Kavli Affiliate: Scott A. Hughes | First 5 Authors: Emanuele Berti, Emanuele Berti, , , | Summary: The "ringdown" radiation emitted by oscillating black holes has great scientific potential. By carefully predicting the frequencies and amplitudes of black hole quasinormal modes and comparing them with gravitational-wave data from compact binary mergers we can advance our […]
Kavli Affiliate: Long Zhang | First 5 Authors: Xiao-Dong Lin, Xiao-Dong Lin, , , | Summary: The accurate determination of non-Hermitian (NH) topological invariants plays a central role in the study of NH topological phases. In this work, we propose a general framework for directly measuring NH topological invariants in even-dimensional systems with real line […]
Kavli Affiliate: Mamoru Matsuo | First 5 Authors: , , , , | Summary: We theoretically explore the generation of spin current driven by a temperature gradient in a junction between a chiral insulator and a normal metal. Based on the gyromagnetic response induced by microscopic acoustic-phonon-mediated lattice rotation, we derive a formula for the […]
Kavli Affiliate: Debora Sijacki | First 5 Authors: Roberto Maiolino, Roberto Maiolino, , , | Summary: The recent discovery of a large number of massive black holes within the first two billion years after the Big Bang, as well as their peculiar properties, have been largely unexpected based on the extrapolation of the properties of […]
Kavli Affiliate: Subo Dong | First 5 Authors: Jinxiao Qin, Jinxiao Qin, , , | Summary: Whether the presence of planets affects the lithium (Li) abundance of their host stars is still an open question. To investigate the difference of the Li abundance between planet-host stars (HS) and isolated stars (IS) with no detected planets, […]
Kavli Affiliate: Simeon Hellerman | First 5 Authors: Jahmall Bersini, Jahmall Bersini, , , | Summary: We study the fixed point of the three-dimensional NJL model in a double-scaling limit where both the charge $Q$ and the number of fermion flavors $N$ become large with a fixed ratio $q=Q/(2N)$. While a similar analysis has been […]
Kavli Affiliate: Rainer Spurzem | First 5 Authors: , , , , | Summary: Young star clusters can inherit bulk rotation from the molecular clouds from which they have formed. This rotation can affect the long-term evolution of a star cluster and its constituent stellar populations. In this study, we aim to characterize the effects […]
Kavli Affiliate: Jia Liu | First 5 Authors: Zhiyao Zhang, Zhiyao Zhang, , , | Summary: Actor-critic methods for decentralized multi-agent reinforcement learning (MARL) facilitate collaborative optimal decision making without centralized coordination, thus enabling a wide range of applications in practice. To date, however, most theoretical convergence studies for existing actor-critic decentralized MARL methods are […]
Kavli Affiliate: Jing Wang | First 5 Authors: Jing Wang, Jing Wang, , , | Summary: Let $G$ be a finite abelian group of order $n$, and for each $ain G$ and integer $1le hle n$ let $mathcalF_a(h)$ denote the family of all $h$-element subsets of $G$ whose sum is $a$. A problem posed by […]
Kavli Affiliate: Lile Wang | First 5 Authors: Muxin Liu, Muxin Liu, , , | Summary: Stars with outflows interacting with ambient gas experience accelerations arising from the gravitational feedback induced by the interaction structure. In this work, three-dimensional (3D) local shearing box simulations are performed to investigate the dynamical evolution of a star with […]