Numerical solutions for the f(R)-Klein-Gordon system

نویسندگان

چکیده

Abstract We construct a numerical relativity code based on the Baumgarte-Shapiro-Shibata-Nakamura (BSSN) formulation for gravitational quadratic f(R) Starobinsky model. By removing assumption that determinant of conformal 3-metric is unity, we first generalize BSSN general gravity theories in metric formalism to accommodate arbitrary coordinates time. then describe implementation this paradigmatic apply three scenarios: Schwarzschild black hole solution, flat space with non-trivial gauge dynamics, and massless Klein-Gordon scalar field. In each case, long-term stability second-order convergence demonstrated. The case field used exercise additional terms variables resulting from contributions. For model, show time damped oscillations arise subcritical regime as system approaches stable configuration.

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ژورنال

عنوان ژورنال: Classical and Quantum Gravity

سال: 2023

ISSN: ['1361-6382', '0264-9381']

DOI: https://doi.org/10.1088/1361-6382/ace607