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arXiv 2602.15216gr-qchep-th
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双特殊相对论中的黑洞热力学:在共享的操作尺度下近视界g/f温度缩放

Black-hole thermodynamics in doubly special relativity: near-horizon g/f temperature scaling under a shared operational scale

Echahid Cheikh Larbi Tebessi University(埃沙希德谢赫拉比特贝西大学);Fesenkov Astrophysical Institute(费森科夫天体物理研究所)

Abdelmalek Boumali, Nosratollah Jafari

AI总结:

研究双特殊相对论中黑洞热力学中能量的操作意义,比较两种实现方式,发现温度缩放的普遍性,且变形仅通过g/f比值引入。

摘要:

双特殊相对论(DSR)通过引入一个不变的普朗克能量尺度E_P alongside光速,变形特殊相对论动力学,同时保持相对性原理。在弯曲时空特别是黑洞热力学中,关键问题是修改的色散关系(MDRs)中“能量”的操作意义。我们比较了两种常见实现方式:(i)在固定背景几何上的局部正交框架中的MDRs,以及(ii)具有能量依赖的有效度量族的彩虹度量方法。对于静态、球对称的视界和使用一致的有限操作能量尺度E*,两种方法都得到相同的近视界温度缩放 T(E*)=T0*g(E*/E_P)/f(E*/E_P),其中T0=κ0/(2π),f和g是标准彩虹/MDR函数。这确立了隧道/表面重力温度的普遍性,变形仅通过比值g/f引入。我们以Amelino-Camelia MDR和Magueijo-Smolin DSR(其中f=g,意味着T(E*)=T0)进行说明。扩展到具有两个参数的广义DSR(G-DSR)中,主要参数(α2, Δα),我们得到 T_GDRS(E*) = T0*sqrt[(1-2Δα*(E*/E_P))/(1-2α2*(E*/E_P))] ≈ T0[1 - (Δα- α2)E*/E_P]。我们讨论了Δα- α2的作用(对称Δα=α2子家族的修正为零),并指出进一步的模型依赖性来自相空间度量、灰体因子和非线性组合定律。对于宏观黑洞,修正被强烈抑制,仅在普朗克尺度附近变得相关。

英文摘要:

Doubly Special Relativity (DSR) deforms special-relativistic kinematics by introducing an invariant Planck energy scale $E_{\mathrm{Pl}}$ alongside the speed of light, while preserving the relativity principle. A key issue in curved spacetimes, particularly black-hole thermodynamics, is the operational meaning of the ``energy'' in modified dispersion relations (MDRs). We compare two common implementations in a controlled static black-hole spacetime: (i) MDRs in local orthonormal frames on a fixed background geometry, and (ii) the rainbow-metric approach with an energy-dependent family of effective metrics. For static, spherically symmetric horizons and using a consistent finite operational energy scale $E_\star$ for emitted quanta, both yield the same near-horizon temperature rescaling \[ T(E_\star)=T_0\,\frac{g(E_\star/E_{\mathrm{Pl}})}{f(E_\star/E_{\mathrm{Pl}})}, \quad T_0=κ_0/(2π), \] where $f$ and $g$ are the standard rainbow/MDR functions. This establishes a universality of the tunneling/surface-gravity temperature, with deformation entering solely via the ratio $g/f$. We illustrate for Amelino-Camelia MDR and Magueijo-Smolin DSR (where $f=g$, implying $T(E_\star)=T_0$). Extending to a two-parameter generalized DSR (G-DSR) with leading parameters $(α_2, Δα)$, we obtain \[ T_{\mathrm{GDRS}}(E_\star) = T_0 \sqrt{\frac{1-2Δα\,(E_\star/E_{\mathrm{Pl}})}{1-2α_2\,(E_\star/E_{\mathrm{Pl}})}} \simeq T_0 [1 - (Δα- α_2) E_\star/E_{\mathrm{Pl}}]. \] We discuss the role of $Δα- α_2$ (vanishing correction for the symmetric $Δα=α_2$ subfamily) and note that further model dependence arises from phase-space measures, greybody factors, and non-linear composition laws. Corrections are strongly suppressed for macroscopic black holes and become relevant only near the Planck regime.

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