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7 papers found.
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Topological entanglement entropy in Euclidean AdS3 via surgery

We calculate the topological entanglement entropy (TEE) in Euclidean asymptotic AdS3 spacetime using surgery. The treatment is intrinsically three-dimensional. In the BTZ black hole background, several different bipartitions are applied. For the bipartition along the horizon between two single-sided black holes, TEE is exactly the Bekenstein-Hawking entropy, which supports the ER...

Compliance control based on PSO algorithm to improve the feeling during physical human–robot interaction

Robots play more important roles in daily life and bring us a lot of convenience. But when people work with robots, there remain some significant differences in human–human interactions and human–robot interaction. It is our goal to make robots look even more human-like. We design a controller which can sense the force acting on any point of a robot and ensure the robot can move...

Fast and scalable structure-from-motion based localization for high-precision mobile augmented reality systems

A key problem in mobile computing is providing people access to cyber-information associated with their surrounding physical objects. Mobile augmented reality is one of the emerging techniques that addresses this problem by allowing users to see the cyber-information associated with real-world physical objects by overlaying that cyber-information on the physical objects’ imagery...

Decomposing the meridional heat transport in the climate system

Haijun Yang Qing Li Kun Wang Yu Sun Daoxun Sun 0 ) Q. Li K. Wang Y. Sun D. Sun Laboratory for Climate and Ocean-Atmosphere Studies (LaCOAS), Department of Atmospheric and Oceanic Sciences

Janus configurations with SL(2, ℤ)-duality twists, strings on mapping tori and a tridiagonal determinant formula

We develop an equivalence between two Hilbert spaces: (i) the space of states of U(1) n Chern-Simons theory with a certain class of tridiagonal matrices of coupling constants (with corners) on T 2; and (ii) the space of ground states of strings on an associated mapping torus with T 2 fiber. The equivalence is deduced by studying the space of ground states of SL(2, ℤ)-twisted...

Q-balls of quasi-particles in a (2, 0)-theory model of the fractional quantum Hall effect

Abstract A toy model of the fractional quantum Hall effect appears as part of the low-energy description of the Coulomb branch of the A 1 (2, 0)-theory formulated on \( \left({S}^1\times {\mathrm{\mathbb{R}}}^2\right)/{\mathrm{\mathbb{Z}}}_k \), where the generator of \( {\mathrm{\mathbb{Z}}}_k \) acts as a combination of translation on S 1 and rotation by 2π/k on \( {\mathrm...

Pore size-controlled synthesis of molecular sieves and theirs difference in catalytic properties for Fischer–Tropsch synthesis

Three molecular sieves with different pore size distributions, i.e., mesopore (Al-MCM-41), micropore (ZSM-5) and hierarchical pore (HPMS), were synthesized under hydrothermal condition and characterized by N2 adsorption–desorption. Three cobalt-loaded catalysts, i.e., Co/Al-MCM-41, Co/ZSM-5 and Co/HPMS, were prepared by impregnating cobalt nitrate onto three molecular sieves...