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In this paper, we calculate the off-shell superpotential of two Calabi-Yau manifolds with three parameters by integrating the period of the subsystem. We also obtain the Ooguri-Vafa invariants with open mirror symmetry. 相似文献
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同时考虑真实的动量相关势和介质中核子-核子碰撞截面来求解BUU方程.在入射能量EL/A=100、200、400和800MeV时,系统地计算和分析了核反应Ca40+Ca40在各种碰撞参数下的熵产生和碰撞随时间的变化过程.结果表明:动量相关势和介质效应对熵和碰撞数的影响是明显的,而且这种影响对碰撞参数和入射能量的依赖比较敏感,特别是熵产生和碰撞数在各种条件下随时间的演化过程反映了热核形成的动力学过程. 相似文献
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We calculate the D-brane superpotentials for two compact Calabi-Yau manifolds X14(1,1,2,3,7) and X8(1, 1, 1, 2, 3) which are of non-Fermat type in the type II string theory. By constructing the open mirror symmetry,we also compute the Ooguri-Vafa invariants, which are related to the open Gromov-Witten invariants. 相似文献
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In this letter we give another representation of the β form in the inhomogeneous Picard-Fuchs equation for open topological string for some one-parameter Calabi-Yau hypersurfaces in weighted projective spaces. Furthermore, the corresponding domain wall tensions calculated by using these β forms are consistent with the results that appear in literature. The β form is essential for the calculation of the D-brane domain wall tension, and a convenient choice of β forms should simplify the calculation. The freedom of the choice of β forms shows some symmetries in Calabi-Yau space. 相似文献
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In this paper we study the parallel phase and the coincident phase of D-brane systems with the compactification of one closed modulus. D-brane systems with two phases are described by different 4-folds in terms of Type-Ⅱ/F-theory duality, and the phase transitions are related by the blow-up from a 4-fold with singularities to a 4-fold without. In terms of gauge theory, the phase transition corresponds to the enhancement of gauge group U(1)×U(1)→U(2) connecting the Coulomb branch and the Higgs branch. For the sextic and octic with two D-branes,using mirror symmetry and Type-Ⅱ/F theory duality, A-model superpotentials are obtained from the B-model side for the two phases, and the U(1) Ooguri-Vafa invariants for the parallel phase and U(2) Ooguri-Vafa invariants for the coincident phase are extracted from the A-model superpotential. The difference between the invariants of the two phases is evidence of the phase transition between the Coulomb branch and the Higgs branch. 相似文献
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在BUU方程中引入真实的与动量和密度相关的平均场及介质中与密度和能量相关的核子-核子碰撞截面.在各种入射能量和碰撞参数下,对于反应Ca40+Ca40求解BUU方程.系统地计算和分析了集体流随时间变化的过程,结果表明:动量相关势和介质效应对集体流都有明显的影响,而且这种影响都有明显的能量和碰撞参数相关性. 相似文献
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