4 papers
Quadratic Axion Couplings in String Theory
Naman Agarwal, Andrew R. Frey, Ratul Mahanta +1
The paper investigates how string theory can generate quadratic couplings between axion-like particles and electromagnetic fields, exploring classical, perturbative, and non‑pertur…
Time-dependent flux backgrounds in type IIB supergravity
Ahmed Rakin Kamal, Ratul Mahanta
We analytically construct families of type IIB supergravity backgrounds in ten dimensions in which the four-dimensional metric is time dependent, while the six-dimensional internal…
Dimensional Reduction and Kähler Metric for Metric Moduli in Imaginary Self-Dual Flux
Andrew R. Frey, Ratul Mahanta
Understanding which effective field theories are consistent with an ultraviolet completion in quantum gravity is an important theoretical question. Therefore, it is important to kn…
Gravitational Waves from High Temperature Strings
Andrew R. Frey, Ratul Mahanta, Anshuman Maharana +2
We study finite temperature effects in string cosmology and their potential gravitational wave signature. Expanding on our recent work arXiv:2310.11494 , we consider a general conf…