Reflected entropy and timelike entanglement in TT̄ deformed CFT₂s

We develop a covariant formalism to investigate the mixed state entanglement structure of time-dependent boosted subsystems in TT̄ deformed CFT₂s through the reflected entropy. To this end we utilize the conformal perturbation theory to obtain the R\'enyi reflected entropy through the partition function on replica manifold. The correction to the reflected entropy to the first order in the deformation parameter μ in then obtained in the replica limit for finite temperature and finite sized systems. We verify our field theoretic computations by obtaining the dual EWCS in the corresponding bulk cut-off AdS₃ geometries and find perfect agreement between the two.