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5 papers · 1 filter
Polarization tensor in de Sitter gauge gravity
R. Raziani, M. V. Takook
The gauge theory of the de Sitter group, SO, in the ambient space formalism has been considered in this article. This method is essential to constructing the de Sitter super…
Conceptual and technical challenges of quantum gravity
M. V. Takook
The appearance of infinity together with collapsing quantum state due to the observation or interaction, which are two challenging features of quantum field theory, become very ser…
Nonlocal quantum heat engines made of hybrid superconducting devices
S. Mojtaba Tabatabaei, David Sanchez, Alfredo Levy Yeyati +1
We discuss a quantum thermal machine that generates power from a thermally driven double quantum dot coupled to normal and superconducting reservoirs. Energy exchange between the d…
Horizon-scale tests of gravity theories and fundamental physics from the Event Horizon Telescope image of Sagittarius A
Sunny Vagnozzi, Rittick Roy, Yu-Dai Tsai +12
Horizon-scale images of black holes (BHs) and their shadows have opened an unprecedented window onto tests of gravity and fundamental physics in the strong-field regime. We conside…
The First Photometric Study of AH Mic Contact Binary System
Atila Poro, Mark G. Blackford, Selda Ranjbar Salehian +7
The first multi-color light curve analysis of the AH Mic binary system is presented. This system has very few past observations from the southern hemisphere. We extracted the minim…