Annalen der Physik最新文献

{"title":"Mechanical Squeezing via Pump Modulation in a Double-Cavity Optomechanical System With Optical Parametric Amplifier","authors":"Hao-Tian Wu,&nbsp;Ping-Chi Ge,&nbsp;Xue Han,&nbsp;Shou Zhang,&nbsp;Hong-Fu Wang","doi":"10.1002/andp.202400427","DOIUrl":"https://doi.org/10.1002/andp.202400427","url":null,"abstract":"<p>A novel and efficient method is proposed for generating mechanical squeezing in a double-cavity optomechanical system by introducing an optical parametric amplifier (OPA) with pump modulation (PM). The combined effects of periodic amplitude modulation of the driving laser and the OPA enable mechanical squeezing in both the resolved-sideband and unresolved-sideband regimes, with significantly enhanced squeezing observed in the resolved-sideband regime. The individual contributions of the OPA and PM to mechanical squeezing is systematically investigated, with results indicating that PM plays a more dominant role. Additionally, the proposed scheme demonstrates excellent robustness against environmental thermal noise. These findings highlight the potential of this approach for advancing quantum precision measurements and exploring macroscopic quantum phenomena.</p>","PeriodicalId":7896,"journal":{"name":"Annalen der Physik","volume":"537 6","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144244947","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. 3/2025","authors":"","doi":"10.1002/andp.202570007","DOIUrl":"https://doi.org/10.1002/andp.202570007","url":null,"abstract":"","PeriodicalId":7896,"journal":{"name":"Annalen der Physik","volume":"537 3","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/andp.202570007","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143594957","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":"(Ann. Phys. 3/2025)","authors":"","doi":"10.1002/andp.202570006","DOIUrl":"https://doi.org/10.1002/andp.202570006","url":null,"abstract":"<p><b>Metamaterials</b></p><p>In article number 2400250, Yueyi Yuan, Yue Wang, Kuang Zhang, and co-workers systematically classify bound states in the continuum (BICs) phenomena and discuss their theoretical formation mechanisms and topological properties. Current advancements and applications of BIC-engineered devices are examined, alongside key challenges such as structural precision, material selection, and measurement complexities. Prospective directions for future research and development in the field of BICs are also outlined.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":7896,"journal":{"name":"Annalen der Physik","volume":"537 3","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/andp.202570006","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143594956","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":"Localized and Extended Phases in Square Moiré Patterns","authors":"C. Madroñero,&nbsp;G. A. Domínguez-Castro,&nbsp;R. Paredes","doi":"10.1002/andp.202400309","DOIUrl":"https://doi.org/10.1002/andp.202400309","url":null,"abstract":"<p>Random defects do not constitute the unique source of electron localization in two dimensions. Lattice quasidisorder generated from two inplane superimposed rotated, main and secondary, square lattices, namely monolayers where moiré patterns are formed, leads to a sharp localized to delocalized single-particle transition. This is demonstrated here for both, discrete and continuum models of moiré patterns that arise as the twisting angle <span></span><math>\u0000 <semantics>\u0000 <mi>θ</mi>\u0000 <annotation>$theta$</annotation>\u0000 </semantics></math> between the main and the secondary lattices is varied in the interval <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mo>[</mo>\u0000 <mn>0</mn>\u0000 <mo>,</mo>\u0000 <mi>π</mi>\u0000 <mo>/</mo>\u0000 <mn>4</mn>\u0000 <mo>]</mo>\u0000 </mrow>\u0000 <annotation>$[0, pi /4]$</annotation>\u0000 </semantics></math>. Localized to delocalized transition is recognized as the moiré patterns depart from being perfect square crystals to non-crystalline structures. Extended single-particle states are found for rotation angles associated with Pythagorean triples that produce perfectly periodic structures. Conversely, angles not arising from such Pythagorean triples lead to non-commensurate or quasidisordered structures, thus originating localized states. These conclusions are drawn from a stationary analysis where the standard inverse participation ratio (IPR) parameter measuring localization allowed to detect the transition. While both, ground state and excited states are analyzed for the discrete model, where the secondary lattice is considered as a perturbation of the main one, the sharp transition is tracked back for the fundamental state in the continuous scenario where the secondary lattice is not a perturbation any more.</p>","PeriodicalId":7896,"journal":{"name":"Annalen der Physik","volume":"537 6","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/andp.202400309","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144244943","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":"Exciton Kinetics Within Two Interacting Quantum Dots Featuring the A-Type Blinking—Kinetic Monte Carlo Approach for Coupled QDs Simulations","authors":"Bartłomiej Cichy,&nbsp;Rafał Kosman,&nbsp;Adam Olejniczak","doi":"10.1002/andp.202400409","DOIUrl":"https://doi.org/10.1002/andp.202400409","url":null,"abstract":"<p>Since the first reports of quantum dot (QD) based quasi-molecules formed by near-field-coupled QDs, how to design and apply such systems in the field of quantum information processing are still in learning process. Experimentally, single-particle spectroscopy is the method of choice for studying kinetic processes in such structures. However, current efforts focus on detecting all the photons emitted by the quasi-molecule, making it difficult to understand the precise changes occurring in each of the coupled QDs. In this study, a different approach is implemented by adapting the kinetic Monte Carlo algorithms to gain comprehensive insights into the temporal evolution of each coupled QD. This encompasses not only photon emission events, but also the full range of kinetic processes, including exciton transfer between the QDs. It is, therefore, important to gain insight into the adaptation pathways caused by exciton exchange between near-field coupled QDs. The attention is strict to a system of two interacting QDs in different coupling regimes. The results point to new mechanisms of sequential/cascade excitonic relaxation, which are not typical for a QD in an isolated state. For this reason, the methodology presented here seems to be significant and complementary to the experimental approach.</p>","PeriodicalId":7896,"journal":{"name":"Annalen der Physik","volume":"537 6","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144244296","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":"Quantum-Classical Simulation of Quantum Field Theory by Quantum Circuit Learning","authors":"Kazuki Ikeda","doi":"10.1002/andp.202400415","DOIUrl":"https://doi.org/10.1002/andp.202400415","url":null,"abstract":"<p>Quantum circuit learning is employed to simulate quantum field theories (QFTs). Typically, when simulating QFTs with quantum computers, significant challenges are encountered due to the technical limitations of quantum devices when implementing the Hamiltonian using Pauli spin matrices. To address this challenge, quantum circuit learning is leveraged, employing a compact configuration of qubits and low-depth quantum circuits to predict real-time dynamics in quantum field theories. The key advantage of this approach is that a single-qubit measurement can accurately forecast various physical parameters, including fully-connected operators. To demonstrate the effectiveness of this method, it is used to predict quench dynamics, chiral dynamics and jet production in a 1+1-dimensional model of quantum electrodynamics. It is found that our predictions closely align with the results of rigorous classical calculations, exhibiting a high degree of accuracy. This hybrid quantum-classical approach illustrates the feasibility of efficiently simulating large-scale QFTs on cutting-edge quantum devices.</p>","PeriodicalId":7896,"journal":{"name":"Annalen der Physik","volume":"537 6","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/andp.202400415","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144245150","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":"Fresnel Diffraction of a Shifted Incident Beam on Double Fork-Shaped Gratings","authors":"Denis A. Ikonnikov,&nbsp;Erdeny C. Darmaev,&nbsp;Sergey A. Myslivets","doi":"10.1002/andp.202400436","DOIUrl":"https://doi.org/10.1002/andp.202400436","url":null,"abstract":"<p>Diffraction of shifted incident beam on double fork-shaped gratings with unit charges has been numerically simulated by the using of the Fresnel diffraction integral. The trajectories of singularities dependance on the position of the incident Gaussian beam have been investigated. For the case of same topological charges of dislocations it is shown that the shift of incident beam along the horizontal axis leads to the shift of singularities trajectories along the vertical axis, and vice versa. It is shown, that these results can be qualitatively predicted by using the hydrodynamic approach. For the case of diffraction on double fork-shaped grating which have dislocations with topological charges of opposite signs, the effect of the incident beam center shift depends on the initial distance between dislocations <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mn>2</mn>\u0000 <msub>\u0000 <mi>r</mi>\u0000 <mi>d</mi>\u0000 </msub>\u0000 </mrow>\u0000 <annotation>$2r_d$</annotation>\u0000 </semantics></math> as well as the initial positions of positive and negative topological charges. The aforementioned findings shows that the result of diffraction on the double fork-shaped gratings highly depends on the position of the incident beam center, and therefore, it provides the valuable information that can enrich our understanding of the spatial dynamics of optical vortices.</p>","PeriodicalId":7896,"journal":{"name":"Annalen der Physik","volume":"537 6","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144245105","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":"Space-Time Non-Separable Dynamics of Ultrashort Vortex Pulse With Power Exponential Spectrum","authors":"Shakti Singh,&nbsp;Akhilesh Kumar Mishra","doi":"10.1002/andp.202400449","DOIUrl":"https://doi.org/10.1002/andp.202400449","url":null,"abstract":"<p>Ultrashort optical pulses with orbital angular momentum (OAM) owing to their applications in classical as well as quantum domains attract a lot of research attention. The evolution of their spatio-temporal dynamics is of particular interest. In the present work, the spatio-temporal evolution of ultrashort Laguerre Gauss (LG) vortex with power exponential spectrum, also called power exponential (PE) pulse is numerically explored, in dispersive and nonlinear media. The evolution of space-time non-separable ultrashort vortex pulse is specifically addressed. The study reveals the asymmetric spatio-temporal evolution and splitting in the spatio-temporal plane. Compression at the trailing edge of the pulse is observed with increase in the strength of the nonlinearity. The study further reveals that the temporal, spectral, and chirp evolution patterns of the pulse vary uniquely across different spatial regions and these variations depend upon the strength of nonlinearity and propagation distance. In weak nonlinear regime, a redshift in the spectrum is observed as one moves radially outward from the bright caustic of the ultrashort LG vortex, while a blueshifted spectrum emerges as one approaches the phase singularity. Interestingly, as the pulse furthers in the medium, nonlinearity induced spectral shift is witnessed and with stronger nonlinearity, a complex spectral evolution is observed.</p>","PeriodicalId":7896,"journal":{"name":"Annalen der Physik","volume":"537 5","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143939681","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":"Thermal-Hydraulic Performance and Entropy Generation Analysis of a Square Molten Salt Absorber Tube with Wavy-Tape Insert at Low Reynolds Number","authors":"Yang Yang,&nbsp;Yang Zou","doi":"10.1002/andp.202400434","DOIUrl":"https://doi.org/10.1002/andp.202400434","url":null,"abstract":"<p>During periods of weak sunlight, to maintain the molten salt temperature in a square absorber tube (SAT), the flow is at low Reynolds number (<i>Re</i>), accompanied by low heat transfer (HR) performance. To enhance the HR performance of a square molten salt absorber tube (AE) at low <i>Re</i>, a wavy-tape insert (WET) is first introduced. The performance of square molten salt AE with WET is evaluated under various operational conditions and structural parameters. Results show that the WET generates a substantial swirling flow in the square molten salt AE, which promotes the fluid mixing and then enhances HR. Compared to a smooth SAT, the friction factor (<i>f</i>) for square molten salt AE with WET increases by at least 2.55 times, whereas the Nusselt number (<i>Nu</i>) increases by 1.11–5.77 times. Additionally, the entropy generation rate (EGR) and exergy loss (EL) decrease by 35.54%–82.65% and 43.43%–84.61%, respectively. Furthermore, the transport efficiency of thermal energy (TETE) and exergy efficiency (EE) increase by 6.58%–26.24% and 10.26%–46.13%, respectively. This study may have the potential to offer valuable insights for the design of square molten salt AE at low <i>Re</i>, particularly in terms of improving efficiency.</p>","PeriodicalId":7896,"journal":{"name":"Annalen der Physik","volume":"537 5","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143939391","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":"Setup and Characterization of a Fiber Brillouin Amplifier Module for Optical Frequency Transfer Over Interferometric Fiber Links","authors":"Alexander Kuhl,&nbsp;Sebastian Koke,&nbsp;Andreas Koczwara,&nbsp;Thomas Waterholter,&nbsp;Gesine Grosche","doi":"10.1002/andp.202400414","DOIUrl":"https://doi.org/10.1002/andp.202400414","url":null,"abstract":"<p>The details of fiber Brillouin amplifier modules developed for optical frequency dissemination and installed on the fiber link between Braunschweig and Strasbourg for performing optical clock comparisons are described and documented. The performance of these fiber Brillouin amplification modules is characterized in terms of gain, one-way phase shift, and signal-to-noise ratio across a wide parameter space of signal and pump powers. Finally, upper estimates are derived for the frequency transfer uncertainty contributions resulting from the non-reciprocity induced by the fiber Brillouin amplifier modules based on the characterized one-way phase shift.</p>","PeriodicalId":7896,"journal":{"name":"Annalen der Physik","volume":"537 5","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/andp.202400414","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143939670","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}