Indonesian Journal of Physics最新文献_第2页

Application of The Computational Semi-Empirical Method in Calculating The Fission Yield with Reference to The JENDL Data 计算半经验方法在JENDL数据计算裂变产率中的应用

Indonesian Journal of Physics Pub Date : 2022-12-22 DOI: 10.5614/itb.ijp.2022.33.2.5

R. Kurniadi

引用次数: 0

Modified Boltzmann Factor on Rupture Probability 破裂概率的修正玻尔兹曼因子

Indonesian Journal of Physics Pub Date : 2022-12-22 DOI: 10.5614/itb.ijp.2022.33.2.2

R. Kurniadi

引用次数: 0

An An Interacting Dark Energy Model with Nonminimal Derivative Coupling in the Parameterized Post-Friedmannian Framework 参数化后弗里德曼框架下非极小导数耦合的相互作用暗能量模型

Indonesian Journal of Physics Pub Date : 2022-12-22 DOI: 10.5614/itb.ijp.2022.33.2.1

A. Widiyani, A. Sutiono

引用次数: 0

Alpha Decay Half-Lives Calculation of Even-Even Nuclei in the62≤Z≤100Region using Woods-Saxon Potential 用Woods-Saxon势计算62≤Z≤100区偶-偶核的α衰变半衰期

Indonesian Journal of Physics Pub Date : 2022-12-22 DOI: 10.5614/itb.ijp.2022.33.2.4

R. Kurniadi

引用次数: 0

Compatibility of Einstein-Gauss-Bonnet inflation theory with non-minimal derivative coupling in the constant-roll Einstein-Gauss-Bonnet膨胀理论与常滚非极小导数耦合的相容性

Indonesian Journal of Physics Pub Date : 2022-10-31 DOI: 10.5614/itb.ijp.2022.33.1.2

Naufal Aulia Adam, G. Hikmawan, F. P. Zen

{"title":"Compatibility of Einstein-Gauss-Bonnet inflation theory with non-minimal derivative coupling in the constant-roll","authors":"Naufal Aulia Adam, G. Hikmawan, F. P. Zen","doi":"10.5614/itb.ijp.2022.33.1.2","DOIUrl":"https://doi.org/10.5614/itb.ijp.2022.33.1.2","url":null,"abstract":"Inflation is a theory in cosmology that explains that the early universe experienceda very fast expansion in a very short time and is able to explain some cosmological problemsand the presence of gravitational waves generated during the inflation period. Based on theevent GW170817, it was found that c2t = 1, which indicates that the speed of gravitationalwaves is nearly equal to the speed of light. This contradicts several modified theories of gravity,one of which is the Einstein-Gauss-Bonnet theory. This paper examines the compatibility ofEinstein-Gauss-Bonnet inflation theory with the GW170817 phenomenon, with the addition ofthe Non-minimal derivative coupling term and the constant-roll approach and its characteristics.The formulation of observational quantities is carried out using Horndeski theory and EffectiveField Theory with ADM formalism and the calculations are done numerically. The constantvalues are selected in such a way that the spectral index values and tensor-scalar ratios are closeto the 2018 Planck data. The results found that this theory is compatible with GW170817 withthe influence of Gauss-Bonnet term and constant-roll parameter β most dominant.","PeriodicalId":13535,"journal":{"name":"Indonesian Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83674732","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}

引用次数: 0

Blow-up Dynamics of Higher Dimensional Klein-Gordon Equation with Nonminimal Coupling in Subcritical Case 次临界情况下高维非极小耦合Klein-Gordon方程的爆破动力学

Indonesian Journal of Physics Pub Date : 2022-10-31 DOI: 10.5614/itb.ijp.2022.33.1.5

M. P. Wijayanto, F. Akbar, B. Gunara

引用次数: 0

Study of Entangled K-meson and Its Decoherence 纠缠k介子及其退相干研究

Indonesian Journal of Physics Pub Date : 2022-10-31 DOI: 10.5614/itb.ijp.2022.33.1.4

Abas Syahbana, F. P. Zen, D. Dwiputra

{"title":"Study of Entangled K-meson and Its Decoherence","authors":"Abas Syahbana, F. P. Zen, D. Dwiputra","doi":"10.5614/itb.ijp.2022.33.1.4","DOIUrl":"https://doi.org/10.5614/itb.ijp.2022.33.1.4","url":null,"abstract":"In this paper, entangled K-meson model and decoherence phenomenon in thesystem is studied. Using Lindblad equation, dynamical equation of entangled K-meson systemthat interacts with the environment is obtained. We find that non-Hermitian Hamiltonian ofthe system makes completely positive and trace-preserving map (CPT-map) on the space ofdensity matrix does not satisfy trace preserving properties. We also find that purity of densitymatrix can be less than 1=d which does not satisfy the property of purity. From the dynamicalequation, parameters related to the decoherence of the system, decoherence parameter (λ) andeffective decoherence parameter (ζ), are determined. Using Standard Least-Squares method,we obtain ζ = 0; 13±0; 865. This result is in accordance with references result that use effectivevariance method, ζ = 0; 13±+0 -0;;16 15. We show that ζ = 0; 13±+0 -0;;16 15 corresponds with referencesresult, λ = (1; 84±+2 -2;;50 17) × 10-12 MeV. The value of both parameters are close to zero relativeto ζ = 1 or λ ! 1. It means that the interaction between system and environment doesnot affect the system significantly. Therefore, quantum properties in the system related to theentanglement of the strangeness is preserved.","PeriodicalId":13535,"journal":{"name":"Indonesian Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84956175","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}

引用次数: 1

Thin-shell Solution of Chameleon Mechanism in Brans-Dicke Scalar-Tensor Model Brans-Dicke标量张量模型中变色龙机构的薄壳解

Indonesian Journal of Physics Pub Date : 2022-10-31 DOI: 10.5614/itb.ijp.2022.33.1.1

A. Sutiono, A. Widiyani, Marliana Marliana, G. Hikmawan, A. Suroso, F. P. Zen

引用次数: 0

Thermoelectrics of type-I and type-II nodal line semimetals within the two-band model 双波段模型中i型和ii型节线半金属的热电体

Indonesian Journal of Physics Pub Date : 2022-10-31 DOI: 10.5614/itb.ijp.2022.33.1.6

Jyesta M. Adhidewata, A. R. Nugraha, E. H. Hasdeo, B. Gunara

{"title":"Thermoelectrics of type-I and type-II nodal line semimetals within the two-band model","authors":"Jyesta M. Adhidewata, A. R. Nugraha, E. H. Hasdeo, B. Gunara","doi":"10.5614/itb.ijp.2022.33.1.6","DOIUrl":"https://doi.org/10.5614/itb.ijp.2022.33.1.6","url":null,"abstract":"Metals and semimetals are often considered poor thermoelectric (TE) materials due to their lowSeebeck coefficients. However, we will show that topological semimetals in the class of nodal-linesemimetals (NLSs) may potentially exhibit better performance as TE materials. The NLSs are semimetalswith an intersection between the conduction band and valence band in the forms of a line (thus called thenodal line). We construct a two-band model using an almost-linear conduction and parabolic (or Mexicanhat) valence bands that overlap each other near the band edge to represent a type-I (or type-II) NLS. Wecalculate TE properties of the NLSs using the semiclassical Boltzmann transport theory and the relaxationtime approximation. By varying the band parameters in our model, we find that the type-II NLS generallyhas better TE performance than the type-I NLS. The type-II NLS, in particular, possesses a Seebeckcoefficient with a value possibly larger than twice that of normal metals. The origin of this feature mightbe the presence of a discontinuity in the density of states due to the intersection of the valence andconduction bands.","PeriodicalId":13535,"journal":{"name":"Indonesian Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78091208","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}

引用次数: 0

GW170817 Implementation on Einstein-Gauss-Bonnet Theory with Non Minimal and Non Minimal Derivative Coupling 非极小和非极小导数耦合Einstein-Gauss-Bonnet理论的实现

Indonesian Journal of Physics Pub Date : 2022-10-31 DOI: 10.5614/itb.ijp.2022.33.1.3

Fitri ' Khairunnisa, G. Hikmawan, F. P. Zen

{"title":"GW170817 Implementation on Einstein-Gauss-Bonnet Theory with Non Minimal and Non Minimal Derivative Coupling","authors":"Fitri ' Khairunnisa, G. Hikmawan, F. P. Zen","doi":"10.5614/itb.ijp.2022.33.1.3","DOIUrl":"https://doi.org/10.5614/itb.ijp.2022.33.1.3","url":null,"abstract":"The GW170817 event manifests that gravitational wave velocity is close to thespeed of light. As a result, several theories of gravity are no longer applicable, including EinsteinGauss-Bonnet (EGB) inflation. However, a constraint equation could be applied so that thetheory could produce a viable result. In this study, the EGB inflation is being extended byadding a non-minimal coupling (NMC) and a non-minimal derivative coupling (NMDC). Freeparameters values were evaluated to obtained viability with observational indices. We use powerlaw and exponential Gauss-Bonnet coupling functions. Each model provides observational valuesof ns and r that are compatible with the observations and has its characteristic. It specifiesthe free parameter that controls the alteration of ns and r values. The power-law model iscontrolled by the power m of the Gauss-Bonnet coupling function and the potential integrationconstant, V2. While the exponential model is controlled by the potential integration constant cand the power m of the exponential function. Some approximations do not hold true so that themodels need to be rectified. Apparently, the rectified power-law model is violating null energycondition (NEC), so we also provide the non-violating NEC power-law model.","PeriodicalId":13535,"journal":{"name":"Indonesian Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80625144","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}

引用次数: 0