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We present three epochs of VLBA observations of Galactic HI absorption toward the quasar 3C~138 with resolutions of 20 mas (~ 10 AU). This analysis includes VLBA data from observations in 1999 and 2002 along with a reexamination of 1995…

Astrophysics · Physics 2008-11-26 C. L. Brogan , B. A. Zauderer , T. J. Lazio , W. M. Goss , C. D. De Pree , M. D. Fasion

We compare dense clumps and cores in a numerical simulation of molecular clouds (MCs) undergoing global hierarchical collapse (GHC) to observations in two MCs at different evolutionary stages, the Pipe and the G14.225 clouds, to test the…

Astrophysics of Galaxies · Physics 2020-11-11 Vianey Camacho , Enrique Vázquez-Semadeni , Aina Palau , Gemma Busquet , Manuel Zamora-Avilés

We present a model for the distribution of void sizes and its evolution in the context of hierarchical scenarios of gravitational structure formation. We find that at any cosmic epoch the voids have a size distribution which is well-peaked…

Astrophysics · Physics 2008-11-26 Ravi K. Sheth , Rien van de Weygaert

It is conjectured that the average energy provides an upper bound on the rate at which the complexity of a holographic boundary state grows. In this paper, we perturb a holographic CFT by a relevant operator with a time-dependent coupling,…

High Energy Physics - Theory · Physics 2018-05-30 Mudassir Moosa

We model the dynamical evolution of star forming regions with a wide range of initial properties. We follow the evolution of the regions' substructure using the Q-parameter, we search for dynamical mass segregation using the Lambda_MSR…

Astrophysics of Galaxies · Physics 2015-06-17 Richard J. Parker , Nicholas J. Wright , Simon P. Goodwin , Michael R. Meyer

We investigate the formation, growth, merger history, movement, and destruction of cosmic voids detected via the watershed transform code VIDE in a cosmological N-body dark matter {\Lambda}CDM simulation. By adapting a method used to…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-19 P. M. Sutter , Pascal Elahi , Bridget Falck , Julian Onions , Nico Hamaus , Alexander Knebe , Chaichalit Srisawat , Aurel Schneider

We explore the generalized holographic complexity of odd-dimensional Myers-Perry asymptotically Anti-de Sitter (MP-AdS) black holes with equal angular momenta within the ``complexity equals anything'' proposal. We begin by determining the…

High Energy Physics - Theory · Physics 2024-09-16 Ming Zhang , Jia-Long Sun , Robert B. Mann

We study the subregion complexity in a semi-analytical holographic QCD model. Two cases with different warped factor are considered and both can realize confinement-deconfinement transition. By studying the behavior of the renormalized…

High Energy Physics - Theory · Physics 2018-11-21 Shao-Jun Zhang

We study a holographic theory of general spacetimes that does not rely on the existence of asymptotic regions. This theory is to be formulated in a holographic space. When a semiclassical description is applicable, the holographic space is…

High Energy Physics - Theory · Physics 2017-04-12 Yasunori Nomura , Nico Salzetta , Fabio Sanches , Sean J. Weinberg

We present a numerical study, based on Monte Carlo simulations, aimed at defining new empirical parameters measurable from observations and able to trace the different phases of star cluster dynamical evolution. As expected, a central…

Astrophysics of Galaxies · Physics 2022-02-23 B. Bhat , B. Lanzoni , F. R. Ferraro , E. Vesperini

Within the AdS/CFT correspondence, computational complexity for reduced density matrices of holographic conformal field theories has been conjectured to be related to certain geometric observables in the dual gravity theory. We study this…

High Energy Physics - Theory · Physics 2024-12-13 Marius Gerbershagen , Juan Hernandez , Mikhail Khramtsov , Maria Knysh

We derive in detail several universal features in the time evolution of entanglement entropy and other nonlocal observables in quenched holographic systems. The quenches are such that a spatially uniform density of energy is injected at an…

High Energy Physics - Theory · Physics 2014-03-26 Hong Liu , S. Josephine Suh

We explore the two holographic complexity proposals for the case of a 2d boundary CFT with a conformal defect. We focus on a Randall-Sundrum type model of a thin AdS$_2$ brane embedded in AdS$_3$. We find that, using the "complexity=volume"…

High Energy Physics - Theory · Physics 2019-06-05 Shira Chapman , Dongsheng Ge , Giuseppe Policastro

We investigate the holographic complexity growth rate of a conformal field theory in a FLRW universe. We consider two ways to realize a FLRW spacetime from an Anti-de Sitter Schwarzschild geometry. The first one is obtained by introducing a…

High Energy Physics - Theory · Physics 2020-02-12 Yu-Sen An , Rong-Gen Cai , Li Li , Yuxuan Peng

We prove novel speed limits on the growth of entanglement, equal-time correlators, and spacelike Wilson loops in spatially uniform time-evolving states in strongly coupled CFTs with holographic duals. These bounds can also be viewed as…

High Energy Physics - Theory · Physics 2023-02-10 Åsmund Folkestad , Aditya Dhumuntarao

It is well known that quasi-local black hole horizons depend on the choice of a time coordinate in a spacetime. This has implications for notions such as the surface of the black hole and also on quasi-local physical quantities such as…

General Relativity and Quantum Cosmology · Physics 2011-06-30 Alex B. Nielsen , Michael Jasiulek , Badri Krishnan , Erik Schnetter

We describe and study a holographic construction of big-bang / big-crunch cosmological spacetimes where the matter consists of a lattice of black holes. The cosmological spacetime is dual to an entangled state of a collection of holographic…

High Energy Physics - Theory · Physics 2024-11-25 Abhisek Sahu , Mark Van Raamsdonk

We derive a sufficient set of conditions on the Euclidean boundary theory in dS/CFT for it to predict classical, Lorentzian bulk evolution at large spatial volumes. Our derivation makes use of a canonical transformation to express the bulk…

High Energy Physics - Theory · Physics 2017-02-01 Thomas Hertog , Ruben Monten , Yannick Vreys

We construct a novel family of solutions of the holographic superfluid model with the excited states in the probe limit. We observe that the higher excited state or larger superfluid velocity will make the scalar hair more difficult to be…

High Energy Physics - Theory · Physics 2023-09-07 Dong Wang , Qiyuan Pan , Chuyu Lai , Jiliang Jing

Understanding the topological structure of phase space for dynamical systems in higher dimensions is critical for numerous applications, including the computation of chemical reaction rates and transport of objects in the solar system. Many…

Chaotic Dynamics · Physics 2021-06-30 Joshua G. Arenson , Kevin A. Mitchell