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Progress of Theoretical Physics最新文献

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Total Conserved Charges of Lense-Thirring Spacetime in Gravity Theory with Diffeomorphism and Local Lorentz Symmetry 微分同胚和局部洛伦兹对称引力理论中透镜- thirring时空的总守恒电荷
Progress of Theoretical Physics Pub Date : 2012-10-01 DOI: 10.1143/PTP.128.767
G. Nashed
{"title":"Total Conserved Charges of Lense-Thirring Spacetime in Gravity Theory with Diffeomorphism and Local Lorentz Symmetry","authors":"G. Nashed","doi":"10.1143/PTP.128.767","DOIUrl":"https://doi.org/10.1143/PTP.128.767","url":null,"abstract":"The approach of invariant conserved currents generated by an arbitrary vector field which generates a diffeomorphism on the spacetime, in the context of gravitational theory with general coordinate transformation and local Lorentz symmetry has been employed. Three kinds of conserved charges are computed for four tetrads spacetime reproducing Lense-Thirring (LT) metric, which is an approximate solution of the Einstein field equations. Some tetrads give the well known charges and others give in addition to the anomalous charges a divergent quantity. Therefore, regularized expressions, i.e., new local Lorentz transformations are used to get the physical results. Subject Index: 105, 451, 453","PeriodicalId":49658,"journal":{"name":"Progress of Theoretical Physics","volume":"128 1","pages":"767-783"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1143/PTP.128.767","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64016408","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
Ward Identity as Exact Transport Equation Ward恒等式为精确输运方程
Progress of Theoretical Physics Pub Date : 2012-10-01 DOI: 10.1143/PTP.128.785
Y. Yamane, M. Itoh
{"title":"Ward Identity as Exact Transport Equation","authors":"Y. Yamane, M. Itoh","doi":"10.1143/PTP.128.785","DOIUrl":"https://doi.org/10.1143/PTP.128.785","url":null,"abstract":"We show that the exact transport equation of interacting fermions is nothing but an alternative form of the Ward identity. It is close to that derived diagrammatically by ´ Eliashberg, but along with the complete collision integral and full renormalizations. We further discuss the hidden divergence in conductivity in the conventional microscopic Fermi liquid theory. The exact transport equation does not bring this divergence, incorporating the particleparticle and hole-hole excitations. Subject Index: 052, 062, 323, 356","PeriodicalId":49658,"journal":{"name":"Progress of Theoretical Physics","volume":"13 1","pages":"785-794"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1143/PTP.128.785","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64016467","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
Subbarrier Fusion Reactions and Many-Particle Quantum Tunneling 亚势垒聚变反应和多粒子量子隧穿
Progress of Theoretical Physics Pub Date : 2012-09-28 DOI: 10.1143/PTP.128.1061
K. Hagino, N. Takigawa
{"title":"Subbarrier Fusion Reactions and Many-Particle Quantum Tunneling","authors":"K. Hagino, N. Takigawa","doi":"10.1143/PTP.128.1061","DOIUrl":"https://doi.org/10.1143/PTP.128.1061","url":null,"abstract":"Low-energy heavy-ion fusion reactions are governed by quantum tunneling through the Coulomb barrier formed by the strong cancellation of the repulsive Coulomb force with the attractive nuclear interaction between the colliding nuclei. Extensive experimental as well as theoretical studies have revealed that fusion reactions are strongly influenced by couplings of the relative motion of the colliding nuclei to several nuclear intrinsic motions. Heavy-ion subbarrier fusion reactions thus provide a good opportunity to address the general problem of quantum tunneling in the presence of couplings, which has been a popular subject in recent decades in many branches of physics and chemistry. Here, we review theoretical aspects of heavy-ion subbarrier fusion reactions from the viewpoint of quantum tunneling in systems with many degrees of freedom. Particular emphases are put on the coupled-channels approach to fusion reactions and the barrier distribution representation for multichannel penetrability. We also discuss an application of the barrier distribution method to elucidate the mechanism of the dissociative adsorption of H2 molecules in surface science. Subject Index: 062, 211, 223, 226, 330","PeriodicalId":49658,"journal":{"name":"Progress of Theoretical Physics","volume":"128 1","pages":"1061-1106"},"PeriodicalIF":0.0,"publicationDate":"2012-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1143/PTP.128.1061","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64011699","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: 190
Separation of Chiral and Deconfinement Phase Transitions in Curved Space-Time 弯曲时空中手性相变与非定义相变的分离
Progress of Theoretical Physics Pub Date : 2012-09-13 DOI: 10.1143/PTP.128.925
S. Sasagawa, Hidekazu Tanaka
{"title":"Separation of Chiral and Deconfinement Phase Transitions in Curved Space-Time","authors":"S. Sasagawa, Hidekazu Tanaka","doi":"10.1143/PTP.128.925","DOIUrl":"https://doi.org/10.1143/PTP.128.925","url":null,"abstract":"We calculated the chiral condensate and th ed ressed Polyakov loop in the space-time R × S 3 and R × H 3 . The chiral condensate is the order parameter for the chiral phase transition, whereas the dressed Polyakov loop is the order parameter for the deconfinement phase transition. When there is a current mass, critical points for the chiral and deconfinement phase transitions are different in the crossover region. We show that the difference is changed by the gravitational effect. Subject Index: 160, 169, 436","PeriodicalId":49658,"journal":{"name":"Progress of Theoretical Physics","volume":"128 1","pages":"925-939"},"PeriodicalIF":0.0,"publicationDate":"2012-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1143/PTP.128.925","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64016379","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: 3
Effects of Final-State Interactions in B0→K+K- Decay B0→K+K-衰变中末态相互作用的影响
Progress of Theoretical Physics Pub Date : 2012-09-01 DOI: 10.1143/PTP.128.477
B. Mohammadi, H. Mehraban
{"title":"Effects of Final-State Interactions in B0→K+K- Decay","authors":"B. Mohammadi, H. Mehraban","doi":"10.1143/PTP.128.477","DOIUrl":"https://doi.org/10.1143/PTP.128.477","url":null,"abstract":"The decay of the B meson to the K and K− mesons is a pure annihilation decay; for this reason, in the framework of the quantum chromodynamics factorization (QCDF) approach, this decay has a small amplitude and a small branching ratio. In this study, we find that, before the K and K− mesons are produced in the final states, pair mesons such as ππ(ρρ), π+π−(ρ+ρ−), K0K0(K0∗K0∗), D0D0(D0∗D0∗), D s D − s (D +∗ s D −∗ s ), φφ and ρφ are produced. The intermediate-state mesons via the exchange of K+(∗), K0(∗), π−(ρ−), D+(∗) s , D0(∗) and K−(∗) mesons go to the K and K− final-state mesons. However, we calculate the B → K+K− decay in two different frameworks. The first framework is the QCDF method and the second one is the use of the final-state interaction (FSI) effects. The experimental branching ratios of B → K+K− decay are 1.3 and 2.3 × 10−7, and our results obtained by the QCDF method and FSI are 0.11 × 10−7 and 0.09 ∼ 3.21 × 10−7, respectively.","PeriodicalId":49658,"journal":{"name":"Progress of Theoretical Physics","volume":"128 1","pages":"477-487"},"PeriodicalIF":0.0,"publicationDate":"2012-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1143/PTP.128.477","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64015074","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: 11
A Boundary Integral SPH Formulation --- Consistency and Applications to ISPH and WCSPH --- 边界积分SPH公式——一致性及其在ISPH和WCSPH中的应用——
Progress of Theoretical Physics Pub Date : 2012-09-01 DOI: 10.1143/PTP.128.439
F. Macià, L. González, J. Cercos-Pita, A. Souto-Iglesias
{"title":"A Boundary Integral SPH Formulation --- Consistency and Applications to ISPH and WCSPH ---","authors":"F. Macià, L. González, J. Cercos-Pita, A. Souto-Iglesias","doi":"10.1143/PTP.128.439","DOIUrl":"https://doi.org/10.1143/PTP.128.439","url":null,"abstract":"One of the historical problems appearing in SPH formulations is the inconsistencies coming from the inappropriate implementation of boundary conditions. In this work, this problem has been investigated; instead of using typical methodologies such as extended domains with ghost or dummy particles where severe inconsistencies are found, we included the boundary terms that naturally appear in the formulation. First, we proved that in the 1D smoothed continuum formulation, the inclusion of boundary integrals allows for a consistent O (h) formulation close to the boundaries. Second, we showed that the corresponding discrete version converges to a certain solution when the discretization SPH parameters tend to zero. Typical tests with the first and second derivative operators confirm that this boundary condition implementation works consistently. The 2D Poisson problem, typically used in ISPH, was also studied, obtaining consistent results. For the sake of completeness, two practical applications, namely, the duct flow and a sloshing tank, were studied with the results showing a rather good agreement with former experiments and previous results. Subject Index: 024","PeriodicalId":49658,"journal":{"name":"Progress of Theoretical Physics","volume":"128 1","pages":"439-462"},"PeriodicalIF":0.0,"publicationDate":"2012-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1143/PTP.128.439","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64015410","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: 54
Charge-Exchange Excitations with Skyrme Interactions in a Separable Approximation 具有Skyrme相互作用的电荷交换激发的可分离近似
Progress of Theoretical Physics Pub Date : 2012-09-01 DOI: 10.1143/PTP.128.489
A. Severyukhin, V. Voronov, N. Giai
{"title":"Charge-Exchange Excitations with Skyrme Interactions in a Separable Approximation","authors":"A. Severyukhin, V. Voronov, N. Giai","doi":"10.1143/PTP.128.489","DOIUrl":"https://doi.org/10.1143/PTP.128.489","url":null,"abstract":"Starting from a Skyrme interaction we propose an extension of the finite rank separable approximation for the case of charge-exchange nuclear modes. This approximation enables one to reduce considerably the dimensions of the matrices that must be diagonalized to perform QRPA calculations in very large configuration spaces. First, we check that the approximation reproduces reasonably well the full charge-exchange RPA results of the spindipole resonances in the nuclei 90 Zr and 132 Sn. The approach is then applied to the study of the Gamow-Teller and the spin-dipole resonances in the neutron-rich Cd isotopes, within the quasiparticle random phase approximation. Subject Index: 210, 213","PeriodicalId":49658,"journal":{"name":"Progress of Theoretical Physics","volume":"128 1","pages":"489-506"},"PeriodicalIF":0.0,"publicationDate":"2012-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1143/PTP.128.489","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64015145","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: 18
A New Point of View on General Kaluza-Klein Theories 关于一般Kaluza-Klein理论的新观点
Progress of Theoretical Physics Pub Date : 2012-09-01 DOI: 10.1143/PTP.128.541
A. Bejancu
{"title":"A New Point of View on General Kaluza-Klein Theories","authors":"A. Bejancu","doi":"10.1143/PTP.128.541","DOIUrl":"https://doi.org/10.1143/PTP.128.541","url":null,"abstract":"","PeriodicalId":49658,"journal":{"name":"Progress of Theoretical Physics","volume":"128 1","pages":"541-585"},"PeriodicalIF":0.0,"publicationDate":"2012-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1143/PTP.128.541","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64015860","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: 9
Level Spacings of Parametric Chiral Random Matrices and Two-Color QCD with Twisted Boundary Condition 参数手性随机矩阵的水平间距与具有扭曲边界条件的双色QCD
Progress of Theoretical Physics Pub Date : 2012-08-19 DOI: 10.1143/PTP.128.1283
S. Nishigaki
{"title":"Level Spacings of Parametric Chiral Random Matrices and Two-Color QCD with Twisted Boundary Condition","authors":"S. Nishigaki","doi":"10.1143/PTP.128.1283","DOIUrl":"https://doi.org/10.1143/PTP.128.1283","url":null,"abstract":"We evaluate the level spacing and smallest eigenvalue distributions of chiral random matrix ensembles transiting from symplectic or orthogonal to unitary symmetry classes with a crossover parameter ρ. As expected from the effective σ model description, these results can be fitted perfectly to the fundamental or adjoint staggered Dirac spectrum of SU(2) quenched lattice gauge theory under the imaginary chemical potential (twisting) μ .T he linear dependence of the parameter ρ on μ determines the pion decay constant F as its proportionality constant.","PeriodicalId":49658,"journal":{"name":"Progress of Theoretical Physics","volume":"128 1","pages":"1283-1292"},"PeriodicalIF":0.0,"publicationDate":"2012-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1143/PTP.128.1283","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64012038","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: 5
Toward an Understanding of Short Distance Repulsions among Baryons in QCD--- NBS Wave Functions and Operator Product Expansion --- QCD—NBS波函数中重子间短距离排斥的理解与算子积展开
Progress of Theoretical Physics Pub Date : 2012-08-07 DOI: 10.1143/PTP.128.1269
S. Aoki, J. Balog, P. Weisz
{"title":"Toward an Understanding of Short Distance Repulsions among Baryons in QCD--- NBS Wave Functions and Operator Product Expansion ---","authors":"S. Aoki, J. Balog, P. Weisz","doi":"10.1143/PTP.128.1269","DOIUrl":"https://doi.org/10.1143/PTP.128.1269","url":null,"abstract":"We report on our recent attempts to determine the short distance behaviors of general 2baryon and 3-baryon forces, which are defined from the Nambu-Bethe-Salpeter (NBS) wave function, by using the operator product expansion and a renormalization group analysis in QCD. We have found that the repulsion at short distance increases as the number of valence quarks increases or when the number of different flavors involved decreases. This global tendency suggests a Pauli suppression principle among quark fields at work. Subject Index: 164, 165, 200, 234 §1. Motivation","PeriodicalId":49658,"journal":{"name":"Progress of Theoretical Physics","volume":"128 1","pages":"1269-1282"},"PeriodicalIF":0.0,"publicationDate":"2012-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1143/PTP.128.1269","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64011827","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: 7
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