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To capture the inherent geometric features of many community detection problems, we propose to use a new random graph model of communities that we call a Geometric Block Model. The geometric block model builds on the random geometric graphs…

Social and Information Networks · Computer Science 2023-11-21 Sainyam Galhotra , Arya Mazumdar , Soumyabrata Pal , Barna Saha

Rydberg atoms are currently a very fast advancing quantum platform. For many interesting and demanding applications, including quantum computation, fast detection of a Rydberg excitation or a Rydberg qubit for information readout would be…

Quantum Physics · Physics 2025-09-30 Jinjin Du , Thibault Vogt , Ningxuan Zheng , Wenhui Li

Neutral atoms have been observed to survive intense laser pulses in high Rydberg states with surprisingly large probability. Only with this Rydberg-state excitation (RSE) included is the picture of intense-laser-atom interaction complete.…

Diffusion-a measure of dynamics, and entropy-a measure of disorder in the system, are found to be intimately correlated in many systems, and the correlation is often strongly non-linear. We explore the origin of this complex dependence by…

Soft Condensed Matter · Physics 2015-12-09 Kazuhiko Seki , Biman Bagchi

Modeling of intricate relational patterns has become a cornerstone of contemporary statistical research and related data science fields. Networks, represented as graphs, offer a natural framework for this analysis. This paper extends the…

Machine Learning · Statistics 2026-03-13 Bernardo Marenco , Paola Bermolen , Marcelo Fiori , Federico Larroca , Gonzalo Mateos

In a recent work [Phys. Rev. Lett. 98, 023004 (2007)] we have investigated the influence of attractive van der Waals interaction on the pair distribution and Penning ionization dynamics of ultracold Rydberg gases. Here we extend this…

Atomic Physics · Physics 2009-11-13 Thomas Amthor , Markus Reetz-Lamour , Christian Giese , Matthias Weidemüller

We present time-resolved spectroscopic measurements of Rydberg-Rydberg interactions in an ultracold gas, revealing the pair dynamics induced by long-range van der Waals interactions between the atoms. By detuning the excitation laser, a…

Atomic Physics · Physics 2015-06-26 T. Amthor , M. Reetz-Lamour , S. Westermann , J. Denskat , M. Weidemüller

The adsorption or adhesion of large particles (proteins, colloids, cells, >...) at the liquid-solid interface plays an important role in many diverse applications. Despite the apparent complexity of the process, two features are…

Statistical Mechanics · Physics 2007-05-23 J. Talbot , G. Tarjus , P. R. Van Tassel , P. Viot

We discuss techniques to generate long-range interactions in a gas of groundstate alkali atoms, by weakly admixing excited Rydberg states with laser light. This provides a tool to engineer strongly correlated phases with reduced decoherence…

Quantum Gases · Physics 2015-05-14 G. Pupillo , A. Micheli , M. Boninsegni , I. Lesanovsky , P. Zoller

We experimentally demonstrate an original method to measure very accurately the density of a frozen Rydberg gas. It is based on the use of adiabatic transitions induced by the long-range dipole-dipole interaction in pairs of nearest…

Quantum Physics · Physics 2018-08-15 Anne Cournol , Jacques Robert , Pierre Pillet , Nicolas Vanhaecke

The excitation spread caused by Rydberg facilitation in a gas of laser driven atoms is an interesting model system for studying epidemic dynamics. We derive a mean-field approach to describe this facilitation process in the limits of high…

Quantum Gases · Physics 2023-08-29 Daniel Brady , Michael Fleischhauer

The Rydberg excitation blockade has been at the heart of an impressive array of recent achievements; however, state-mixing interactions can compromise its efficiency. When ultracold atoms are excited to Rydberg states near F\"orster…

Atomic Physics · Physics 2022-09-05 Milo Eder , Andrew Lesak , Abigail Plone , Tomohisa Yoda , Michael Highman , Aaron Reinhard

Exploring controllable interactions lies at the heart of quantum science. Neutral Rydberg atoms provide a versatile route toward flexible interactions between single quanta. Previous efforts mainly focused on the excitation…

Quantum Physics · Physics 2021-02-02 Xiao-Feng Shi

Strongly Rydberg-blockaded two-level atoms form a Rydberg superatom, which is excited only to a collective symmetrical Dicke state. However, emerging often in the alkali-earth atoms, the spontaneous decay from the Rydberg state to an…

Quantum Physics · Physics 2021-12-21 Chang Qiao , Wenxian Zhang

We investigate a long-range interaction between $64D_{5/2}$ Rydberg-atom pairs and antiblockade effect employing a two-color excitation scheme. The first color (pulse A) is set to resonantly excite the Rydberg transition and prepare a few…

Atomic Physics · Physics 2020-02-25 Suying Bai , Xuedong Tian , Xiaoxuan Han , Yuechun Jiao , Jinhui Wu , Jianming Zhao , Suotang Jia

We provide new connectivity results for {\em vertex-random graphs} or {\em random annulus graphs} which are significant generalizations of random geometric graphs. Random geometric graphs (RGG) are one of the most basic models of random…

Discrete Mathematics · Computer Science 2020-05-18 Sainyam Galhotra , Arya Mazumdar , Soumyabrata Pal , Barna Saha

Randomness or mutual independence is a fundamental assumption forming the basis of statistical inference across disciplines such as economics, finance, and management. Consequently, validating this assumption is essential for the reliable…

Methodology · Statistics 2025-06-27 Shriya Gehlot , Arnab Kumar Laha

Rydberg atom arrays with Van der Waals interactions provide a controllable path to simulate the locally connected transverse-field Ising model (TFIM), a prototypical model in statistical mechanics. Remotely operating the publicly accessible…

Quantum Physics · Physics 2026-01-05 Ceren B. Dag , Hanzhen Ma , P. Myles Eugenio , Fang Fang , Susanne F. Yelin

We consider the role of high-lying Rydberg states of simple atomic systems such as $^1$H in setting constraints on physics beyond the Standard Model. We obtain highly accurate bound states energies for a hydrogen atom in the presence of an…

High Energy Physics - Phenomenology · Physics 2020-03-06 Matthew P. A. Jones , Robert M. Potvliege , Michael Spannowsky

We present experimental results on the controlled de-excitation of Rydberg states in a cold gas of Rb atoms. The effect of the van der Waals interactions between the Rydberg atoms is clearly seen in the de-excitation spectrum and dynamics.…

Atomic Physics · Physics 2017-10-18 C. Simonelli , M. Archimi , L. Asteria , D. Capecchi , G. Masella , E. Arimondo , D. Ciampini , O. Morsch