
2013 

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Equivalence of classicality and separability based on Pphase space representation of symmetric multiqubit states  A.R. Usha Devi, A. K. Rajagopal  Quantum Information Processing  arXiv:1306.2825[pdf]  2013 
Inversion of moments to retrieve joint probabilities in quantum sequential measurements  H. S. Karthik, Hemant Katiyar, Abhishek Shukla, T. S. Mahesh, A. R. Usha Devi, A. K. Rajagopal  PRA 87, 052118  quantph  2013 

2012 

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Interplay of quantum stochastic and dynamical maps to discern markovianity  A. R. Usha Devi, Sudha, R. W. Rendell  J. Qu. Info. Sci.,2, 47  quantph  2012 
Macrorealism from entropic LeggettGarg inequalities  A. R. Usha Devi, H. S. Karthik, Sudha, A. K. Rajagopal  PRA 87, 052103 (2013)  quantph  2012 
Monogamy of quantum correlations in three qubit pure states using RajagopalRendell quantum deficit  Sudha, A. R. Usha Devi, A. K. Rajagopal  Phys. Rev. A85 012103  quantph  2012 
Quantum discord and classical correlation can tighten the uncertainty principle in the presence of quantum memory  Arun Kumar Pati, Mark M. Wilde, A. R. Usha Devi, A. K. Rajagopal, Sudha  Phys. Rev. A 86, 042105  quantph  2012 
Quantum reading of digital memory with nonGaussian entangled light  J. Prabhu Tej, A. R. Usha Devi, A. K. Rajagopal  PRA87, 052308 (2013)  quantph  2012 

2011 

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Majorana representation of symmetric multiqubit states  A.R. Usha Devi, Sudha, A.K.Rajagopal  Quantum Information Processing, Vol. 11, Issue 3, pp 685710 (2012)  quantph  2011 
Opensystem quantum dynamics with correlated initial states, not completely positive maps, and nonMarkovianity  A. R. Usha Devi, A. K. Rajagopal, Sudha  Phys. Rev. A 83, 022109  quantph  2011 
Quantum dynamical maps and Markovianity  A. R. Usha Devi, A. K. Rajagopal, Sudha   quantph  2011 
Quantumness of correlations and entanglement  A. R. Usha Devi, A. K. Rajagopal, Sudha  Int. J. Quantum Inform. 09, 1757  quantph  2011 

2010 

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Determining the whole pure symmetric Nqubit state from its parts  A R Usha Devi, Sudha, A. K. Rajagopal   quantph  2010 
Entropic characterization of separability in Gaussian states  Sudha, A. R. Usha Devi, A. K. Rajagopal  Phys. Rev. A 81, 024303  quantph  2010 
Interconvertibility and irreducibility of permutation symmetric three qubit pure states  A R Usha Devi, Sudha, A K Rajagopal   quantph  2010 
Kraus representation of quantum evolution and fidelity as manifestations of Markovian and nonMarkovian forms  A. K. Rajagopal, A. R. Usha Devi, R. W. Rendell  Phys. Rev. A 82, 042107  quantph  2010 
Thermostatistical aspect of Wernertype states and quantum entanglement  Sumiyoshi Abe, A. R. Usha Devi, A. K. Rajagopal  J. Phys. A: Math. Theor. 43, 045303  quantph  2010 

2009 

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Dynamical evolution of quantum oscillators toward equilibrium  A. R. Usha Devi, A. K. Rajagopal  Phys. Rev. E 80, 011136  quantph  2009 
Quantum target detection using entangled photons  A. R. Usha Devi, A. K. Rajagopal  Phys. Rev. A 79, 062320  quantph  2009 

2008 

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A POVM view of the ensemble approach to polarization optics  Sudha, A.V. Gopala Rao, A. R. Usha Devi, A.K. Rajagopal  J. Opt. Soc. Am. A 25, 874  quantph  2008 
A scheme for amplification and discrimination of photons  A. R. Usha Devi, R. Prabhu, A. K. Rajagopal  J. Phys. B: Atomic, Molecular, & Optical Physics, 41, 235501  quantph  2008 
Distinctive subdynamics features of bipartite systems  A.K. Rajagopal, A. R. Usha Devi, R. W. Rendell, Michael Steiner   quantph  2008 
Generalized Information Theoretic Measure to Discern the Quantumness of Correlations  A. R. Usha Devi, A. K. Rajagopal  Phys. Rev. Lett. 100, 140502  quantph  2008 
Quantum Mechanical Basis of Vision, by Ramakrishna Chakravarthi  A. R. Usha Devi, A. K. Rajagopal  Proceedings (Neurons and Cognition) of the IndiaUS Workshop on Science and Technology at the NaboBio Interface, Bhubaneswar, India February 1922  quantph  2008 
Separability bounds on multiqubit moments due to positivity under partial transpose  A. R. Usha Devi, A. K. Rajagopal  Phys. Rev. A 78, 062334  quantph  2008 

2007 

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Characterizing Multiparticle Entanglement in Symmetric NQubit States via Negativity of Covariance Matrices  A. R. Usha Devi, R. Prabhu, A. K. Rajagopal  Phys. Rev. Lett. 98, 060501  quantph  2007 
Collective multipolelike signatures of entanglement in symmetric Nqubit systems  A. R. Usha Devi, R. Prabhu, A. K. Rajagopal  Phys. Rev. A 76, 012322  quantph  2007 
Constraints on the uncertainties of entangled symmetric qubits  A. R. Usha Devi, M. S. Uma, R. Prabhu, A. K. Rajagopal  Phys. Lett. A 364, 203  quantph  2007 
Separability of a family of oneparameter W and GreenbergerHorneZeilinger multiqubit states using the AbeRajagopal qconditionalentropy approach  R. Prabhu, A. R. Usha Devi, G. Padmanabha  Phys. Rev. A 76, 042337  quantph  2007 