5 papers · 1 filter
Asymptotic TCL4 Generator for the Spin-Boson Model: Analytical Derivation and Benchmarking
Prem Kumar, K. P. Athulya, Sibasish Ghosh
The spin-boson model is a widely used model for understanding the properties of a two-level open quantum system. Accurately describing its dynamics often requires going beyond the…
Post-Markovian master equation à la microscopic collisional model
Tanmay Saha, Sahil, K. P. Athulya +1
We derive a completely positive post-Markovian master equation (PMME) from a microscopic Markovian collisional model framework, incorporating bath memory effects via a probabilisti…
Equivalence between the second order steady state for the spin-Boson model and its quantum mean force Gibbs state
Prem Kumar, K. P. Athulya, Sibasish Ghosh
When the coupling of a quantum system to its environment is non-negligible, its steady state is known to deviate from the textbook Gibbs state. The Bloch-Redfield quantum master eq…
Photonic dephasing dynamics and role of initial correlations
Sina Hamedani Raja, K P Athulya, Anil Shaji +1
Dynamics of open quantum systems depends on different types of initial correlations. On the one hand, when system and environment are both inherently multipartite, initial correlat…
Quantum steering in a qubit-field system
K. P. Athulya, Anil Shaji
Quantum steering in a system consisting of a qubit coupled to a single-mode field is explored when classical-like measurements implemented by heterodyne detection schemes that coll…