165 citations · 649 across the 38 of their papers we have counts for
39 papers
Geometric picture for SLOCC classification of pure permutation symmetric three-qubit states
K. Anjali, I. Reena, Sudha +4
The quantum steering ellipsoid inscribed inside the Bloch sphere offers an elegant geometric visualization of two-qubit states shared between Alice and Bob. The set of Bloch vector…
Geometric picture for SLOCC classification of pure permutation symmetric three-qubit states
K. Anjali, I. Reena, Sudha +4
We show that the pure entangled three-qubit symmetric states which are inequivalent under stochastic local operations and classcial communication (SLOCC) exhibit distinct geometric…
Margenau-Hill operator valued measures and joint measurability
Seeta Vasudevrao, H. S. Karthik, I. Reena +2
We employ the Margenau-Hill (MH) correspondence rule for associating classical functions with quantum operators to construct quasi-probability mass functions. Using this we obtain…
Canonical structures of and forms
Sudha, B. N. Karthik, A. R. Usha Devi +1
In their seminal paper (Phys. Rev.121, 920 (1961)) Sudarshan, Mathews and Rau investigated properties of the dynamical and maps acting on dimensional quantum systems. N…
Local sum uncertainty relations for angular momentum operators of bipartite permutation symmetric systems
I. Reena, H. S. Karthik, J. Prabhu Tej +3
We show that violation of variance based local sum uncertainty relation (LSUR) for angular momentum operators of a bipartite system, proposed by Hofmann and Takeuchi~[Phys.Rev.A {\…
Heat exchange and fluctuation in Gaussian thermal states in the quantum realm
A R Usha Devi, Sudha, A. K. Rajagopal +1
The celebrated exchange fluctuation theorem -- proposed by Jarzynski and Wózcik, (Phys Rev. Lett. 92, 230602 (2004)) for heat exchange between two systems in thermal equilibrium at…
Characterizing nonlocality of pure symmetric three-qubit states
K. Anjali, Akshata Shenoy Hejamadi, H. S. Karthik +3
We explore nonlocality of three-qubit pure symmetric states shared between Alice, Bob and Charlie using the Clauser-Horne-Shimony-Holt (CHSH) inequality. We make use of the elegant…
Monogamous nature of symmetric multiqubt states with distinct spinors
Sudha, K. S. Akhilesh, B. G. Divyamani +2
Monogamy relations place restrictions on the shareability of quantum corellations in multipartite states. Being an intrinsic quantum feature, monogamy property throws light on {\em…
Spin squeezing in symmetric multiqubit states with two distinct Majorana spinors
K. S. Akhilesh, B. G. Divyamani, Shenoy Sudha +2
Majorana geometric representation of pure N-qubit states obeying exchange symmetry is em- ployed to explore spin squeezing properties in the family of states with two distinct spin…
One Parameter family of N-qudit Werner-Popescu states: Bipartite separability using conditional quantum relative Tsallis entropy
Anantha S. Nayak, Sudha, A. R. Usha Devi +1
The conditional version of sandwiched Tsallis relative entropy (CSTRE) is employed to study the bipartite separability of one parameter family of N-qudit Werner- Popescu states in…
From quantum stochastic differential equations to Gisin-Percival state diffusion
K. R. Parthasarathy, A. R. Usha Devi
Starting from the quantum stochastic differential equations of Hudson and Parthasarathy (Comm. Math. Phys. 93, 301 (1984)) and exploiting the Wiener-Ito-Segal isomorphism between t…
N term pairwise correlation inequalities, steering and joint measurability
H. S. Karthik, A. R. Usha Devi, J. Prabhu Tej +3
Chained correlation inequalities involving pairwise correlations of qubit observables in the equatorial plane are constructed based on the positivity of a sequence of moment matric…
Biseparability of noisy pseudopure, W and GHZ states using conditional quantum relative Tsallis entropy
Anantha S Nayak, Sudha, A. R. Usha Devi +1
We employ the conditional version of sandwiched Tsallis relative entropy to determine 1:N-1 separability range in the noisy one-parameter families of pseudopure and Werner-like N-q…
Joint measurability, steering and entropic uncertainty
H. S. Karthik, A. R. Usha Devi, A. K. Rajagopal
The notion of incompatibility of measurements in quantum theory is in stark contrast with the corresponding classical perspective, where all physical observables are jointly measur…
Joint Measurability and Temporal Steering
H. S. Karthik, J. Prabhu Tej, A. R. Usha Devi +1
Quintino et. al. (Phys. Rev. Lett. 113, 160402 (2014)) and Uola et. al. (Phys. Rev. Lett. 113, 160403 (2014)) have recently established an intrinsic relation between non-joint meas…
Bipartite separability of one parameter families of states using conditional quantum relative Tsallis entropy
Anantha S Nayak, Sudha, A. K. Rajagopal +1
In any bipartition of a quantum state, it is proved that the negative values of the conditional version of sandwiched Tsallis relative entropy necessarily implies quantum entanglem…
Quantum which-way information and fringe visibility when the detector is entangled with an ancilla
J. Prabhu Tej, A. R. Usha Devi, H. S. Karthik +2
Quantum mechanical wave-particle duality is quantified in terms of a trade-off relation between the fringe visibility and the which-way distinguishability in an interference experi…
Entropic uncertainty assisted by temporal memory
H. S. Karthik, A. R. Usha Devi, J. Prabhu Tej +1
The uncertainty principle brings out intrinsic quantum bounds on the precision of measuring non-commuting observables. Statistical outcomes in the measurement of incompatible obser…
From the sandwiched quantum relative Tsallis entropy to its conditional form: Separability criterion beyond local and global spectra
A. K. Rajagopal, Sudha, Anantha S Nayak +1
The quantum relative Renyi entropy of two density matrices was recently extended when the two do not commute, from which a conditional entropy is identified. This is here extended…
Equivalence of classicality and separability based on P phase-space representation of symmetric multiqubit states
A R Usha Devi, A K Rajagopal, Sudha +2
Classical and quantum world views differ in peculiar ways. Understanding decisive quantum features -- for which no classical explanation exist -- and their interrelations is of fou…
Inversion of moments to retrieve joint probabilities in quantum sequential measurements
H. S. Karthik, Hemant Katiyar, Abhishek Shukla +3
A sequence of moments encode the corresponding probability distribution. Probing if quantum joint probability distribution can be retrieved from the associated set of moments -- re…
Non-Markovianity and Clauser-Horne-Shimony-Holt (CHSH)-Bell inequality violation in quantum dissipative systems
A. Thilagam, A. R. Usha Devi
We examine the non-Markovian dynamics in a multipartite system of two initially correlated atomic qubits, each located in a single-mode leaky cavity and interacting with its own bo…
Quantum reading of digital memory with non-Gaussian entangled light
J. Prabhu Tej, A. R. Usha Devi, A. K. Rajagopal
It has been shown recently (Phys. Rev. Lett. 106, 090504 (2011)) that entangled light with Einstein-Podolsky-Rosen (EPR) correlations retrieves information from digital memory bett…
Macrorealism from entropic Leggett-Garg inequalities
A. R. Usha Devi, H. S. Karthik, Sudha +1
We formulate entropic Leggett-Garg inequalities, which place constraints on the statistical outcomes of temporal correlations of observables. The information theoretic inequalities…