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On information paradox and the fate of black holes 论信息悖论和黑洞的命运
IF 1.4 4区 物理与天体物理
Modern Physics Letters A Pub Date : 2024-03-22 DOI: 10.1142/s0217732324500251
A. Morozov
{"title":"On information paradox and the fate of black holes","authors":"A. Morozov","doi":"10.1142/s0217732324500251","DOIUrl":"https://doi.org/10.1142/s0217732324500251","url":null,"abstract":"<p>A sketchy review of the “island” paradigm in black hole evaporation theory, which actually brings us back to the old idea that interior of black hole decouples from our universe after Page time, so that Hawking radiation is entangled with emerging new universe, thus leaving no room for the information paradox. Instead this provides a self-consistent description of multiverse, where every black hole in a parent universe is a white hole — the origin — of a new one.</p>","PeriodicalId":18752,"journal":{"name":"Modern Physics Letters A","volume":"16 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140203453","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
On Mössbauer rotor effect, clock synchronization and third postulate of relativity 关于莫斯鲍尔转子效应、时钟同步和相对论第三公设
IF 1.4 4区 物理与天体物理
Modern Physics Letters A Pub Date : 2024-03-11 DOI: 10.1142/s0217732324500147
Christian Corda
{"title":"On Mössbauer rotor effect, clock synchronization and third postulate of relativity","authors":"Christian Corda","doi":"10.1142/s0217732324500147","DOIUrl":"https://doi.org/10.1142/s0217732324500147","url":null,"abstract":"<p>The Mössbauer rotor effect recently gained a renewed interest due to the discovery and explanation of an additional effect of clock synchronization which has been missed for about 50 years, i.e. starting from a famous book of Pauli, till some more recent experimental analyses. The theoretical explanation of such an additional effect is due to some recent papers in the general relativistic framework. Here, we show that the additional effect of clock synchronization can be calculated in another way via the third postulate of relativity.</p>","PeriodicalId":18752,"journal":{"name":"Modern Physics Letters A","volume":"28 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140196296","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
Prediction on the alpha decay half-lives of 223−243Am isotopes 关于 223-243Am 同位素阿尔法衰变半衰期的预测
IF 1.4 4区 物理与天体物理
Modern Physics Letters A Pub Date : 2024-03-11 DOI: 10.1142/s021773232450010x
M. Hosseinian Rostami, S. M. Motevalli, N. Amrani, S. S. Hosseini
{"title":"Prediction on the alpha decay half-lives of 223−243Am isotopes","authors":"M. Hosseinian Rostami, S. M. Motevalli, N. Amrani, S. S. Hosseini","doi":"10.1142/s021773232450010x","DOIUrl":"https://doi.org/10.1142/s021773232450010x","url":null,"abstract":"<p>We studied the alpha decay half-life of Americium isotopes (<span><math altimg=\"eq-00002.gif\" display=\"inline\" overflow=\"scroll\"><mstyle><mtext mathvariant=\"normal\">Z</mtext></mstyle><mo>=</mo><mn>9</mn><mn>5</mn></math></span><span></span>) with mass numbers ranging from 223 to 243. Our investigation employed the Coulomb and proximity potential model (CPPM), in addition to alternative analytical and semiempirical formulas. The calculations took into <i>account</i> both experimental and theoretical Q-values, as well as the total alpha kinetic energy. We analyzed the behavior of the hindrance factor concerning changes in the mass numbers of parent nuclei within the range of 223–243, and also examined the impact of magic numbers associated with closed shells. To evaluate the accuracy of our findings, we utilized the SemFIS, UNIV, and Royer formulas to make predictions, which were then compared to the existing experimental data.</p>","PeriodicalId":18752,"journal":{"name":"Modern Physics Letters A","volume":"293 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140203696","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
Thermodynamics of black holes charged with a conformally invariant electrodynamics in (n+1)-dimensional scalar-tensor theory (n+1)维标量张量理论中带保角不变电动力学的黑洞热力学
IF 1.4 4区 物理与天体物理
Modern Physics Letters A Pub Date : 2024-03-11 DOI: 10.1142/s0217732324500093
M. Dehghani
{"title":"Thermodynamics of black holes charged with a conformally invariant electrodynamics in (n+1)-dimensional scalar-tensor theory","authors":"M. Dehghani","doi":"10.1142/s0217732324500093","DOIUrl":"https://doi.org/10.1142/s0217732324500093","url":null,"abstract":"<p>The Jordan frame (JF) field equations of scalar-tensor (ST) theory are strongly coupled and, the exact solutions cannot be obtained easily. By using the conformal transformation (CT), the ST action has been translated to the Einstein frame (EF) where the theory is known as the Einstein-dilaton (Ed) gravity. Also, an <span><math altimg=\"eq-00002.gif\" display=\"inline\" overflow=\"scroll\"><mo stretchy=\"false\">(</mo><mi>n</mi><mo>+</mo><mn>1</mn><mo stretchy=\"false\">)</mo></math></span><span></span>-dimensional electromagnetic Lagrangian has been introduced which remains invariant under CT. The Ed-conformal-invariant field equations, which are confronted with the mathematical indeterminacy problem, have been solved by use of a power-law ansatz function. We have introduced two classes of black holes (BHs) which are asymptotically non-flat and non-AdS. The Ed exact solutions can produce BHs with three, two, one and without horizons. By calculating the thermodynamic quantities, and making use of the Smarr mass relation it has been shown that the thermodynamical first law is valid in the EF. Thermal stability of Ed BHs has been analyzed by considering specific heats, thermodynamic Ricci scalars and Gibbs free energies, separately. Then using the inverse CTs, the ST exact solutions have been obtained which show two classes of horizonless, one-horizon, two-horizon and three-horizon BHs. We found that CTs preserve thermodynamic quantities and, thermodynamic properties of the ST BHs are just like those of Ed ones.</p>","PeriodicalId":18752,"journal":{"name":"Modern Physics Letters A","volume":"67 4 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140203531","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
Heavy hexaquarks in the flux tube model 通量管模型中的重六夸克
IF 1.4 4区 物理与天体物理
Modern Physics Letters A Pub Date : 2024-03-11 DOI: 10.1142/s0217732324500081
D. G. Sindhu, Akhilesh Ranjan, Hemwati Nandan, V. Sharma
{"title":"Heavy hexaquarks in the flux tube model","authors":"D. G. Sindhu, Akhilesh Ranjan, Hemwati Nandan, V. Sharma","doi":"10.1142/s0217732324500081","DOIUrl":"https://doi.org/10.1142/s0217732324500081","url":null,"abstract":"<p>Hexaquarks are one of the currently emerging topics in both experimental and theoretical high energy physics. Hexaquarks have been examined in relation to particle physics, however, there are still some research and theoretical conjectures surrounding their relationship to dark matter. Due to some experimental discoveries, it has attracted much interest and also resulted in new theoretical models to study the properties of these states. In this work, Regge trajectories of some hexaquark states are compared with tetraquark and pentaquark states. The study is mainly concentrated on fully heavy hexaquark states. The mass spectra of these hexaquark states have also been investigated and the results are compared with other theoretical works. Our findings agree well with those of other researchers.</p>","PeriodicalId":18752,"journal":{"name":"Modern Physics Letters A","volume":"1 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140203461","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
Quantifying coherence via the generalized Wigner–Yanase–Dyson skew information 通过广义 Wigner-Yanase-Dyson 倾斜信息量化相干性
IF 1.4 4区 物理与天体物理
Modern Physics Letters A Pub Date : 2024-03-11 DOI: 10.1142/s0217732324500111
Y. J. Fan, X. Guo, Z. H. Guo, M. Zhang
{"title":"Quantifying coherence via the generalized Wigner–Yanase–Dyson skew information","authors":"Y. J. Fan, X. Guo, Z. H. Guo, M. Zhang","doi":"10.1142/s0217732324500111","DOIUrl":"https://doi.org/10.1142/s0217732324500111","url":null,"abstract":"<p>Quantum coherence is an important feature that distinguishes quantum mechanics from classical physics. In this paper, we study the coherence of a quantum state with respect to a quantum channel, and introduce a coherence measure in terms of the generalized Wigner–Yanase–Dyson skew information. The basic properties and operational significance of the measure are expounded in detail, which shows that it is indeed a veritable quantity and satisfies many desirable conditions intuitively required for the coherence measures. We illustrate the significance of characterizing channels from the coherence perspective through some examples. Finally, we consider the average coherence of a state based on the generalized Wigner–Yanase–Dyson skew information with respect to any complete mutually unbiased bases in prime power dimensional systems, as well as with respect to all orthonormal bases, and show that these two averages are equivalent since they both can be seen as the coherence of the quantum state with respect to the depolarizing quantum channel.</p>","PeriodicalId":18752,"journal":{"name":"Modern Physics Letters A","volume":"176 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140196322","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
Supersymmetric behavior of polarized electromagnetic waves in anisotropic media 各向异性介质中偏振电磁波的超对称行为
IF 1.4 4区 物理与天体物理
Modern Physics Letters A Pub Date : 2024-03-11 DOI: 10.1142/s0217732324500135
Felipe A. Asenjo, Sergio A. Hojman, Braulio M. Villegas-Martínez, Héctor M. Moya-Cessa, Francisco Soto-Eguibar
{"title":"Supersymmetric behavior of polarized electromagnetic waves in anisotropic media","authors":"Felipe A. Asenjo, Sergio A. Hojman, Braulio M. Villegas-Martínez, Héctor M. Moya-Cessa, Francisco Soto-Eguibar","doi":"10.1142/s0217732324500135","DOIUrl":"https://doi.org/10.1142/s0217732324500135","url":null,"abstract":"<p>A medium with specific anisotropic refractive indices can induce a supersymmetric behavior in the propagation of polarized electromagnetic waves, in an analog fashion to a quantum mechanical system. The polarizations of the wave are the ones which behave as superpartners from each other. For this to happen, the anisotropy of the medium must be transverse to the direction of propagation of the wave, with different refractive indices along the direction of each polarization, being in this way a biaxial medium. These refractive indices must be complex and follow a very specific relation in order to trigger the supersymetric response of the electromagnetic wave, each of them with spatial dependence on the longitudinal (propagation) direction of the wave. In this form, in these materials, different polarized light can be used to test supersymmetry in an optical fashion.</p>","PeriodicalId":18752,"journal":{"name":"Modern Physics Letters A","volume":"2015 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140196588","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
Parisi–Wu quantization, CP violation and beyond the standard model 帕里西乌量子化、CP 违背和超越标准模型
IF 1.4 4区 物理与天体物理
Modern Physics Letters A Pub Date : 2024-02-21 DOI: 10.1142/s0217732324500123
A. K. Kapoor
{"title":"Parisi–Wu quantization, CP violation and beyond the standard model","authors":"A. K. Kapoor","doi":"10.1142/s0217732324500123","DOIUrl":"https://doi.org/10.1142/s0217732324500123","url":null,"abstract":"<p>The Parisi–Wu scheme of quantization opens up the possibility of using anomalous fermionic gauge theories. An analysis of ultra-violet divergences reveals that the structure of counter terms is different from what is expected in conventional quantization schemes. In this paper, it is argued that there exists a possible mechanism of CP violation that requires at least three generations of quarks, a result well known from a phenomenological analysis of mass mixing of quarks. A few observations on possible ways of going beyond the Standard Model are included.</p>","PeriodicalId":18752,"journal":{"name":"Modern Physics Letters A","volume":"29 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140196392","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
The competition between α-decay and spontaneous fission for even–even isotopes of superheavy nuclei in the range 106≤Z≤124 106≤Z≤124 范围内超重原子核偶偶数同位素的 α 衰变与自发裂变之间的竞争关系
IF 1.4 4区 物理与天体物理
Modern Physics Letters A Pub Date : 2024-01-10 DOI: 10.1142/s0217732323501766
M. Pahlavani, F. Ahmadvand
{"title":"The competition between α-decay and spontaneous fission for even–even isotopes of superheavy nuclei in the range 106≤Z≤124","authors":"M. Pahlavani, F. Ahmadvand","doi":"10.1142/s0217732323501766","DOIUrl":"https://doi.org/10.1142/s0217732323501766","url":null,"abstract":"The [Formula: see text]-decay and spontaneous fission (SF) half-lives for even–even isotopes of superheavy nuclei in the range [Formula: see text] are predicted using nuclear double-folding and Coulomb potentials. The [Formula: see text]-decay half-lives are computed based on WKB approximation for tunneling probability through potential barrier. The half-lives of SF have also been calculated using a semi-empirical relation constructed by Santhosh et al. [Nucl. Phys. A 832, 220 (2009)]. Our calculated half-lives of cold SF and [Formula: see text]-decay are compared with the available experimental data. This comparison indicates that our obtained half-lives are in good agreement with the available experimental data. The competition between [Formula: see text]-decay and SF is also analyzed in detail and the decay modes are predicted for the unknown cases. Variation of [Formula: see text]-decay and SF half-lives with mass number of the parent isotopes for each nucleus revealed the major role played with shell effect.","PeriodicalId":18752,"journal":{"name":"Modern Physics Letters A","volume":"11 12","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139439797","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
Behavior of spin-0 scalar particles in Eddington-inspired Born–Infeld gravity global monopole with harmonic oscillator potential 自旋-0 标量粒子在具有谐振子势的爱丁顿启发玻恩-因费尔德引力全局单极中的行为
IF 1.4 4区 物理与天体物理
Modern Physics Letters A Pub Date : 2024-01-10 DOI: 10.1142/s0217732323501870
Faizuddin Ahmed, Abdullah Güvendi
{"title":"Behavior of spin-0 scalar particles in Eddington-inspired Born–Infeld gravity global monopole with harmonic oscillator potential","authors":"Faizuddin Ahmed, Abdullah Güvendi","doi":"10.1142/s0217732323501870","DOIUrl":"https://doi.org/10.1142/s0217732323501870","url":null,"abstract":"In this paper, we investigate the behavior of a scalar bosonic field within the backdrop of Eddington-inspired Born–Infeld gravity with a global monopole configuration. Additionally, we consider the presence of both scalar and vector potentials. To introduce the scalar potential, we perform a transformation on the mass term, replacing [Formula: see text] with [Formula: see text]. For the vector potential, we apply a minimal coupling scheme, transforming [Formula: see text] within the relativistic Klein–Gordon equation. We opt for a harmonic oscillator scenario where the scalar and vector potentials are equal, i.e. [Formula: see text]. Through this setup, we analytically solve the wave equation using the confluent Heun equation form. Subsequently, we delve into the quantum system in the absence of any potential, determining the permissible values for bound-state relativistic energy levels and the scalar field’s wave function. Our analysis reveals that the energy levels and wave function are influenced by various parameters present in the eigenvalue expression.","PeriodicalId":18752,"journal":{"name":"Modern Physics Letters A","volume":"5 30","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139439761","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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