4 papers · 1 filter
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…
Efficient algorithm for fidelity estimation of two quantum states
Anumita Mukhopadhyay, Shibdas Roy, Arun Kumar Pati
The fidelity estimation between two quantum states is crucial for quantum computation and information science. However, an efficacious method for this, especially for mixed states…
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…
Unitality Conditions on Subsystems in Quantum Dynamics
Anumita Mukhopadhyay, Shibdas Roy, Arun Kumar Pati
It is known that non-unital noise such as the amplitude damping can sometimes increase quantum correlations, while unital noise such as the dephasing usually decreases quantum corr…