Annals of Physics最新文献_第9页

Transport properties through alternating borophene and graphene superlattices 硼吩与石墨烯交替超晶格的传输特性

IF 3 3区物理与天体物理

Annals of Physics Pub Date : 2024-07-11 DOI: 10.1016/j.aop.2024.169743

Nadia Benlakhouy , Abderrahim El Mouhafid , Ahmed Jellal

{"title":"Transport properties through alternating borophene and graphene superlattices","authors":"Nadia Benlakhouy , Abderrahim El Mouhafid , Ahmed Jellal","doi":"10.1016/j.aop.2024.169743","DOIUrl":"10.1016/j.aop.2024.169743","url":null,"abstract":"<div><p>The electronic transport properties of two junctions (BGB, GBG) made of borophene (B) and graphene (G) are investigated. Using the transfer matrix method with Chebyshev polynomials, we have studied single and multiple barriers in a superlattice configuration. We showed that a single barrier exhibits remarkable tilted transport properties, with perfect transmission observed for both junctions under normal incidence. We found that robust superlattice transmission is maintained for multiple barriers, particularly in the BGB junction. It turns out that by varying the incident energy, many gaps appear in the transmission probability. The number, width, and position of these transmission gaps can be manipulated by adjusting the number of cells, incident angle, and barrier characteristics. For diffuse transport, we observed considerable variations in transmission probability, conductance and the Fano factor, highlighting the sensitivity of these junctions to the physical parameters. We showed different behaviors between BGB and GBG junctions, particularly with respect to the response of conductance and Fano factor when barrier height varies. For ballistic transport, we have seen that the minimum scaled conductance is related to the maximum Fano factor, demonstrating their control under specific conditions of the physical parameters. Analysis of the length ratio (geometric factor) revealed some remarkable patterns, where scaled conductance and the Fano factor converged to certain values as the ratio approached infinity.</p></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"468 ","pages":"Article 169743"},"PeriodicalIF":3.0,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141638302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Nambu-covariant many-body theory II: Self-consistent approximations 南布协变多体理论 II：自洽近似

IF 3 3区物理与天体物理

Annals of Physics Pub Date : 2024-07-11 DOI: 10.1016/j.aop.2024.169730

M. Drissi , A. Rios , C. Barbieri

{"title":"Nambu-covariant many-body theory II: Self-consistent approximations","authors":"M. Drissi , A. Rios , C. Barbieri","doi":"10.1016/j.aop.2024.169730","DOIUrl":"10.1016/j.aop.2024.169730","url":null,"abstract":"<div><p>The theory of Self-Consistent Green’s Function (SCGF) is reformulated in an explicit Nambu-covariant fashion for applications to many-body systems at non-zero temperature in symmetry-broken phases. This is achieved by extending the Nambu-covariant formulation of perturbation theory, presented in the first part of this work, to non-perturbative schemes based on self-consistently dressed propagators and vertices. We work out in detail the self-consistent ladder approximation, motivated by a trade-off between numerical complexity and many-body phenomenology. Taking a complex general Hartree–Fock–Bogoliubov (HFB) propagator as a starting point, we also formulate and prove a sufficient condition on the stability of the HFB self-energy to ensure the convergence of the initial series of ladders at any energy. The self-consistent ladder approximation is written purely in terms of spectral functions and the resulting set of equations, when expressed in terms of Nambu tensors, are remarkably similar to those in the symmetry-conserving case. This puts the application of the self-consistent ladder approximation to symmetry-broken phases of infinite nuclear matter within reach.</p></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"469 ","pages":"Article 169730"},"PeriodicalIF":3.0,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141939777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Gauge formulation for magnetic monopoles from generalized gauge fields 来自广义规量场的磁单极子规量公式

IF 3 3区物理与天体物理

Annals of Physics Pub Date : 2024-07-11 DOI: 10.1016/j.aop.2024.169740

G.A. de Oliveira , F.E. Barone , F.A. Barone , J.A. Helayël-Neto

引用次数: 0

Perturbation-based nonperturbative method 基于扰动的非扰动方法

IF 3 3区物理与天体物理

Annals of Physics Pub Date : 2024-07-10 DOI: 10.1016/j.aop.2024.169741

Chang Liu , Wen-Du Li , Wu-Sheng Dai

引用次数: 0

Star exponentials from propagators and path integrals 来自传播者和路径积分的星形指数

IF 3 3区物理与天体物理

Annals of Physics Pub Date : 2024-07-10 DOI: 10.1016/j.aop.2024.169744

Jasel Berra–Montiel , Hugo García–Compeán , Alberto Molgado

引用次数: 0

Nambu-covariant many-body theory I: Perturbative approximations 南布协变多体理论 I：惯性逼近

IF 3 3区物理与天体物理

Annals of Physics Pub Date : 2024-07-08 DOI: 10.1016/j.aop.2024.169729

M. Drissi , A. Rios , C. Barbieri

引用次数: 0

Adiabatic driving, geometric phases, and the geometric tensor for classical states 经典态的绝热驱动、几何相位和几何张量

IF 3 3区物理与天体物理

Annals of Physics Pub Date : 2024-07-04 DOI: 10.1016/j.aop.2024.169728

A.D. Bermúdez Manjarres

{"title":"Adiabatic driving, geometric phases, and the geometric tensor for classical states","authors":"A.D. Bermúdez Manjarres","doi":"10.1016/j.aop.2024.169728","DOIUrl":"https://doi.org/10.1016/j.aop.2024.169728","url":null,"abstract":"<div><p>We use the Hilbert space formulation of classical mechanics, known as the Koopman–von Neumann formalism, to study adiabatic driving, geometric phases, and the geometric tensor for classical states. In close relation to what happens to a quantum state, a classical Koopman–von Neumann eigenstate will acquire a geometric phase factor <span><math><mrow><mi>e</mi><mi>x</mi><mi>p</mi><mfenced><mrow><mi>i</mi><mi>Φ</mi></mrow></mfenced></mrow></math></span> after a closed variation of the parameters <span><math><mi>λ</mi></math></span> in its associated Hamiltonian. The explicit form of <span><math><mi>Φ</mi></math></span> is then derived for integrable systems, and its relation with the Hannay angle is shown. Additionally, we use quantum formulas to write an adiabatic gauge potential that generates adiabatic unitary flow between classical eigenstates, and we explicitly show the relationship between the potential and the classical geometric phase. We also define a classical analog of the geometric tensor, thus defining a Fubini–Study metric for classical states, and we use the singularities of the tensor to link the transition from Arnold–Liouville integrability to chaos with some of the mathematical formalism of quantum phase transitions. While the formulas and definitions we use originate in quantum mechanics, all the results found are purely classical, no classical or semiclassical limit is ever taken.</p></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"468 ","pages":"Article 169728"},"PeriodicalIF":3.0,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141582583","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Abstract ladder operators for non self-adjoint Hamiltonians, with applications 非自相关哈密顿的抽象梯形算子及其应用

IF 3 3区物理与天体物理

Annals of Physics Pub Date : 2024-07-04 DOI: 10.1016/j.aop.2024.169727

F. Bagarello

引用次数: 0

Anisotropic Ginzburg–Landau model for superconductivity with five-dimensional operators 具有五维算子的各向异性金兹堡-兰道超导模型

IF 3 3区物理与天体物理

Annals of Physics Pub Date : 2024-07-04 DOI: 10.1016/j.aop.2024.169726

M.C. Araújo , I.C. Jardim , D.F.S. Veras , J. Furtado

引用次数: 0

Low-energy theorems and linearity breaking in anomalous amplitudes 反常振幅的低能定理和线性突破

IF 3 3区物理与天体物理

Annals of Physics Pub Date : 2024-07-03 DOI: 10.1016/j.aop.2024.169725

J.F. Thuorst , L. Ebani , T.J. Girardi

{"title":"Low-energy theorems and linearity breaking in anomalous amplitudes","authors":"J.F. Thuorst , L. Ebani , T.J. Girardi","doi":"10.1016/j.aop.2024.169725","DOIUrl":"10.1016/j.aop.2024.169725","url":null,"abstract":"<div><p>This study seeks a better comprehension of anomalies by exploring <span><math><mrow><mo>(</mo><mi>n</mi><mo>+</mo><mn>1</mn><mo>)</mo></mrow></math></span>-point perturbative amplitudes in a <span><math><mrow><mn>2</mn><mi>n</mi></mrow></math></span>-dimensional framework. The involved structures combine axial and vector vertices into odd tensors. This configuration enables diverse expressions, considered identities at the integrand level. However, connecting them is not automatic after loop integration, as the divergent nature of amplitudes links to surface terms. The background to this subject is the conflict between the linearity of integration and the translational invariance observed in the context of anomalies. That prohibits the simultaneous satisfaction of all symmetry and linearity properties, constraints that arise through Ward identities and relations among Green functions. Using the method known as Implicit Regularization, we show that trace choices are a means to select the amount of anomaly contributions appearing in each symmetry relation. Such an idea appeared through recipes to take traces in recent works, but we introduce a more complete view. We also emphasize low-energy theorems of finite amplitudes as the source of these violations, proving that the total amount of anomaly remains fixed regardless of any choices.</p></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"468 ","pages":"Article 169725"},"PeriodicalIF":3.0,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141623824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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