Black Holes and Cosmology in Holographic Duality and Gravitational Waves

全息二象性和引力波中的黑洞和宇宙学

• 批准号: 18F18315
• 负责人: 向山 信治
• 金额: $ 1.41万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for JSPS Fellows
• 财政年份: 2018
• 资助国家: 日本
• 起止时间: 2018-11-09 至 2021-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18F18315/
• 关键词: gravitation; cosmology; holographic principle; gravitatioal waves

Two journal papers have been published in FY2020:1.1] In "Universal Upper Bound on the Inflationary Energy Scale from the Trans-Planckian Censorship Conjecture" [Phys. Rev. D 102, 021301 (2020)], we studied the constraint on the inflationary energy scale from the recently proposed Trans-Planckian Censorship Conjecture (TCC). We found a universal upper bound on the inflationary Hubble expansion rate H, which is solely determined by the reheating temperature: H < T0/Tr, where T0 is the photon temperature today. The upper limit can be saturated by a post-inflationary oscillatory stage with the critical equation-of-state parameter w=-1/3, or by an inflation model with multiple stages. In the lowest reheating temperature required for big bang nucleosynthesis, the upper bound on the tensor-to-scalar ratio r at the CMB scales is r < 10^{－8}, which can be realized in some string-inspired inflation models.1.2] In "Notes on the Quantum Corrections of Swampland and Trans-Planckian Censorship Conjecture" [Phys.Lett. B 816 (2021) 136245], we discussed the de Sitter swampland and trans-Planckian censorship conjectures (TCC) from the entropy bound with quantum corrections, namely quantum version of the Bousso bound and energy conditions. We included the typical contributions from the entanglement entropy in quasi-de Sitter spacetime. The TCC is not much corrected, whereas the bounds on de Sitter swampland conjecture from energy conditions can be relaxed due to quantum corrections.

2020财年发表了两篇期刊论文：1.1]在“Trans-Planckian Censorship Conjecture中的通货膨胀能量规模的通用上限”[Phys. Rev. D 102, 021301 (2020)]中，我们研究了通货膨胀的约束从最近提出的跨普朗克审查猜想（TCC）的能量尺度我们发现了一个通用的上限。膨胀哈勃膨胀率 H，仅由再加热温度决定：H < T0/Tr，其中 T0 是当今的光子温度。上限可以通过具有临界状态方程的后膨胀振荡阶段饱和。参数w=-1/3，或者通过多级暴胀模型，在大爆炸核合成所需的最低再加热温度下，张量与标量比r的上限。 CMB尺度为r < 10^{－8}，这可以在一些弦启发的膨胀模型中实现。1.2]在“沼泽地量子修正和跨普朗克审查猜想的注释”中[Phys.Lett.B 816] 2021）136245]，我们讨论了德西特沼泽地和跨普朗克审查猜想（TCC）具有量子修正的熵界，即布索界和能量条件的量子版本，我们包括了准德西特时空中纠缠熵的典型贡献，而 TCC 没有太多修正，而德西特沼泽猜想的能量界。由于量子修正，条件可以放宽。

项目成果

Holographic approach to entanglement entropy in disordered systems

• DOI: 10.1103/physrevd.99.046019
• 发表时间: 2018-03
• 期刊: Physical Review D
• 影响因子: 5
• 作者: R. Narayanan;Chanyong Park;Yun-Long Zhang

Bell inequality in the holographic EPR pair

• DOI: 10.1016/j.physletb.2019.02.012
• 发表时间: 2016-12
• 期刊: Physics Letters B
• 影响因子: 4.4
• 作者: Jiunn-Wei Chen;Sichun Sun;Yun-Long Zhang

Notes on quantum corrections of swampland and trans-Planckian censorship conjectures

• DOI: 10.1016/j.physletb.2021.136245
• 发表时间: 2019-12
• 期刊: Physics Letters B
• 影响因子: 4.4
• 作者: Sichun Sun;Yun-Long Zhang

Gravitational Waves and Possible Fast Radio Bursts from Axion Clumps

• DOI: 10.1103/physrevd.104.103009
• 发表时间: 2020-03
• 期刊: arXiv: High Energy Physics - Phenomenology
• 作者: Sichun Sun;Yun-Long Zhang

Holographic model of the dark fluid in late time universe

宇宙晚期暗流体的全息模型

• 发表时间: 2019
• 作者: Narayanan Rajesh;Park Chanyong;Zhang Yun-Long;Yun-Long Zhang;Zhang Yun-Long
• 通讯作者: Zhang Yun-Long