https://doi.org/10.1140/epjc/s10052-026-15858-y
Regular Article - Theoretical Physics
Joule–Thomson effect and efficiency of deformed AdS–Schwarzschild black hole in presence of quintessence
1
Department of Physics, Madhabdev University, Narayanpur, 784164, Lakhimpur, Assam, India
2
Research Center of Astrophysics and Cosmology, Khazar University, 41 Mehseti Street, AZ1096, Baku, Azerbaijan
3
Department of Physics, Moran College, Moranhat, 785670, Charaideo, Assam, India
4
Pacif Institute of Cosmology and Selfology (PICS) Sagara, 768224, Sambalpur, Odisha, India
a
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Received:
2
February
2026
Accepted:
17
May
2026
Published online:
8
June
2026
Abstract
We study the Joule–Thomson expansion and extended thermodynamics of a modified black hole characterised by the parameters 
, 
, and 
. Analysis of the Hawking temperature, Joule–Thomson coefficient, inversion curves, and isenthalpic trajectories shows that these parameters significantly modify the heating–cooling behaviour and thermal stability of the system. The deformation parameter and control parameter shift the temperature minimum, enlarge the cooling region, and raise the inversion temperature, while produces a weaker but consistent influence. The heat-engine analysis reveals that enhances efficiency, whereas higher and reduce it. Overall, the results demonstrate that geometric deformation and quintessence jointly govern the unified thermodynamic structure of the black hole.
© The Author(s) 2026
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