165 citations
- Inspire InstituteUS50 papers
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5 papers · 1 filter
Characterization of entanglement in multiqubit systems via spin squeezing
M. S. Uma
Quantum entanglement reflects itself through non-local correlations among the subsystems of a quantum system. This thesis focuses on constructing a complete set of local invariants…
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…
The thermostatistical aspect of Werner-type states and quantum entanglement
Sumiyoshi Abe, A. R. Usha Devi, A. K. Rajagopal
A general Werner-type state is studied from two viewpoints: (i) an application of dynamical interaction of the objective system with its environment, represented by a unital positi…
Omega meson production in pp collisions with a polarized beam
J. Balasubramanyam, Venkataraya, G. Ramachandran
Model independent formulae are derived for the beam analyzing power and beam to meson spin transfers in taking into consideration all the six threshold partial…
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.…