40 citations · 98 across the 4 of their papers we have counts for
4 papers
Non-classicality of photon added coherent and thermal radiations
A. R. Usha Devi, R. Prabhu, M. S. Uma
Production and analysis of non-Gaussian radiation fields has evinced a lot of attention recently. Simplest way of generating such non-Gaussians is through adding (subtracting) phot…
Constraints on the uncertainties of entangled symmetric qubits
A. R. Usha Devi, M. S. Uma, R. Prabhu +1
We derive necessary and sufficient inseparability conditions imposed on the variance matrix of symmetric qubits. These constraints are identified by examining a structural parallel…
Local Invariants and Pairwise Entanglement in Symmetric Multi-qubit System
A. R. Usha Devi, M. S. Uma, R. Prabhu +1
Pairwise entanglement properties of a symmetric multi-qubit system are analyzed through a complete set of two-qubit local invariants. Collective features of entanglement, such as s…
Non-local properties of a symmetric two-qubit system
A. R. Usha Devi, M. S. Uma, R. Prabhu +1
Non-local properties of symmetric two-qubit states are quantified in terms of a complete set of entanglement invariants. We prove that negative values of some of the invariants are…