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• Sudha, K.S.Akhilesh, B.G.Divyamani, A.R. Usha Devi and K.S. Mallesh, Monogamous nature of Dicke-class of states with two distinct Majorana spinors , Quantum Information Processing, 19, 35(1)—35(19), 2020

  
  
  

• K.S.Akhilesh, B.G.Divyamani, Sudha, A.R. Usha Devi and K.S. Mallesh, Spin Squeezing in symmetric multiqubit states with two non-orthogonal spinors, Quantum Information Processing, 18, 144(1)—144(15), 2019

  
  
  

• Anantha S. Nayak, Sudha, A. R. Usha Devi and A. K. Rajagopal, One parameter Family of Werner-Popescu states: Bipartite Separability using Conditional Quantum Relative Tsallis Entropy, Journal of Quantum Information Science, Vol 8, 12–23 , arXiv:1712.00746, 2018

  
  
  

• K. R. Parthasarathy and A. R. Usha Devi, Asymptotic spectral stability of the Gisin-Percival state diffusion, arXiv:1707.08157, 2017

  
  
  

• Anantha S. Nayak, Sudha, A. R. Usha Devi and A. K. Rajagopal, Biseparability of noisy pseudopure, W and GHZ states using conditional quantum relative Tsallis entropy, Quantum Information Processing, 16, 51(1—12), 2017

  
  
  

• H.S. Karthik, A.R. Usha Devi, J. Prabhu Tej, A. K. Rajagopal, Sudha and A. Narayanan, N-term pairwise-correlation inequalities, steering, and joint measurability , Physical Review A, 95, 052105 , 2017

  
  
  

• K. R. Parthasarathy and A. R. Usha Devi, From quantum stochastic differential equations to Gisin-Percival state diffusion, Journal of Mathematical Physics 58, 082204, arXiv:1705.00520, 2017

  
  
  

• K. R. Parthasarathy and A. R. Usha Devi, Asymptotic spectral stability of the Gisin-Percival state diffusion, arXiv:1707.08157, 2017

  
  
  

• Anantha S. Nayak, Sudha, A. K. Rajagopal and A.R. Usha Devi, Bipartite separability of symmetric N-qubit noisy states using conditional quantum relative Tsallis entropy, Physica A, 443, 286–295 , 2016

  
  
  

• Divyamani B.G, Sudha and A.R. Usha Devi, Local Unitary Invariant Spin-Squeezing in Multiqubit States , International Journal of Theoretical Physics, Vol. 55, No. 5, 2324–233, 2016

  
  
  

• H. S. Karthik, J. Prabhu Tej, A. R. Usha Devi and A. K. Rajagopal, Joint measurability and temporal steering, J. Opt. Soc. Am. B, 32, A34-A38, arXiv:1412.0871, 2015

  
  
  

• H. S. Karthik, A. R. Usha Devi, A. K. Rajagopal, Unsharp measurements and joint measurability, Current Science, (SPECIAL SECTION: QUANTUM MEASUREMENTS), 109, NO. 11, 10, arXiv:1505.04246, 2015

  
  
  

• P.J. Geetha, Sudha and A.R.Usha Devi , What Does Monogamy in Higher Powers of a Correlation Measure Mean? , Journal of Modern Physics, 5, 1294, 2014

  
  
  

• J. Prabhu Tej, H.S. Karthik, A.R. Usha Devi, Sudha and A.K. Rajagopal, Quantum which-way information and fringe visibility when the detector is entangled with an ancilla , Physical Review A, 89, 062116, 2014

  
  
  

• A.K. Rajagopal, Sudha, Anantha S Nayak, A.R. Usha Devi, From the sandwiched quantum relative Tsallis entropy to its conditional form: Separability criterion beyond local and global spectra, Phys. Rev. A, 89, 012331, arXiv:1309.6944, 2014

  
  
  

• A.R. Usha Devi, A. K. Rajagopal, Sudha, H. S. Karthik and J. Prabhu Tej, Equivalence of classicality and separability based on P phase–space representation of symmetric multiqubit states , Quantum Information Processing, 12, 3717-3723 , 2013

  
  
  

• H. S. Karthik, Hemant Katiyar, Abhishek Shukla, T. S. Mahesh, A. R. Usha Devi, A. K. Rajagopal, Inversion of moments to retrieve joint probabilities in quantum sequential measurements, PRA 87, 052118, http://arxiv.org/pdf/1304.0058v2.pdf, 2013

  
  
  

• A. K. Rajagopal, Sudha, Anantha S. Nayak and A.R. Usha Devi, From the quantum relative Tsallis entropy to its conditional form: Separability criterion beyond local and global spectra, Physical Review A, 89, 012331 , 2013

  
  
  

• A. R. Usha Devi, Sudha, R. W. Rendell, Interplay of quantum stochastic and dynamical maps to discern markovianity, J. Qu. Info. Sci.,2, 47, http://arxiv.org/pdf/1201.0477v1.pdf, 2012

  
  
  

• A. R. Usha Devi, H. S. Karthik, Sudha, A. K. Rajagopal, Macrorealism from entropic Leggett-Garg inequalities, PRA 87, 052103 (2013), http://arxiv.org/pdf/1208.4491v3.pdf, 2012

  
  
  

• Sudha, A. R. Usha Devi, A. K. Rajagopal, Monogamy of quantum correlations in three qubit pure states using Rajagopal-Rendell quantum deficit, Phys. Rev. A85 012103, http://arxiv.org/pdf/1110.3026v1.pdf, 2012

  
  
  

• Arun Kumar Pati, Mark M. Wilde, A. R. Usha Devi, A. K. Rajagopal, Sudha, Quantum discord and classical correlation can tighten the uncertainty principle in the presence of quantum memory, Phys. Rev. A 86, 042105, http://arxiv.org/pdf/1204.3803v3.pdf, 2012

  
  
  

• J. Prabhu Tej, A. R. Usha Devi, A. K. Rajagopal, Quantum reading of digital memory with non-Gaussian entangled light, PRA87, 052308 (2013), http://arxiv.org/pdf/1210.0791v2.pdf, 2012

  
  
  

• A. Thilagam, A. R. Usha Devi, Non-Markovianity and Clauser-Horne-Shimony-Holt (CHSH)-Bell inequality violation in quantum dissipative systems, J. Chem. Phys., 137, 215103, arXiv:1210.5291, 2012

  
  
  

• A. R. Usha Devi, H. S. Karthik, Uncertainty relations in the realm of classical dynamics, Am. J. Phys. 80, 708, arXiv:1108.2682, 2012

  
  
  

• A.R. Usha Devi, Sudha, A.K.Rajagopal, Majorana representation of symmetric multiqubit states, Quantum Information Processing, Vol. 11, Issue 3, pp 685-710 (2012), http://arxiv.org/pdf/1103.3640, 2011

  
  
  

• A. R. Usha Devi, A. K. Rajagopal, Sudha, Open-system quantum dynamics with correlated initial states, not completely positive maps, and non-Markovianity, Phys. Rev. A 83, 022109, http://arxiv.org/pdf/1011.0621, 2011

  
  
  

• A. R. Usha Devi, A. K. Rajagopal, Sudha, Quantum dynamical maps and Markovianity, http://arxiv.org/pdf/1104.4566, 2011

  
  
  

• A. R. Usha Devi, A. K. Rajagopal, Sudha, Quantumness of correlations and entanglement, Int. J. Quantum Inform. 09, 1757, http://arxiv.org/pdf/1105.4115, 2011

  
  
  

• A. R. Usha Devi and Sudha, Spin Squeezing and Quantum Correlations, Asian J. Phys 20,131, arXiv:1101.0308, 2011

  
  
  

• Sudha, B. G. Divyamani and A. R. Usha Devi, Loss of exchange symmetry in multiqubit states under Ising chain evolution, Chinese Physics Letters, 28, 020305, 2011

  
  
  

• A R Usha Devi, Sudha, A. K. Rajagopal, Determining the whole pure symmetric N-qubit state from its parts, http://arxiv.org/pdf/1003.2450, 2010

  
  
  

• Sudha, A. R. Usha Devi, A. K. Rajagopal, Entropic characterization of separability in Gaussian states, Phys. Rev. A 81, 024303, http://arxiv.org/pdf/0909.1087, 2010

  
  
  

• A R Usha Devi, Sudha, A K Rajagopal, Interconvertibility and irreducibility of permutation symmetric three qubit pure states, http://arxiv.org/pdf/1002.2820, 2010

  
  
  

• A. K. Rajagopal, A. R. Usha Devi, R. W. Rendell, Kraus representation of quantum evolution and fidelity as manifestations of Markovian and non-Markovian forms, Phys. Rev. A 82, 042107, http://arxiv.org/pdf/1007.4498, 2010

  
  
  

• Sumiyoshi Abe, A. R. Usha Devi, A. K. Rajagopal, Thermostatistical aspect of Werner-type states and quantum entanglement, J. Phys. A: Math. Theor. 43, 045303, http://arxiv.org/pdf/0803.1430, 2010

  
  
  

• A. R. Usha Devi, A. K. Rajagopal, Dynamical evolution of quantum oscillators toward equilibrium, Phys. Rev. E 80, 011136, http://arxiv.org/pdf/0901.1453, 2009

  
  
  

• A. R. Usha Devi, A. K. Rajagopal, Quantum target detection using entangled photons, Phys. Rev. A 79, 062320, http://arxiv.org/pdf/0903.3876, 2009

  
  
  

• Sudha, A.V. Gopala Rao, A. R. Usha Devi, A.K. Rajagopal, A POVM view of the ensemble approach to polarization optics, J. Opt. Soc. Am. A 25, 874, http://arxiv.org/pdf/0704.0147, 2008

  
  
  

• A. R. Usha Devi, R. Prabhu, A. K. Rajagopal, A scheme for amplification and discrimination of photons, J. Phys. B: Atomic, Molecular, & Optical Physics, 41, 235501, http://arxiv.org/pdf/0802.2315, 2008

  
  
  

• A.K. Rajagopal, A. R. Usha Devi, R. W. Rendell, Michael Steiner, Distinctive sub-dynamics features of bipartite systems, http://arxiv.org/pdf/0807.1672, 2008

  
  
  

• A. R. Usha Devi, A. K. Rajagopal, Generalized Information Theoretic Measure to Discern the Quantumness of Correlations, Phys. Rev. Lett. 100, 140502, http://arxiv.org/pdf/0707.2195, 2008

  
  
  

• A. R. Usha Devi, A. K. Rajagopal, Quantum Mechanical Basis of Vision, by Ramakrishna Chakravarthi, Proceedings (Neurons and Cognition) of the India-US Workshop on Science and Technology at the Nabo-Bio Interface, Bhubaneswar, India February 19-22, http://arxiv.org/pdf/0804.0190, 2008

  
  
  

• A. R. Usha Devi, A. K. Rajagopal, Separability bounds on multiqubit moments due to positivity under partial transpose, Phys. Rev. A 78, 062334, http://arxiv.org/pdf/0808.2581, 2008

  
  
  

• A. R. Usha Devi, R. Prabhu, A. K. Rajagopal, Characterizing Multiparticle Entanglement in Symmetric N-Qubit States via Negativity of Covariance Matrices, Phys. Rev. Lett. 98, 060501, http://arxiv.org/pdf/quant-ph/0609055v3.pdf, 2007

  
  
  

• A. R. Usha Devi, R. Prabhu, A. K. Rajagopal, Collective multipolelike signatures of entanglement in symmetric N-qubit systems, Phys. Rev. A 76, 012322, http://arxiv.org/pdf/quant-ph/0612210, 2007

  
  
  

• A. R. Usha Devi, M. S. Uma, R. Prabhu, A. K. Rajagopal, Constraints on the uncertainties of entangled symmetric qubits, Phys. Lett. A 364, 203, http://arxiv.org/pdf/quant-ph/0601035v4.pdf, 2007

  
  
  

• R. Prabhu, A. R. Usha Devi, G. Padmanabha, Separability of a family of one-parameter W and Greenberger-Horne-Zeilinger multiqubit states using the Abe-Rajagopal q-conditional-entropy approach, Phys. Rev. A 76, 042337, http://arxiv.org/pdf/0706.3038, 2007