近日，印度VIT-AP大学Raja Solanki团队报道了重力框架下耗散Chaplygin气体宇宙学的观测约束。该研究于2026年3月29日发表在《中国物理C》杂志上。

研究组通过对称远平行引力中的广义Chaplygin气体模型，揭示了暗能量与暗物质的统一方法。他们采用了由广义Chaplygin气体提供的状态方程，该方程自然出现在弦理论、快子场论以及Randall-Sundrum型膜世界解中。研究组表明，这种广义Chaplygin气体不仅能成为有吸引力的暗能量候选者，还能通过玻色-爱因斯坦凝聚成为可行的暗物质候选者。

同时，研究组考虑了暗物质与暗能量之间的相互作用，以提供更贴近现实的图景。结合哈勃和Pantheon数据集进行了MCMC分析，还进行了Om诊断和r-s图分析，以评述模型在晚期的行为。通过Om诊断，研究组发现参数值处于幻影区域，并给出了预期出现这一结果的物理原因。最后，研究组概述了未来研究的一些方向。

附：英文原文

Title: Observational Constraints on Dissipative Chaplygin Gas Cosmology in the Framework of Coincident <i>f</i>(<i>Q</i>) Gravity

Author: Sayantan Ghosh, Raja Solanki, P.K. Sahoo

Issue&Volume: 2026-03-29

Abstract: In this current work, we shed light on the unified approach to both dark energy and dark matter via the generalized Chaplygin gas model in symmetric teleparallel gravity (STGR). We have employed the equation of state provided by the generalized Chaplygin gas, which naturally arises in string theory, tachyonic field theory, and Randall-Sundrum type brane world solutions. We show that such a generalized Chaplygin gas can not only provide a lucrative candidate for dark energy but also a viable candidate for dark matter via Bose-Einstein Condensation (BEC). We have also taken into account the interaction between dark matter and dark energy to provide a more realistic perspective. We performed MCMC analysis with combined Hubble and Pantheon data sets. We have also performed the Om diagnostics and the rs plot to comment on the late behavior of our model. We have also found that through Om diagnostics, the values are in Phantom regions, and we have given physical reasons why this is expected. Finally, we outline some future directions for our work to be carried out.

DOI: 10.1088/1674-1137/ae50e5

Source: http://hepnp.ihep.ac.cn/article/doi/10.1088/1674-1137/ae50e5