50 citations · 76 across the 7 of their papers we have counts for
4 papers · 1 filter
Estimation of pure qubits on circles
Samuel L. Braunstein, Sibasish Ghosh, Simone Severini
Gisin and Popescu [PRL, 83, 432 (1999)] have shown that more information about their direction can be obtained from a pair of anti-parallel spins compared to a pair of parallel spi…
The laplacian of a graph as a density matrix: a basic combinatorial approach to separability of mixed states
Samuel L. Braunstein, Sibasish Ghosh, Simone Severini
We study entanglement properties of mixed density matrices obtained from combinatorial Laplacians. This is done by introducing the notion of the density matrix of a graph. We chara…
Non-full rank bound entangled states satisfying the range criterion
Somshubhro Bandyopadhyay, Sibasish Ghosh, Vwani Roychowdhury
A systematic method for generating bound entangled states in any bipartite system, with ranks ranging from five to full rank, is presented. These states are constructed by mixing s…
Locally Accessible Information and Distillation of Entanglement
Sibasish Ghosh, Pramod Joag, Guruprasad Kar +2
A new type of complementary relation is found between locally accessible information and final average entanglement for given ensemble. It is also shown that in some well known dis…