6 papers
Fermionic S-matrix and cosmological correlators: T-violation at O(H)
Aman Goyal, Aneek Jana, Swapnanil Mandal +1
We study the Bunch-Davies (BD) and Unruh-de Witt (UdW) de Sitter S-matrices in the presence of spin- fermions. Building on recent work, this enables us to correlate the de Sit…
Tunable topology, Hall response, and spin-textures in bicircularly polarized light illuminated altermagnets
Maitri Ganguli, Aneek Jana, Awadhesh Narayan
Altermagnets, featuring non-relativistic spin splitting, have drawn enormous attention due to their intriguing properties. Here, we investigate the effects of shining bicircularly…
Generalization of Modular Spread Complexity for Non-Hermitian Density Matrices
Aneek Jana, Maitri Ganguli
In this work we generalize the concept of modular spread complexity to the cases where the reduced density matrix is non-Hermitian. This notion of complexity and associated Lanczos…
Floquet engineering of topological semimetals with bicircularly polarized light
Maitri Ganguli, Aneek Jana, Awadhesh Narayan
We study the effect of illumination of bicircularly polarized light (BCL) on topological semimetals, namely multifold fermion and line-node semimetals. We demonstrate, by means of…
State Dependent Spread Complexity Dynamics in Many-Body Localization Transition
Maitri Ganguli, Aneek Jana
We characterize the Many-Body Localization (MBL) phase transition using the dynamics of spread complexity and inverse participation ratio in the Krylov space starting from differen…
Quantum chaos and complexity from string scattering amplitudes
Aranya Bhattacharya, Aneek Jana
We introduce Krylov spread complexity in the context of black hole scattering by studying highly excited string states (HESS). Krylov complexity characterizes chaos by quantifying…