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A. R. Usha Devi


 
usha.thirthahalli@inspireinstitute.org

Biography

Research Interests

Honors

Professional Affiliations

Paper Publications

2013
Paper Title Authors Journal Reference Archive Reference Year
Equivalence of classicality and separability based on P-phase space representation of symmetric multiqubit statesA.R. Usha Devi, A. K. Rajagopal Quantum Information Processing arXiv:1306.2825[pdf]2013
Inversion of moments to retrieve joint probabilities in quantum sequential measurementsH. S. Karthik, Hemant Katiyar, Abhishek Shukla, T. S. Mahesh, A. R. Usha Devi, A. K. Rajagopal PRA 87, 052118 quant-ph2013
2012
Paper Title Authors Journal Reference Archive Reference Year
Interplay of quantum stochastic and dynamical maps to discern markovianityA. R. Usha Devi, Sudha, R. W. Rendell J. Qu. Info. Sci.,2, 47 quant-ph2012
Macrorealism from entropic Leggett-Garg inequalitiesA. R. Usha Devi, H. S. Karthik, Sudha, A. K. Rajagopal PRA 87, 052103 (2013) quant-ph2012
Monogamy of quantum correlations in three qubit pure states using Rajagopal-Rendell quantum deficitSudha, A. R. Usha Devi, A. K. Rajagopal Phys. Rev. A85 012103 quant-ph2012
Quantum discord and classical correlation can tighten the uncertainty principle in the presence of quantum memoryArun Kumar Pati, Mark M. Wilde, A. R. Usha Devi, A. K. Rajagopal, Sudha Phys. Rev. A 86, 042105 quant-ph2012
Quantum reading of digital memory with non-Gaussian entangled lightJ. Prabhu Tej, A. R. Usha Devi, A. K. Rajagopal PRA87, 052308 (2013) quant-ph2012
2011
Paper Title Authors Journal Reference Archive Reference Year
Majorana representation of symmetric multiqubit statesA.R. Usha Devi, Sudha, A.K.Rajagopal Quantum Information Processing, Vol. 11, Issue 3, pp 685-710 (2012) quant-ph2011
Open-system quantum dynamics with correlated initial states, not completely positive maps, and non-MarkovianityA. R. Usha Devi, A. K. Rajagopal, Sudha Phys. Rev. A 83, 022109 quant-ph2011
Quantum dynamical maps and MarkovianityA. R. Usha Devi, A. K. Rajagopal, Sudha quant-ph2011
Quantumness of correlations and entanglementA. R. Usha Devi, A. K. Rajagopal, Sudha Int. J. Quantum Inform. 09, 1757 quant-ph2011
2010
Paper Title Authors Journal Reference Archive Reference Year
Determining the whole pure symmetric N-qubit state from its partsA R Usha Devi, Sudha, A. K. Rajagopal quant-ph2010
Entropic characterization of separability in Gaussian statesSudha, A. R. Usha Devi, A. K. Rajagopal Phys. Rev. A 81, 024303 quant-ph2010
Interconvertibility and irreducibility of permutation symmetric three qubit pure statesA R Usha Devi, Sudha, A K Rajagopal quant-ph2010
Kraus representation of quantum evolution and fidelity as manifestations of Markovian and non-Markovian formsA. K. Rajagopal, A. R. Usha Devi, R. W. Rendell Phys. Rev. A 82, 042107 quant-ph2010
Thermostatistical aspect of Werner-type states and quantum entanglementSumiyoshi Abe, A. R. Usha Devi, A. K. Rajagopal J. Phys. A: Math. Theor. 43, 045303 quant-ph2010
2009
Paper Title Authors Journal Reference Archive Reference Year
Dynamical evolution of quantum oscillators toward equilibriumA. R. Usha Devi, A. K. Rajagopal Phys. Rev. E 80, 011136 quant-ph2009
Quantum target detection using entangled photonsA. R. Usha Devi, A. K. Rajagopal Phys. Rev. A 79, 062320 quant-ph2009
2008
Paper Title Authors Journal Reference Archive Reference Year
A POVM view of the ensemble approach to polarization opticsSudha, A.V. Gopala Rao, A. R. Usha Devi, A.K. Rajagopal J. Opt. Soc. Am. A 25, 874 quant-ph2008
A scheme for amplification and discrimination of photonsA. R. Usha Devi, R. Prabhu, A. K. Rajagopal J. Phys. B: Atomic, Molecular, & Optical Physics, 41, 235501 quant-ph2008
Distinctive sub-dynamics features of bipartite systemsA.K. Rajagopal, A. R. Usha Devi, R. W. Rendell, Michael Steiner quant-ph2008
Generalized Information Theoretic Measure to Discern the Quantumness of CorrelationsA. R. Usha Devi, A. K. Rajagopal Phys. Rev. Lett. 100, 140502 quant-ph2008
Quantum Mechanical Basis of Vision, by Ramakrishna ChakravarthiA. R. Usha Devi, A. K. RajagopalProceedings (Neurons and Cognition) of the India-US Workshop on Science and Technology at the Nabo-Bio Interface, Bhubaneswar, India February 19-22 quant-ph2008
Separability bounds on multiqubit moments due to positivity under partial transposeA. R. Usha Devi, A. K. Rajagopal Phys. Rev. A 78, 062334 quant-ph2008
2007
Paper Title Authors Journal Reference Archive Reference Year
Characterizing Multiparticle Entanglement in Symmetric N-Qubit States via Negativity of Covariance MatricesA. R. Usha Devi, R. Prabhu, A. K. Rajagopal Phys. Rev. Lett. 98, 060501 quant-ph2007
Collective multipolelike signatures of entanglement in symmetric N-qubit systemsA. R. Usha Devi, R. Prabhu, A. K. Rajagopal Phys. Rev. A 76, 012322 quant-ph2007
Constraints on the uncertainties of entangled symmetric qubitsA. R. Usha Devi, M. S. Uma, R. Prabhu, A. K. Rajagopal Phys. Lett. A 364, 203 quant-ph2007
Separability of a family of one-parameter W and Greenberger-Horne-Zeilinger multiqubit states using the Abe-Rajagopal q-conditional-entropy approachR. Prabhu, A. R. Usha Devi, G. Padmanabha Phys. Rev. A 76, 042337 quant-ph2007

Paper Presentations