Members Publications

List of Publications

2013
Equivalence of classicality and separability based on P-phase 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 cond-mat (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 quant-ph (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 quant-ph (2012)
Macrorealism from entropic Leggett-Garg inequalities
A. R. Usha Devi, H. S. Karthik, Sudha, A. K. Rajagopal
PRA 87, 052103 (2013) quant-ph (2012)
Monogamy of quantum correlations in three qubit pure states using Rajagopal-Rendell quantum deficit
Sudha, A. R. Usha Devi, A. K. Rajagopal
Phys. Rev. A85 012103 quant-ph (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) quant-ph (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 quant-ph (2012)
Quantum reading of digital memory with non-Gaussian entangled light
J. Prabhu Tej, A. R. Usha Devi, A. K. Rajagopal
PRA87, 052308 (2013) quant-ph (2012)
2011
Local probability model for the Bell correlation based on the statistics of chaotic light and non-commutative processes
Louis Sica
quant-ph (2011)
Majorana representation of symmetric multiqubit states
A.R. Usha Devi, Sudha, A.K.Rajagopal
Quantum Information Processing, Vol. 11, Issue 3, pp 685-710 (2012) quant-ph (2011)
Maximum-power quantum-mechanical Carnot engine
Sumiyoshi Abe
Phys. Rev. E 83, 041117 quant-ph (2011)
Open-system quantum dynamics with correlated initial states, not completely positive maps, and non-Markovianity
A. R. Usha Devi, A. K. Rajagopal, Sudha
Phys. Rev. A 83, 022109 quant-ph (2011)
Quantum dynamical maps and Markovianity
A. R. Usha Devi, A. K. Rajagopal, Sudha
quant-ph (2011)
Quantumness of correlations and entanglement
A. R. Usha Devi, A. K. Rajagopal, Sudha
Int. J. Quantum Inform. 09, 1757 quant-ph (2011)
Similarity between quantum mechanics and thermodynamics: Entropy, temperature, and Carnot cycle
Sumiyoshi Abe, S. Okuyama
Phys. Rev. E 83, 021121 quant-ph (2011)
2010
Determining the whole pure symmetric N-qubit state from its parts
A R Usha Devi, Sudha, A. K. Rajagopal
quant-ph (2010)
Entropic characterization of separability in Gaussian states
Sudha, A. R. Usha Devi, A. K. Rajagopal
Phys. Rev. A 81, 024303 quant-ph (2010)
Essential discreteness in generalized thermostatistics with non-logarithmic entropy
Sumiyoshi Abe
Europhys. Lett. 90, 50004 quant-ph (2010)
Fluctuations of entropy and log-normal superstatistics
Sumiyoshi Abe
Phys. Rev. E 82, 011131 quant-ph (2010)
Interconvertibility and irreducibility of permutation symmetric three qubit pure states
A R Usha Devi, Sudha, A K Rajagopal
quant-ph (2010)
Kraus representation of quantum evolution and fidelity as manifestations of Markovian and non-Markovian forms
A. K. Rajagopal, A. R. Usha Devi, R. W. Rendell
Phys. Rev. A 82, 042107 quant-ph (2010)
Reply to the Comment by B. Andresen
Sumiyoshi Abe
Europhys. Lett., 92, 40006 quant-ph (2010)
Statistical quantum operation
Sumiyoshi Abe, Y. Itto, M. Matsunaga
Mod. Phys. Lett. B 24, 2015-2020 quant-ph (2010)
Thermostatistical aspect of Werner-type states and quantum entanglement
Sumiyoshi Abe, A. R. Usha Devi, A. K. Rajagopal
J. Phys. A: Math. Theor. 43, 045303 quant-ph (2010)
2009
Anomalous behavior of q-averages in nonextensive statistical mechanics
Sumiyoshi Abe
Journal of Statistical Mechanics P07027 quant-ph (2009)
Dynamical evolution of quantum oscillators toward equilibrium
A. R. Usha Devi, A. K. Rajagopal
Phys. Rev. E 80, 011136 quant-ph (2009)
Generalized molecular chaos hypothesis and H-theorem: Problem of constraints and amendment of nonextensive statistical mechanics
Sumiyoshi Abe
Phys. Rev. E, 79 04116 quant-ph (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 heat-up operation and violation of the law of thermodynamics
Mozhgan Sabzehzari, Yuki Aoyaghi, Sumiyoshi Abe
quant-ph (2009)
Quantum target detection using entangled photons
A. R. Usha Devi, A. K. Rajagopal
Phys. Rev. A 79, 062320 quant-ph (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 quant-ph (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 quant-ph (2008)
Distinctive sub-dynamics features of bipartite systems
A.K. Rajagopal, A. R. Usha Devi, R. W. Rendell, Michael Steiner
quant-ph (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 quant-ph (2008)
Instability of q-expectation value
Sumiyoshi Abe
quant-ph (2008)
Macroscopic proof of the Jarzynski-Wojcik fluctuation theorem for heat exchange
Yuki Sugiyama, Sumiyoshi Abe
J. Stat. Mech. P05008 quant-ph (2008)
Quantum Mechanical Basis of Vision, by Ramakrishna Chakravarthi
A. R. Usha Devi, A. K. Rajagopal
Proceedings (Neurons and Cognition) of the India-US Workshop on Science and Technology at the Nabo-Bio Interface, Bhubaneswar, India February 19-22 quant-ph (2008)
Separability bounds on multiqubit moments due to positivity under partial transpose
A. R. Usha Devi, A. K. Rajagopal
Phys. Rev. A 78, 062334 quant-ph (2008)
When is Wegner's flow geodesic?
Yuichi Itto, Sumiyoshi Abe
quant-ph (2008)
2007
Characterizing Multiparticle Entanglement in Symmetric N-Qubit States via Negativity of Covariance Matrices
A. R. Usha Devi, R. Prabhu, A. K. Rajagopal
Phys. Rev. Lett. 98, 060501 quant-ph (2007)
Collective multipolelike signatures of entanglement in symmetric N-qubit systems
A. R. Usha Devi, R. Prabhu, A. K. Rajagopal
Phys. Rev. A 76, 012322 quant-ph (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 quant-ph (2007)
Separability of a family of one-parameter W and Greenberger-Horne-Zeilinger multiqubit states using the Abe-Rajagopal q-conditional-entropy approach
R. Prabhu, A. R. Usha Devi, G. Padmanabha
Phys. Rev. A 76, 042337 quant-ph (2007)
2006
Decoherence and fidelity of single-electron 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
cond-mat (2006)
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