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Loop Quantum Gravity is a background independent, nonperturbative approach to the quantization of General Relativity. Its application to models of interest in cosmology and astrophysics, known as Loop Quantum Cosmology, has led to new and…

广义相对论与量子宇宙学 · 物理学 2015-05-27 Guillermo A. Mena Marugan

Since the gauge group underlying 2+1-dimensional general relativity is non-compact, certain difficulties arise in the passage from the connection to the loop representations. It is shown that these problems can be handled by appropriately…

广义相对论与量子宇宙学 · 物理学 2010-04-06 A. Ashtekar , R. Loll

Research during the last decade demonstrates that effects originating on the Planck scale are currently being tested in multiple observational contexts. In this review we discuss quantum gravity phenomenological models and their possible…

广义相对论与量子宇宙学 · 物理学 2012-12-14 Florian Girelli , Franz Hinterleitner , Seth A. Major

A new formalism for lattice gauge theory is developed that preserves Poincar\'e symmetry in a discrete universe. We define the $\mathbb{1}$-loop, a generalization of the Wilson loop that reformulates classical differential equations of…

高能物理 - 理论 · 物理学 2020-07-15 Alexander S. Glasser , Hong Qin

Finding eigenvalue distributions for a number of sparse random matrix ensembles can be reduced to solving nonlinear integral equations of the Hammerstein type. While a systematic mathematical theory of such equations exists, it has not been…

无序系统与神经网络 · 物理学 2025-01-24 Pawat Akara-pipattana , Oleg Evnin

Despite the popularity of low-rank matrix completion, the majority of its theory has been developed under the assumption of random observation patterns, whereas very little is known about the practically relevant case of non-random…

机器学习 · 计算机科学 2023-02-24 Manolis C. Tsakiris

In the first part of the talk, I review the applications of loop equations to the matrix models and to 2-dimensional quantum gravity which is defined as their continuum limit. The results concerning multi-loop correlators for low genera and…

高能物理 - 理论 · 物理学 2007-05-23 Yu. Makeenko

Loop measures and their associated loop soups are generally viewed as arising from finite state Markov chains. We generalize several results to loop measures arising from potentially complex edge weights. We discuss two applications:…

概率论 · 数学 2014-06-26 Gregory F. Lawler , Jacob Perlman

We investigate the implications of free probability for random matrices. From rules for calculating all possible joint moments of two free random matrices, we develop a notion of partial freeness which is quantified by the breakdown of…

概率论 · 数学 2013-05-23 Jiahao Chen , Troy Van Voorhis , Alan Edelman

In these lectures we discuss some elementary concepts in connection with the theory of symmetric spaces applied to ensembles of random matrices. We review how the relationship between random matrix theory and symmetric spaces can be used in…

数学物理 · 物理学 2007-05-23 Ulrika Magnea

This is the first in a series of papers presenting a new understanding of scattering amplitudes based on fundamentally combinatorial ideas in the kinematic space of the scattering data. We study the simplest theory of colored scalar…

高能物理 - 理论 · 物理学 2024-10-01 N. Arkani-Hamed , H. Frost , G. Salvatori , P-G. Plamondon , H. Thomas

A random matrix is likely to be well conditioned, and motivated by this well known property we employ random matrix multipliers to advance some fundamental matrix computations. This includes numerical stabilization of Gaussian elimination…

数值分析 · 数学 2012-12-27 Victor Y. Pan , Guoliang Qian

We study the random loop model with crosses and bars on sparse random graphs. Our main objective is to prove the existence of macroscopic loops, in the sense that a loop visits a positive proportion of the vertices. We develop a…

概率论 · 数学 2026-04-23 Andreas Klippel

The recently developed theory of higher--rank numerical ranges originated in problems of error correction in quantum information theory but its mathematical implications now include a quite satisfactory understanding of \emph{scalar}…

泛函分析 · 数学 2012-03-27 John Holbrook , Nishan Mudalige , Rajesh Pereira

This article is an introductory review of random matrix theory (RMT) and its applications, with special focus on quantum chaos. Random matrices were first used by Wigner to understand the spectra of complex nuclei from a statistical…

统计力学 · 物理学 2019-05-28 Akhilesh Pandey , Avanish Kumar , Sanjay Puri

We seek random versions of some classical theorems on complex approximation by polynomials and rational functions, as well as investigate properties of random compact sets in connection to complex approximation.

复变函数 · 数学 2017-09-26 Simon St-Amant , Jérémie Turcotte

Development of quantum gravity theories rarely takes inputs from experimental physics. In this letter, we take a small step towards correcting this by establishing a paradigm for incorporating putative quantum corrections, arising from…

高能物理 - 理论 · 物理学 2018-01-30 Suddhasattwa Brahma , Michele Ronco

This is a survey article written for a workshop on L-functions and random matrix theory at the Newton Institute in July, 2004. The goal is to give some insight into how well-distributed sets of matrices in classical groups arise from…

数论 · 数学 2010-02-18 Douglas Ulmer

Quantum walks are powerful tools not only to construct the quantum speedup algorithms but also to describe specific models in physical processes. Furthermore, the discrete time quantum walk has been experimentally realized in various…

量子物理 · 物理学 2010-06-29 Yutaka Shikano , Kota Chisaki , Etsuo Segawa , Norio Konno

We derive the loop equations for the one Hermitian matrix model in any dimension. These are a consequence of the Schwinger-Dyson equations of the model. Moreover we show that in leading order of large $N$ the loop equations form a closed…

高能物理 - 理论 · 物理学 2009-10-22 J. Alfaro