Annalen der Physik最新文献

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Diffraction-Limited Focusing Using a Polarization-Insensitive Double-Layer Huygens Metalens 偏振不敏感双层惠更斯超透镜衍射限制聚焦
IF 2.3 4区 物理与天体物理
Annalen der Physik Pub Date : 2026-09-07 DOI: 10.1002/andp.70280
Nurul Fahmi Arief Hakim, Gregorius Pascal Foster Sianturi, Fajri Darwis, Suisbiyanto Prasetya, Ashif Aminulloh Fathnan
{"title":"Diffraction-Limited Focusing Using a Polarization-Insensitive Double-Layer Huygens Metalens","authors":"Nurul Fahmi Arief Hakim,&nbsp;Gregorius Pascal Foster Sianturi,&nbsp;Fajri Darwis,&nbsp;Suisbiyanto Prasetya,&nbsp;Ashif Aminulloh Fathnan","doi":"10.1002/andp.70280","DOIUrl":"https://doi.org/10.1002/andp.70280","url":null,"abstract":"<div>\u0000 \u0000 <p>Double-layer Huygens metasurfaces offer an attractive, low-profile alternative to complex multilayer designs, but their inherently coupled electric and magnetic responses typically introduce phase errors that severely degrade wavefront fidelity. Consequently, these ultrathin architectures often struggle to achieve the diffraction-limited focusing required for high-resolution millimeter-wave systems. To overcome this fundamental efficiency-phase trade-off, this paper presents a double-layer Huygens metalens engineered for diffraction-limited operation across both orthogonal linear polarizations. By employing a symmetric and anti-symmetric meta-atom geometry and optimizing interlayer coupling, the proposed design suppresses parasitic phase errors, ensuring <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mn>2</mn>\u0000 <mi>π</mi>\u0000 </mrow>\u0000 <annotation>$2pi$</annotation>\u0000 </semantics></math> phase coverage and preserving wavefront fidelity. Experimental validation of the fabricated prototype in the K-band confirms both its near-field phase fidelity and far-field system performance. Near-field characterizations demonstrate a peak focusing efficiency of 94% at 23.3 GHz and a maximum Strehl ratio of 0.88, quantitatively confirming diffraction-limited spatial resolution. Furthermore, far-field measurements employing a standard horn feed validate practical applicability, achieving a total peak gain of 24.65 dBi and an aperture efficiency of 37.7%. Together, these near- and far-field characterizations validate the system's practical utility, establishing the proposed metalens as a robust, low-profile architecture for advanced millimeter-wave beamforming and sensing.</p>\u0000 </div>","PeriodicalId":7896,"journal":{"name":"Annalen der Physik","volume":"538 9","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148942672","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}
引用次数: 0
Operating a Contextual Stern–Gerlach Apparatus 语境施特恩-格拉赫装置的操作
IF 2.3 4区 物理与天体物理
Annalen der Physik Pub Date : 2026-09-05 DOI: 10.1002/andp.70286
Th. K. Mavrogordatos
{"title":"Operating a Contextual Stern–Gerlach Apparatus","authors":"Th. K. Mavrogordatos","doi":"10.1002/andp.70286","DOIUrl":"https://doi.org/10.1002/andp.70286","url":null,"abstract":"<p>We propose a contextual cavity/circuit QED analog and extension of the Stern–Gerlach experiment, where the pseudo-spin of a two-state “atomic” transition plays the role of the “spin,” while the resonant field driving the transition stands for the “magnetic field.” A phase-sensitive continuous detection of the cavity field coupled to the induced “atomic” dipole affects the stability of the two distinct outcomes. The dressed states comprising the latter give their place to a self-consistent spontaneous dressed-state polarization as the driving strength is lowered. The associated evolution proves anew highly contextual, underpinned by a persistent production of coherent-state superpositions for a particular setting of the monitoring device. Finally, when bistability is absent, we employ the photoelectron “atomic” emission statistics as a diagnostic tool of the cavity field fluctuations.</p>","PeriodicalId":7896,"journal":{"name":"Annalen der Physik","volume":"538 9","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/andp.70286","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148942421","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}
引用次数: 0
Coherence and Local Quantum Fisher Information in Tilted Dirac Systems With Reservoir Memory 具有储层记忆的倾斜狄拉克系统的相干性和局部量子费雪信息
IF 2.3 4区 物理与天体物理
Annalen der Physik Pub Date : 2026-09-03 DOI: 10.1002/andp.70285
Ayyoub El Mouatasim, Abdelghani El Houri, Brahim El Houari, Rachid Houça
{"title":"Coherence and Local Quantum Fisher Information in Tilted Dirac Systems With Reservoir Memory","authors":"Ayyoub El Mouatasim,&nbsp;Abdelghani El Houri,&nbsp;Brahim El Houari,&nbsp;Rachid Houça","doi":"10.1002/andp.70285","DOIUrl":"https://doi.org/10.1002/andp.70285","url":null,"abstract":"<div>\u0000 \u0000 <p>We study quantum resources in tilted-Dirac materials using a thermal state and reservoir-driven dynamics in dissipative weak-coupling and memory-bearing strong-coupling regimes. In contrast to the usual treatments based on the Bellomo formalism and relying on Bell or Werner states, the present approach starts from a physically motivated thermal state of two qubits whose initial properties are determined by the system temperature and the velocity parameters of the underlying Dirac material. The subsequent dynamics is modeled using the Bellomo formalism for two independent qubits, each locally coupled to an independent reservoir. To characterize the evolution, we analyze coherence quantified by the <span></span><math>\u0000 <semantics>\u0000 <msub>\u0000 <mi>l</mi>\u0000 <mn>1</mn>\u0000 </msub>\u0000 <annotation>$l_1$</annotation>\u0000 </semantics></math>-norm and local quantum Fisher information. Weak, effectively Markovian coupling yields monotonic coherence decay, while local quantum Fisher information depends more strongly on parameters, especially at low reservoir temperatures; varying velocity parameters together obscures their individual effects. With strong, memory-bearing coupling, coherence remains suppressed at long times, whereas local quantum Fisher information decreases then recovers to a large asymptotic value. The two measures thus respond differently to thermal, material, and reservoir effects, without implying general practical metrological superiority of local quantum Fisher information.</p>\u0000 </div>","PeriodicalId":7896,"journal":{"name":"Annalen der Physik","volume":"538 9","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148942342","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}
引用次数: 0
Quantum Correlations in Gravitationally Coupled Masses Under Oscillatory Magnetic Driving 振荡磁驱动下引力耦合质量中的量子相关性
IF 2.3 4区 物理与天体物理
Annalen der Physik Pub Date : 2026-09-02 DOI: 10.1002/andp.70271
Mohamed El Harrar, Abdellah Slaoui, Redouane Assad, Mohammed El Falaki, Rachid Ahl Laamara
{"title":"Quantum Correlations in Gravitationally Coupled Masses Under Oscillatory Magnetic Driving","authors":"Mohamed El Harrar,&nbsp;Abdellah Slaoui,&nbsp;Redouane Assad,&nbsp;Mohammed El Falaki,&nbsp;Rachid Ahl Laamara","doi":"10.1002/andp.70271","DOIUrl":"https://doi.org/10.1002/andp.70271","url":null,"abstract":"&lt;div&gt;\u0000 \u0000 &lt;p&gt;We investigate time-dependent quantum correlations in a system of three gravitationally coupled quantum masses subjected to an oscillatory magnetic field &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;B&lt;/mi&gt;\u0000 &lt;mo&gt;(&lt;/mo&gt;\u0000 &lt;mi&gt;t&lt;/mi&gt;\u0000 &lt;mo&gt;)&lt;/mo&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$B(t)$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;, using the thermal density matrix formalism, we analyze the dynamics of quantum coherence &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;C&lt;/mi&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;l&lt;/mi&gt;\u0000 &lt;mn&gt;1&lt;/mn&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/msub&gt;\u0000 &lt;annotation&gt;$C_{l_1}$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;, quantum negativity &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mi&gt;N&lt;/mi&gt;\u0000 &lt;annotation&gt;$mathcal {N}$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;, local quantum uncertainty (&lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mi&gt;LQU&lt;/mi&gt;\u0000 &lt;annotation&gt;$mathcal {LQU}$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;), and local quantum Fisher information (&lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mi&gt;LQFI&lt;/mi&gt;\u0000 &lt;annotation&gt;$mathcal {LQFI}$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;) as functions of time and key physical parameters, including the gravitational coupling strength &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mi&gt;Δ&lt;/mi&gt;\u0000 &lt;annotation&gt;$Delta$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;, magnetic field amplitude &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;B&lt;/mi&gt;\u0000 &lt;mn&gt;0&lt;/mn&gt;\u0000 &lt;/msub&gt;\u0000 &lt;annotation&gt;$B_0$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;, magnetic–mass coupling constant &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mi&gt;γ&lt;/mi&gt;\u0000 &lt;annotation&gt;$gamma$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;, intrinsic energy &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mi&gt;ω&lt;/mi&gt;\u0000 &lt;annotation&gt;$omega$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;, and temperature &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mi&gt;T&lt;/mi&gt;\u0000 &lt;annotation&gt;$T$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;. Our results reveal rich dynamical behavior: quantum coherence exhibits pronounced temporal minima for moderate &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mi&gt;Δ&lt;/mi&gt;\u0000 &lt;annotation&gt;$Delta$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;, while strong coupling suppresses time dependence, while entanglement remains robust against thermal effects and shows a non-monotonic dependence on magnetic field parameters, moreover, &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mi&gt;LQU&lt;/mi&gt;\u0000 &lt;annotation&gt;$mat","PeriodicalId":7896,"journal":{"name":"Annalen der Physik","volume":"538 9","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148942154","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}
引用次数: 0
Correction to “Spin-s U(1)-Eigenstate Preparation” 对“自旋U(1)-本征态制备”的修正
IF 2.3 4区 物理与天体物理
Annalen der Physik Pub Date : 2026-08-31 DOI: 10.1002/andp.70281
{"title":"Correction to “Spin-s U(1)-Eigenstate Preparation”","authors":"","doi":"10.1002/andp.70281","DOIUrl":"https://doi.org/10.1002/andp.70281","url":null,"abstract":"<p>N. Zare Harofteh and R. I. Nepomechie, “ Spin-s <i>U</i>(1)-Eigenstate Preparation,” Annalen der Physik 538, no. 7 (2026): e70239, https://doi.org/10.1002/andp.70239</p><p>All calculations were performed using the correct expression, and therefore the results and conclusions of the paper are unchanged.</p>","PeriodicalId":7896,"journal":{"name":"Annalen der Physik","volume":"538 9","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/andp.70281","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148943487","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}
引用次数: 0
Quantum Limits to Linewidth Narrowing in Single- and Few-Atom Cavity Electromagnetically Induced Transparency 单原子和少原子腔电磁感应透明中线宽变窄的量子限制
IF 2.3 4区 物理与天体物理
Annalen der Physik Pub Date : 2026-08-29 DOI: 10.1002/andp.70283
Lucas R. S. Santos, Murilo H. Oliveira, Luiz O. R. Solak, Daniel Z. Rossatto, Celso J. Villas-Boas
{"title":"Quantum Limits to Linewidth Narrowing in Single- and Few-Atom Cavity Electromagnetically Induced Transparency","authors":"Lucas R. S. Santos,&nbsp;Murilo H. Oliveira,&nbsp;Luiz O. R. Solak,&nbsp;Daniel Z. Rossatto,&nbsp;Celso J. Villas-Boas","doi":"10.1002/andp.70283","DOIUrl":"https://doi.org/10.1002/andp.70283","url":null,"abstract":"<p>Electromagnetically induced transparency (EIT) in cavities can narrow the transmission resonance below the empty-cavity linewidth. We investigate the limits of this narrowing from a single emitter to the few-atom regime. Using a Lindblad master equation for <span></span><math>\u0000 <semantics>\u0000 <msub>\u0000 <mi>N</mi>\u0000 <mtext>at</mtext>\u0000 </msub>\u0000 <annotation>$N_{text{at}}$</annotation>\u0000 </semantics></math> identical three-level atoms coupled to a cavity mode, driven by coherent probe and control fields, we compute the full width at half maximum (FWHM) of the transparency feature. In the strictly low-excitation limit, we derive an analytical cubic polynomial that captures the narrowing and recovers the known linear-response scaling. For finite probe powers, the achievable linewidth faces a quantum bound on the minimum achievable linewidth. Contrasting our model with a semiclassical approximation, we show this limitation arises from the unavoidable excitation of higher-order multiphoton states. Their intrinsically larger decay rates destroy the ideal single-excitation EIT dark state. Increasing <span></span><math>\u0000 <semantics>\u0000 <msub>\u0000 <mi>N</mi>\u0000 <mtext>at</mtext>\u0000 </msub>\u0000 <annotation>$N_{text{at}}$</annotation>\u0000 </semantics></math> enhances collective cooperativity, creating a multiphoton blockade that suppresses these detrimental excitations and yields a stepwise reduction of the minimum FWHM. Our results provide analytical boundaries for cavity-EIT linewidth control, guiding the optimization of narrowband filters and highly coherent light–matter interfaces.</p>","PeriodicalId":7896,"journal":{"name":"Annalen der Physik","volume":"538 9","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/andp.70283","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148943653","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}
引用次数: 0
Multipolar Coupling Engineered by Normalized Geometric Torsion for Enhanced Chiral Plasmonic Responses 用归一化几何扭转设计的多极耦合增强手性等离子体响应
IF 2.3 4区 物理与天体物理
Annalen der Physik Pub Date : 2026-08-27 DOI: 10.1002/andp.70282
Guodong Zhu, Yuan Wang, Mingyue Xia, Zhiguang Sun, Yurui Fang
{"title":"Multipolar Coupling Engineered by Normalized Geometric Torsion for Enhanced Chiral Plasmonic Responses","authors":"Guodong Zhu,&nbsp;Yuan Wang,&nbsp;Mingyue Xia,&nbsp;Zhiguang Sun,&nbsp;Yurui Fang","doi":"10.1002/andp.70282","DOIUrl":"https://doi.org/10.1002/andp.70282","url":null,"abstract":"<div>\u0000 \u0000 <p>Plasmonic chiral nanoantennas offer exceptional opportunities for chiral sensing and polarization control, yet rational design is still limited by unclear higher-order mode coupling and the absence of intuitive geometric guidance. Here, we investigate multipolar mode coupling in single gold helical nanoantennas via full polarizability tensor retrieval. We demonstrate that optical activity arises from electric dipole–magnetic dipole coupling at the fundamental resonance and electric dipole–electric quadrupole coupling at the higher-order resonance. We introduce a normalized geometric torsion factor that quantitatively links structural twist to chiroptical response and mode-dependent far-field scattering, enabling direct optimization without exhaustive parameter scanning. This work establishes a unified framework for understanding and engineering strong optical chirality, providing a general strategy for high-performance chiral nanophotonic devices.</p>\u0000 </div>","PeriodicalId":7896,"journal":{"name":"Annalen der Physik","volume":"538 9","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148848971","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}
引用次数: 0
Quantum Master Equation for Electronic Structure in Open Graphene: Non-Hermitian Hamiltonians and Types of Dissipative Dynamics 开放石墨烯中电子结构的量子主方程:非厄米哈密顿量和耗散动力学类型
IF 2.3 4区 物理与天体物理
Annalen der Physik Pub Date : 2026-08-26 DOI: 10.1002/andp.70279
Konstantin G. Zloshchastiev
{"title":"Quantum Master Equation for Electronic Structure in Open Graphene: Non-Hermitian Hamiltonians and Types of Dissipative Dynamics","authors":"Konstantin G. Zloshchastiev","doi":"10.1002/andp.70279","DOIUrl":"https://doi.org/10.1002/andp.70279","url":null,"abstract":"<p>A reduced density operator approach is proposed for electron hopping between the nearest neighboring carbon atoms in the monolayer graphene lattice in the presence of the environment. To analytically describe at least the simplest of dissipative effects which can occur, we consider the tight-binding approximation and propose the minimal non-Hermitian extension of the band Hamiltonian, which models spontaneous emission or injection in bands as collective states of electrons in the presence of lattice atoms. We find that two types of dissipative evolution can exist in the open graphene's electronic structure, depending on whether it is sustainable (e.g. supported by particle injections of some kind) or undergoing an irreversible decay. In the first case, the master equation is nonlinear with respect to the density operator; whereas in the second case it is linear but does not conserve the trace norm. We also consider the evolution of pure states, which allows us to separate quantum-mechanical properties from statistical ones, and derive the effective Hamiltonian and the Schrödinger equation which turns out to be nonlinear. The evolution equations which result indicate that electronic transport in graphene becomes significantly complex in the presence of even weak dissipative effects.</p>","PeriodicalId":7896,"journal":{"name":"Annalen der Physik","volume":"538 9","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/andp.70279","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148816442","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}
引用次数: 0
Issue Information: Ann. Phys. 9/2026 发布信息:Ann。理论物理的9/2026
IF 2.3 4区 物理与天体物理
Annalen der Physik Pub Date : 2026-08-26 DOI: 10.1002/andp.70284
{"title":"Issue Information: Ann. Phys. 9/2026","authors":"","doi":"10.1002/andp.70284","DOIUrl":"https://doi.org/10.1002/andp.70284","url":null,"abstract":"","PeriodicalId":7896,"journal":{"name":"Annalen der Physik","volume":"538 9","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/andp.70284","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148816667","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}
引用次数: 0
Geometry-Aware Decoherence Maps for Tunable Quantum-Dot Qubits: A Physics-Informed Surrogate Modeling Study 可调谐量子点量子比特的几何感知退相干映射:一个物理知情的代理建模研究
IF 2.3 4区 物理与天体物理
Annalen der Physik Pub Date : 2026-08-22 DOI: 10.1002/andp.70277
Maurice Tiotsop
{"title":"Geometry-Aware Decoherence Maps for Tunable Quantum-Dot Qubits: A Physics-Informed Surrogate Modeling Study","authors":"Maurice Tiotsop","doi":"10.1002/andp.70277","DOIUrl":"https://doi.org/10.1002/andp.70277","url":null,"abstract":"<div>\u0000 \u0000 <p>Quantum-dot qubits offer strong tunability, but their sensitivity to geometry, external fields, and model parameters makes decoherence prediction computationally demanding. Here, we present a physics-informed surrogate modeling framework to construct geometry-aware decoherence maps for tunable quantum-dot qubits. Using an effective two-level model with parabolic and triangular confinement and a physically motivated phenomenological Lindblad-rate model, we compute the transition frequency, an entropy-based information metric, and a coherence-time proxy over a controlled multidimensional parameter sweep.</p>\u0000 <p>The resulting 250-sample dataset is used to train two compact, toolbox-free surrogate models: a quadratic polynomial model and a Gaussian radial basis function surrogate. Both reproduce the physics model with <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <msup>\u0000 <mi>R</mi>\u0000 <mn>2</mn>\u0000 </msup>\u0000 <mo>&gt;</mo>\u0000 <mn>0.97</mn>\u0000 </mrow>\u0000 <annotation>$R^2&gt;0.97$</annotation>\u0000 </semantics></math> under 5-fold cross-validation and provide <span></span><math>\u0000 <semantics>\u0000 <mo>∼</mo>\u0000 <annotation>$sim$</annotation>\u0000 </semantics></math>260–950<span></span><math>\u0000 <semantics>\u0000 <mo>×</mo>\u0000 <annotation>$times$</annotation>\u0000 </semantics></math> faster predictions than direct diagonalization. A composite operating-point score is evaluated across 66 weighting choices to assess robustness.</p>\u0000 <p>Within this simplified model, near-parabolic confinement yields a more stable spectral response and broader robust operating region, whereas triangular distortion enhances electric-field tunability but narrows the coherence-preserving window. The electric field is the dominant control parameter, while the magnetic field has a weaker secondary role. These results illustrate a transferable surrogate-assisted strategy for rapid qubit design-space exploration.</p>\u0000 </div>","PeriodicalId":7896,"journal":{"name":"Annalen der Physik","volume":"538 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148784601","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}
引用次数: 0
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