2 papers
quant-ph2026
P-divisibility conditions on subsystems in quantum dynamics
Anumita Mukhopadhyay, Praggnyamita Ghosh, Shibdas Roy
We investigate the constraints imposed by global unitary dynamics on the P-divisibility of local subsystems in a bipartite system-environment setting. Using the trace distance as a…
quant-ph2026
Complete Positivity of Subsystems in Quantum Dynamics
Anumita Mukhopadhyay, Praggnyamita Ghosh, Shibdas Roy
Although many quantum channels satisfy Completely Positive Trace Preserving (CPTP) condition, there are valid quantum channels that can be non-completely positive (NCP). As memory…