首页|Primordial black holes and curvature perturbations from false vacuum islands

Primordial black holes and curvature perturbations from false vacuum islands

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Recently,much attention has been focused on the false vacuum islands that are flooded by an expanding ocean of true-vacuum bubbles slightly later than most of the other parts of the world.These delayed decay regions will accumulate locally larger vacuum energy density by staying in the false vacuum longer than those already transited into the true vacuum.A false vacuum island with thus acquired density contrast of a super-horizon size will evolve locally from radiation dominance to vacuum dom-inance,creating a local baby Universe that can be regarded effectively as a local closed Universe.If such density contrasts of super-horizon sizes can ever grow large enough to exceed the threshold of gravitational collapse,primordial black holes will form similar to those collapsing curvature perturbations on super-horizon scales induced by small-scale enhancements during inflation.If not,such density contrasts can still induce curvature perturbations potentially observable today.In this paper,we revisit and elaborate on the generations of primordial black holes and curvature perturbations from delayed-decayed false vacuum islands during asynchronous first-order phase transitions with fitting formulas convenient for future model-independent studies.

first-order phase transitionsprimordial black holescurvature perturbations

Rong-Gen Cai、Yu-Shi Hao、Shao-Jiang Wang

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School of Physical Science and Technology,Ningbo University,Ningbo 315211,China

CAS Key Laboratory of Theoretical Physics,Institute of Theoretical Physics,Chinese Academy of Sciences,Beijing 100190,China

School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China

Asia Pacific Center for Theoretical Physics,Pohang 37673,Republic of Korea

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National Key Research and Development Program of ChinaNational Key Research and Development Program of ChinaNational Key Research and Development Program of ChinaNational Natural science Foundation of ChinaNational Natural science Foundation of ChinaNational Natural science Foundation of ChinaNational Natural science Foundation of ChinaNational Natural science Foundation of ChinaStrategic Priority Research Program of the Chinese Academy of Sciences(CAS)Strategic Priority Research Program of the Chinese Academy of Sciences(CAS)Key Research Program of the CASKey Research Program of Frontier Sciences of CASScience Research Grants from the China Manned Space Project

2021YFC22030042021YFA07183042020YFC22015021210534412235019118215051199105211947302XDB23030100XDA15020701XDPB15CMS-CSST-2021-B01

2024

10.1007/s11433-024-2416-3

中国科学:物理学 力学 天文学(英文版)
中国科学院

中国科学:物理学 力学 天文学(英文版)

CSTPCD
影响因子：0.91
ISSN：1674-7348
年,卷(期)：2024.67(9)