09 بهمن 1401
طاهره عزيزي

طاهره عزیزی

مرتبه علمی: استادیار
نشانی:
تحصیلات: دکترای تخصصی / فیزیک
تلفن: 35302480
دانشکده: دانشکده علوم پایه

مشخصات پژوهش

عنوان Gravitational wave polarization in exponential forms of f(R) gravity with coupling to matter
نوع پژوهش مقاله چاپ شده
کلیدواژه‌ها
Gravitational wave; polarization mode; modified gravity; nonminimal coupling; Newman–Penrose formalism.
مجله INTERNATIONAL JOURNAL OF MODERN PHYSICS D
شناسه DOI 10.1142/S0218271820500042
پژوهشگران مجتبی حق شناس (نفر اول) ، طاهره عزیزی (نفر دوم)

چکیده

We investigate polarizations of gravitational waves in generalized theories of gravity whose action contains a nonminimal coupling (NMC) between an exponential function of f(R) gravity and the matter field. Specifically, we consider two classes of such models. In the first case, we assume an explicit NMC between the matter Lagrangian density and curvature while in the second case, we consider the exponential f(R) gravity coupled to the trace of the stress-energy tensor of a scalar field. Using the Newman–Penrose quantities, we show that these models can be considered as suitable choices in order to produce new polarization modes.