2013  
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) 

General pairing theory for condensed and noncondensed Cooper pairs of a superconductor in a high magnetic field Peter Scherpelz, Dan Wulin, Betislav Sopik, K. Levin, A. K. Rajagopal Phys. Rev. B 87, 024516 condmat (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  
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) 

Pseudogap effects of Fermi gases in the presence of a strong effective magnetic field Peter Scherpelz, Dan Wulin, K. Levin, A. K. Rajagopal Phys. Rev. A 87, 063602 (2013) 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  
Local probability model for the Bell correlation based on the statistics of chaotic light and noncommutative processes Louis Sica quantph (2011) 

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) 

Maximumpower quantummechanical Carnot engine Sumiyoshi Abe Phys. Rev. E 83, 041117 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) 

Similarity between quantum mechanics and thermodynamics: Entropy, temperature, and Carnot cycle Sumiyoshi Abe, S. Okuyama Phys. Rev. E 83, 021121 quantph (2011) 

2010  
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) 

Essential discreteness in generalized thermostatistics with nonlogarithmic entropy Sumiyoshi Abe Europhys. Lett. 90, 50004 quantph (2010) 

Fluctuations of entropy and lognormal superstatistics Sumiyoshi Abe Phys. Rev. E 82, 011131 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) 

Reply to the Comment by B. Andresen Sumiyoshi Abe Europhys. Lett., 92, 40006 quantph (2010) 

Statistical quantum operation Sumiyoshi Abe, Y. Itto, M. Matsunaga Mod. Phys. Lett. B 24, 20152020 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  
Anomalous behavior of qaverages in nonextensive statistical mechanics Sumiyoshi Abe Journal of Statistical Mechanics P07027 quantph (2009) 

Dynamical evolution of quantum oscillators toward equilibrium A. R. Usha Devi, A. K. Rajagopal Phys. Rev. E 80, 011136 quantph (2009) 

Generalized molecular chaos hypothesis and Htheorem: Problem of constraints and amendment of nonextensive statistical mechanics Sumiyoshi Abe Phys. Rev. E, 79 04116 quantph (2009) 

Measurement of a subsystem of a coupled quantum system Michael Steiner, M. Frey, A. Gulian, R. W. Rendell, A. K. Rajagopal Proc. SPIE, Vol. 7342, 73420F (2009) 

Quantum heatup operation and violation of the law of thermodynamics Mozhgan Sabzehzari, Yuki Aoyaghi, Sumiyoshi Abe quantph (2009) 

Quantum target detection using entangled photons A. R. Usha Devi, A. K. Rajagopal Phys. Rev. A 79, 062320 quantph (2009) 

2008  
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) 

Electron spin dynamics due to hyperfine coupling in quantum dots L. M. Woods, T. L. Reinecke, A. K. Rajagopal Phys. Rev. B 77, 073313 (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) 

Instability of qexpectation value Sumiyoshi Abe quantph (2008) 

Macroscopic proof of the JarzynskiWojcik fluctuation theorem for heat exchange Yuki Sugiyama, Sumiyoshi Abe J. Stat. Mech. P05008 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) 

When is Wegner's flow geodesic? Yuichi Itto, Sumiyoshi Abe quantph (2008) 

2007  
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) 

2006  
Decoherence and fidelity of singleelectron spin states in quantum dots: effects of nuclear hyperfine coupling and double occupancy A. K. Rajagopal, S. D. Mahanti, Sudhanshu S. Jha J. Physics: Condensed Matter 18, 10677 (2006) 

Superstatistics; a quantum generalization A. K. Rajagopal condmat (2006) 