9 citations · 17 across the 6 of their papers we have counts for
7 papers
Noncommutative Marcus-Ree inequality and Erdős channels
Repana Devendra, Chaman Kumar Sahu
Unital quantum channels are the noncommutative analogues of doubly stochastic matrices. In 1959, Marcus and Ree showed that the squared Frobenius norm of a doubly stochastic matrix…
On regions of mixed unitarity for semigroups of unital quantum channels
B V Rajarama Bhat, Repana Devendra
It is established that both discrete and continuous semigroups of unital quantum channels are eventually mixed unitary. This result is novel even for the subclass of Schur maps and…
What is a Gaussian channel, and when is it physically implementable using a multiport interferometer?
Repana Devendra, Tiju Cherian John, K. Sumesh
Quantum Gaussian channels are fundamental models for communication and information processing in continuous-variable quantum systems. This work addresses both foundational aspects…
On the rank of extremal marginal states
Repana Devendra, Pankaj Dey, Santanu Dey
Let and be two states on and respectively. The marginal state space, denoted by , is the set of all states $…
Degradable Strongly Entanglement Breaking Maps
Repana Devendra, Gunjan sapra, K. Sumesh
In this paper, we provide a structure theorem and various characterizations of degradable strongly entanglement breaking maps on separable Hilbert spaces. In the finite dimensional…
-extreme points of entanglement breaking maps
B. V. Rajarama Bhat, Repana Devendra, Nirupama Mallick +1
In this paper we study the -convex set of unital entanglement breaking (EB-)maps on matrix algebras. General properties and an abstract characterization of -extreme point…
Mapping cone of -Entanglement Breaking Maps
Repana Devendra, Nirupama Mallick, K. Sumesh
In \cite{CMW19}, the authors introduced -entanglement breaking linear maps to understand the entanglement breaking property of completely positive maps on taking composition. In…