114 citations · 150 across the 4 of their papers we have counts for
8 papers · 1 filter
CP-preserving channels
Indu Bala, Sourav Das, Swapan Rana
Completely positive (CP) matrices are ubiquitous in modern science and technology with applications in optimization, graph theory, and quantum entanglement. Recently, Johnston \emp…
Extremal Marginal States of Maximal Rank in
Indu Bala, Swapan Rana
We study the extreme points of the convex set of bipartite quantum states with fixed marginals and . We construct extreme points in di…
Resource theory of imaginarity: Quantification and state conversion
Kang-Da Wu, Tulja Varun Kondra, Swapan Rana +5
Complex numbers are widely used in both classical and quantum physics, and are indispensable components for describing quantum systems and their dynamical behavior. Recently, the r…
Operational Resource Theory of Imaginarity
Kang-Da Wu, Tulja Varun Kondra, Swapan Rana +5
Wave-particle duality is one of the basic features of quantum mechanics, giving rise to the use of complex numbers in describing states of quantum systems, their dynamics, and inte…
Entanglement negativity as a universal non-Markovianity witness
Jan Kolodynski, Swapan Rana, Alexander Streltsov
In order to engineer an open quantum system and its evolution, it is essential to identify and control the memory effects. These are formally attributed to the non-Markovianity of…
Optimal decomposition of incoherent qubit channel
Swapan Rana, Maciej Lewenstein
We show that any incoherent qubit channel could be decomposed into four incoherent Kraus operators. The proof consists in showing existence of four incoherent Kraus operators by de…