5 papers · 1 filter
Diagonal Unitary Covariant Superchannels
Dariusz ChruÅciÅski, Vivek Pandey, Sohail
We present a complete characterization of diagonal unitary covariant (DU-covariant) superchannels, i.e. higher-order transformations transforming quantum channels into themselves.…
Fundamental limitations on the recoverability of quantum processes
Sohail, Vivek Pandey, Uttam Singh +1
Quantum information processing and computing tasks can be understood as quantum networks, comprising quantum states and channels and possible physical transformations on them. It i…
Unified Framework for Direct and Complete Characterization of an Unknown Kraus Operator and Density Matrix Using a Single Input State
Sahil, Swarup Kumar Giri, Sohail
Characterization of quantum measurements and dynamical processes is typically performed using pure state preparations. However, in realistic experimental settings, the preparation…
Unified Framework for Direct Characterization of Kraus Operators, Observables, Density Matrices, and Weak Values Without Weak Interaction
Sahil, Sohail
Generalized quantum measurements, described by positive operator-valued measures (POVMs), are essential for modeling realistic processes in open quantum systems. While quantum proc…
Fundamental speed limits on entanglement dynamics of bipartite quantum systems
Vivek Pandey, Swapnil Bhowmick, Brij Mohan +2
The speed limits on entanglement are defined as the maximal rate at which entanglement can be generated or degraded in a physical process. We derive the speed limits on entanglemen…