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Quasi-static transverse electric field driven electron acceleration in relativistic laser matter interaction
Authors:
Ameya Parab,
Bhooshan Paradkar,
Aparajit C.,
Anandam,
Sk Rakeeb,
Sagar Dam,
Prashant Kumar Singh
Abstract:
Achieving significant energy gain in laser-driven relativistic electron beams remains challenging due to dephasing between the accelerating laser field and the electrons. We show that transverse electric fields, when aligned with the plane of laser polarization, can mitigate dephasing and enable substantial energy gain without compromising beam directionality. As a practical realization, we propos…
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Achieving significant energy gain in laser-driven relativistic electron beams remains challenging due to dephasing between the accelerating laser field and the electrons. We show that transverse electric fields, when aligned with the plane of laser polarization, can mitigate dephasing and enable substantial energy gain without compromising beam directionality. As a practical realization, we propose a two-laser scheme in which one laser generates the transverse field while the other drives electron acceleration. By tailoring the interaction geometry, this configuration sustains phase locking, enhances energy transfer, and opens a pathway toward compact, high-efficiency electron accelerators.
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Submitted 28 July, 2026;
originally announced July 2026.
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Economic Entropy and Sectoral Dynamics: A Thermodynamic Approach to Market Analysis
Authors:
W. A. Rojas C.,
A. Zamora V.,
L. F. Quijano W.,
Y. Beltran P
Abstract:
This paper presents an application of geometrothermodynamics (GTD) to the economic analysis of Bogotá's sports sector through the Satellite Account of Sport (CSDB). By establishing an analogy between thermodynamic systems and economic structures, we develop a mathematical framework where monetary flows behave analogously to energy, while economic entropy, temperature, and heat capacity acquire wel…
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This paper presents an application of geometrothermodynamics (GTD) to the economic analysis of Bogotá's sports sector through the Satellite Account of Sport (CSDB). By establishing an analogy between thermodynamic systems and economic structures, we develop a mathematical framework where monetary flows behave analogously to energy, while economic entropy, temperature, and heat capacity acquire well-defined economic interpretations. The study focuses on two contrasting sectors: gambling and betting $\mathbb{S}_{15}$, and recreational and sports activities $\mathbb{S}_{16}$, analyzing data from 2018-2023. Our results demonstrate that $\mathbb{S}_{15}$ exhibits lower economic entropy than $\mathbb{S}_{16}$ , indicating a higher degree of organization and regulatory structure in the gambling sector compared to the more heterogeneous recreational sports sector. The heat capacity function reveals critical points that may signal phase transitions in economic dynamics, while Ricci and Kretschmann curvature scalars identify potential crisis points in the sectoral organization. Furthermore, the cross-income elasticity analysis shows distinct resource flow patterns between sectors, suggesting that gambling activities may serve as an economic driver for recreational sports. This thermodynamic approach provides a quantitative tool for analyzing resource redistribution policies and anticipating critical transitions in sectoral economics. The findings suggest that econophysics and statistical thermodynamics constitute powerful frameworks for understanding the sectoral dynamics of Bogotá's sports economy, with significant potential for developing prospective analysis tools in public policy design.
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Submitted 3 October, 2025;
originally announced October 2025.
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Impulsive excitation of a solid by extreme contrast, high intensity femtosecond laser pulses
Authors:
Sagar Dam,
Jian Fuh Ong,
Sk Rakeeb,
Ameya Parab,
Aparajit C,
Anandam,
Amit D Lad,
Yash M Ved,
M Krishnamurthy,
Kazuo A Tanaka,
G Ravindra Kumar
Abstract:
We present the ultra-fast dynamics of the interaction between a high-intensity extreme contrast (expected to be around 1e-18 at hundreds of picoseconds timescale) femtosecond laser and a solid. Simultaneous measurements of probe Doppler spectrometry and reflectivity in pump-probe experiments reveal the presence of extreme pressure in the solid density region, which triggers a long-lived (about 15…
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We present the ultra-fast dynamics of the interaction between a high-intensity extreme contrast (expected to be around 1e-18 at hundreds of picoseconds timescale) femtosecond laser and a solid. Simultaneous measurements of probe Doppler spectrometry and reflectivity in pump-probe experiments reveal the presence of extreme pressure in the solid density region, which triggers a long-lived (about 15 ps) strong inward shock. Hydrodynamic simulations accurately replicate these observations, providing a detailed explanation of the underlying physics
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Submitted 19 August, 2025;
originally announced August 2025.
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Thermostatistical Evaluation of Economic Activity
Authors:
W. A. Rojas C.,
A. Zamora V
Abstract:
We present an analysis of Bogot'{a}'s sports sector through thermostatistical models applied to economic systems. The study investigates the cross-price elasticity of income ($λ$) to determine whether sports services in Bogot'{a} are normal or inferior goods. Analyzing data from the Sports Satellite Account of Bogot'{a} (CSDB) from 2018 to 2022, we find that demand for sports services is highly el…
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We present an analysis of Bogot'{a}'s sports sector through thermostatistical models applied to economic systems. The study investigates the cross-price elasticity of income ($λ$) to determine whether sports services in Bogot'{a} are normal or inferior goods. Analyzing data from the Sports Satellite Account of Bogot'{a} (CSDB) from 2018 to 2022, we find that demand for sports services is highly elastic, particularly during economic upturns, indicating they are seen as normal or luxury goods. We also calculate the partition function, entropy, and heat capacity, showing consistency with the Boltzmann Principle, which indicates a strong correlation between microstates and the macroeconomic state, supporting the statistical thermodynamic framework. Furthermore, the study employs geometrothermodynamics to assess system stability using Kretschmann and Ricci scalars to identify economic singularities, especially during the pandemic, highlighting its disruptive impact. This approach provides a nuanced understanding of system stability and the effects of external shocks like COVID-19 on the economic structure. Our analysis demonstrates that Bogot'{a}'s sports sector responds elastically to GDP changes, with stability influenced by various macroeconomic factors. However, a decline in heat capacity as economic temperature rises suggests potential growth limitations, necessitating further research to fully grasp the sector's long-term outlook.
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Submitted 23 October, 2024;
originally announced October 2024.
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Quantum Ecosystem Research and Analysis in Colombia
Authors:
Cristian E. Bello,
Benjamin Harper,
Camilo A. Castro,
Alcides Montoya C
Abstract:
The rapid growth of quantum computing in the last few years has led many countries to make relevant public investments in that field. However, Colombia lacks any investment or legislation in this area. Most previous studies have focused on other countries, contributing to the region's significant lag. In this paper, we propose efforts to include quantum computing as a fundamental pillar of Colombi…
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The rapid growth of quantum computing in the last few years has led many countries to make relevant public investments in that field. However, Colombia lacks any investment or legislation in this area. Most previous studies have focused on other countries, contributing to the region's significant lag. In this paper, we propose efforts to include quantum computing as a fundamental pillar of Colombia's development plan. In this research we involved three stakeholders: academia (Universidad Nacional de Colombia), industry (Alianza Team), and government (Vice Ministry of Digital Transformation). We anticipate that our work will provide a connection between all stakeholders involved in public investments in quantum technology in the country and will facilitate its legislation.
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Submitted 21 August, 2024;
originally announced September 2024.
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Lightning Impulse Current Tests on some Electroconductive Fabrics
Authors:
Jorge A. Cristancho C.,
Carlos A. Rivera G.,
Jorge E. Rodriguez M.,
John J. Pantoja A.,
Liz K. Herrera Q.,
Francisco Roman
Abstract:
On the search of lightweight lightning protection materials that can be used as part of lightning protection systems, we investigate some types of electroconductive fabrics by applying several lightning impulse currents in laboratory. Samples of four commercially available electroconductive textiles were analyzed, two rip-stop, a plain-weave, a nonwoven, and additionally a carbon-impregnated polym…
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On the search of lightweight lightning protection materials that can be used as part of lightning protection systems, we investigate some types of electroconductive fabrics by applying several lightning impulse currents in laboratory. Samples of four commercially available electroconductive textiles were analyzed, two rip-stop, a plain-weave, a nonwoven, and additionally a carbon-impregnated polymeric film. Under laboratory conditions, each sample was subjected to several lengthwise subsequent lightning-like currents of 8/20 us standard waveform, recording both voltage and current signals. Optical and scanning electron microscope observations were performed after tests, revealing some patterns or morphological changes on the fabric surface. Despite these changes, the investigated conductive textiles withstand the several lightning impulse currents applied. Results suggest that some conductive fabrics could be used in personal mobile shelters, to protect human beings against the earth potential rise caused by a close lightning discharge.
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Submitted 2 May, 2023; v1 submitted 12 November, 2019;
originally announced November 2019.
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Approach to spatial estimation of meteorological droughts in the Coello River basin, Colombia
Authors:
Cruz Roa AF,
Miguel Barrios
Abstract:
The space-temporal evaluation to characterize meteorological droughts was based on data accumulated monthly precipitation between 1996-2005 from 20 meteorological stations distributed in the Coello River basin. Data precipitation was performed preprocessing with data consistency tests to correct and delete data over- or under estimated. To estimate missing precipitation data are compared three geo…
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The space-temporal evaluation to characterize meteorological droughts was based on data accumulated monthly precipitation between 1996-2005 from 20 meteorological stations distributed in the Coello River basin. Data precipitation was performed preprocessing with data consistency tests to correct and delete data over- or under estimated. To estimate missing precipitation data are compared three geostatistical interpolation methods derived from Kriging, associated with secondary variables such as the Ordinary Kriging, CoKrigin Ordinary associated with secondary variables of a Digital Elevation Model and data satellite TRMM. To select the statistical method the setting of each interpolation was compared with respect to three reference stations through three quality tests, which were Root Mean Square Error (RMSE), Akaike Information Criterion (AIC) and Bayesian Information Criterion (BIC). In this investigation two of three tests favor the Ordinary CoKriging using as a secondary variable Altitude (COK+DEM). With the interpolated series of precipitation were evaluated and characterized by drought Standardized Precipitation Index (SPI) at monthly and quarterly scale, calculating the parameters of severity, duration, intensity and frequency of droughts. By mapping are delimited the regions where occur the more negative values of SPI. In analyzing spacetemporal the months of January, February, July and August are the driest of the year. In 1997 the meteorological drought greatest damage occurs in the Coello River basin generally concentrated in the middle and lower part of the basin, with a maximum intensity of SPI -2,57.
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Submitted 1 March, 2017;
originally announced March 2017.