165 citations · 1.4k across the 75 of their papers we have counts for
3 papers · 2 filters
Separability bounds on multiqubit moments due to positivity under partial transpose
A R Usha Devi, A K Rajagopal
Positivity of the density operator reflects itself in terms of sequences of inequalities on observable moments. Uncertainty relations for non-commuting observables form a subset of…
Distinctive subdynamic features of bipartite systems
A. K. Rajagopal, A. R. Usha Devi, R. W. Rendell +1
There are several important bipartite systems of great interest in condensed matter physics and in quantum information science. In condensed matter systems, the subsystems are exam…
A scheme for amplification and discrimination of photons
A. R. Usha Devi, R. Prabhu, A. K. Rajagopal
A scheme for exploring photon number amplification and discrimination is presented based on the interaction of a large number of two-level atoms with a single mode radiation field.…