/andp.202500156","DOIUrl":"https://doi.org/10.1002/andp.202500156","url":null,"abstract":"<p>The Lorentz–Drude model for electric dipoles is a classical framework widely used in the study of dipole dynamics and light-matter interactions. This article focuses on the behavior of Lorentz–Drude dipoles when their radiative rate dominates their energy loss. It is asserted that dipole radiation losses do not count toward phenomenological dipole losses if the driving field is interpreted as the total field at the dipole. In particular, if the dipole does not contain non-radiative losses, then the Lorentz–Drude damping term should be removed. This is verified by self-consistent implementations of point dipoles in finite-difference time-domain simulations, which also provide a method to directly compute the transport properties of light when dipoles are present.</p>","PeriodicalId":7896,"journal":{"name":"Annalen der Physik","volume":"537 8","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144809264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"An Easily Computable Measure of Gaussian Quantum Imaginarity","authors":"Ting Zhang, Jinchuan Hou, Xiaofei Qi","doi":"10.1002/andp.202500171","DOIUrl":"https://doi.org/10.1002/andp.202500171","url":null,"abstract":"<p>The resource-theoretic frameworks for quantum imaginarity have been developed in recent years. Within these frameworks, many imaginarity measures for finite-dimensional systems have been proposed. However, for imaginarity of Gaussian states in continuous-variable (CV) systems, there are only two known Gaussian imaginarity measures, which exhibit prohibitive computational complexity when applied to multi-mode Gaussian states. In this paper, a computable Gaussian imaginarity measure <span></span><math>\u0000 <semantics>\u0000 <msup>\u0000 <mi>I</mi>\u0000 <msub>\u0000 <mi>G</mi>\u0000 <mi>n</mi>\u0000 </msub>\u0000 </msup>\u0000 <annotation>$mathcal {I}^{G_n}$</annotation>\u0000 </semantics></math> is proposed for <span></span><math>\u0000 <semantics>\u0000 <mi>n</mi>\u0000 <annotation>$n$</annotation>\u0000 </semantics></math>-mode Gaussian systems. The value of <span></span><math>\u0000 <semantics>\u0000 <msup>\u0000 <mi>I</mi>\u0000 <msub>\u0000 <mi>G</mi>\u0000 <mi>n</mi>\u0000 </msub>\u0000 </msup>\u0000 <annotation>$mathcal {I}^{G_n}$</annotation>\u0000 </semantics></math> is simply formulated by the displacement vectors and covariance matrices of Gaussian states. A comparative analysis of <span></span><math>\u0000 <semantics>\u0000 <msup>\u0000 <mi>I</mi>\u0000 <msub>\u0000 <mi>G</mi>\u0000 <mi>n</mi>\u0000 </msub>\u0000 </msup>\u0000 <annotation>$mathcal {I}^{G_n}$</annotation>\u0000 </semantics></math> with existing two Gaussian imaginarity measures indicates that <span></span><math>\u0000 <semantics>\u0000 <msup>\u0000 <mi>I</mi>\u0000 <msub>\u0000 <mi>G</mi>\u0000 <mi>n</mi>\u0000 </msub>\u0000 </msup>\u0000 <annotation>$mathcal {I}^{G_n}$</annotation>\u0000 </semantics></math> can be used to detect imaginarity in any <span></span><math>\u0000 <semantics>\u0000 <mi>n</mi>\u0000 <annotation>$n$</annotation>\u0000 </semantics></math>-mode Gaussian states more efficiently. As an application, the dynamics behavior of <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mo>(</mo>\u0000 <mn>1</mn>\u0000 <mo>+</mo>\u0000 <mn>1</mn>\u0000 <mo>)</mo>\u0000 </mrow>\u0000 <annotation>$(1+1)$</annotation>\u0000 </semantics></math>-mode Gaussian states is studied in Gaussian Markovian noise environments for two-mode CV system by utilizing <span></span><math>\u0000 <semantics>\u0000 <msup>\u0000 <mi>I</mi>\u0000 <msub>\u0000 ","PeriodicalId":7896,"journal":{"name":"Annalen der Physik","volume":"537 9","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145012830","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Efficient Entanglement Generation of Two Superconducting Qubits in a Circuit QED","authors":"Run-Ying Yan, Zhi-Bo Feng","doi":"10.1002/andp.202500128","DOIUrl":"https://doi.org/10.1002/andp.202500128","url":null,"abstract":"<p>The optimal generation of entangled states is of significance to information processing and state engineering. Here, an efficient scheme is proposed for creating entangled states between two superconducting qubits in a circuit quantum electrodynamics (QED). The two qubits that resonantly interact with a common cavity mode of transmission-line resonator (TLR) can be effectively coupled by the data bus of the microwave resonator. By the invariant-based shortcuts to adiabaticity (STA), two types of maximally entangled states can be controllably induced only by adjusting the Rabi drivings. Based on the resonant drivings with constant rates, the shortcut strategy is capable of implementing faster operations when compared with the dispersive approach. The fidelities are highly robust against the decoherence effects and the instabilities of Rabi rates. Thus the proposal could offer a potential route toward the entanglement generations in an optimized manner.</p>","PeriodicalId":7896,"journal":{"name":"Annalen der Physik","volume":"537 8","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144811123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Phase Control of Stationary Entanglement and Ground-State Cooling of Distant Rotating Mirrors","authors":"Yupeng Chen, Sumei Huang, Li Deng, Aixi Chen","doi":"10.1002/andp.202500110","DOIUrl":"https://doi.org/10.1002/andp.202500110","url":null,"abstract":"<p>The realization of the distant entanglement, especially in the macroscopic domain, is crucial for advancing quantum technology. Here, a scheme is presented to enhance the stationary entanglement between two distant rotating mirrors in a cascaded Laguerre–Gaussian cavity optorotational system by adjusting the phase difference between two counterpropagating driving lasers. These findings indicate that the entanglement between two rotating mirrors can be significantly enhanced by increasing the phase difference between two input lasers. Additionally, the maximum entanglement between two rotating mirrors depends on the effective cavity detuning. Furthermore, increasing the phase difference between two input lasers can enhance the robustness of the entanglement between two mechanical modes against the thermal noise of the environment. Moreover, the phonon numbers of the two rotating mirrors can be reduced by controlling the phase difference of input lasers. And the ground-state cooling of the two rotating mirrors can be achieved at two different phase differences of input lasers, whose difference is about <span></span><math>\u0000 <semantics>\u0000 <mi>π</mi>\u0000 <annotation>$pi$</annotation>\u0000 </semantics></math>.</p>","PeriodicalId":7896,"journal":{"name":"Annalen der Physik","volume":"537 9","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145012942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Design and Optimization of an Enhanced Sonic Black Hole Structure for Low-Frequency Broadband Sound Absorption","authors":"Mingzheng Yang, Changzheng Chen, Linru Wei, Xianming Sun, Fengchao Huang, Tao Yu","doi":"10.1002/andp.202500152","DOIUrl":"https://doi.org/10.1002/andp.202500152","url":null,"abstract":"<p>Here, an enhanced sonic black hole (ESBH) structure is proposed to achieve efficient low-frequency broadband sound absorption. The ESBH design features a conical cavity formed by a bilaterally tapered power-law profile and incorporates porous material filling to enhance acoustic energy dissipation, particularly in the low-frequency range where conventional sonic black hole structures are limited by weak air damping. The theoretical foundation is established using a transfer matrix method that accounts for the modified wave number induced by the porous medium. The model is validated numerically and employed to investigate the influence of key structural parameters on the absorption coefficient. To further enhance performance, a hybrid optimization strategy is utilized that combines a backpropagation neural network with an improved grasshopper optimization algorithm. The optimized structure exhibits superior sound absorption and transmission loss characteristics while minimizing overall volume. Experimental verification demonstrates that the proposed ESBH structure outperforms traditional designs in terms of low-frequency acoustic performance, indicating strong potential for practical noise reduction applications.</p>","PeriodicalId":7896,"journal":{"name":"Annalen der Physik","volume":"537 8","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144811097","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Issue Information: Ann. Phys. 6/2025","authors":"","doi":"10.1002/andp.202570013","DOIUrl":"https://doi.org/10.1002/andp.202570013","url":null,"abstract":"","PeriodicalId":7896,"journal":{"name":"Annalen der Physik","volume":"537 6","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/andp.202570013","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144244238","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}