64 citations · 64 across the 2 of their papers we have counts for
14 papers
Quantum non-Markovian Hatano-Nelson model
Sumit Kumar Jana, Ryo Hanai, Tan Van Vu +2
While considering non-Hermitian Hamiltonians arising in the presence of dissipation, in most cases, the dissipation is taken to be frequency independent. However, this idealization…
Accelerated calculation of impurity Green's functions exploiting the extreme Mpemba effect
David J. Strachan, Archak Purkayastha, Stephen R. Clark
Simulating the dynamics of quantum impurity models remains a fundamental challenge due to the complex memory effects that arise from system-environment interactions. Of particular…
Extracting Dynamical Maps of Non-Markovian Open Quantum Systems
David J. Strachan, Archak Purkayastha, Stephen R. Clark
The most general description of quantum evolution up to a time is a completely positive tracing preserving map known as a dynamical map . Here we consider …
On the difference between thermalization in open and isolated quantum systems: a case study
Archak Purkayastha, Giacomo Guarnieri, Janet Anders +1
Thermalization of isolated and open quantum systems has been studied extensively. However, being the subject of investigation by different scientific communities and being analysed…
Arbitrary order transfer matrix exceptional points and van Hove singularities
Madhumita Saha, Bijay Kumar Agarwalla, Manas Kulkarni +1
In lattice models with quadratic finite-range Hermitian Hamiltonians, the inherently non-Hermitian transfer matrix (TM) governs the band dispersion. The van Hove singularities (VHS…
Quantum dynamics in the interacting Fibonacci chain
Cecilia Chiaracane, Francesca Pietracaprina, Archak Purkayastha +1
Quantum dynamics on quasiperiodic geometries has recently gathered significant attention in ultra-cold atom experiments where non trivial localised phases have been observed. One s…