48 citations · 281 across the 29 of their papers we have counts for
18 papers · 1 filter
Weak measurement as a tool for studying coherence and quantum correlations in bipartite systems
Indrajith V. S, R. Muthuganesan, R. Sankaranarayanan
In this article, we study quantum coherence of bipartite state from the perspective of weak measurement, which generalizes the notion of coherence relative to measurement. The is b…
Casimir interactions from infinite range and dilation symmetry
Venkat Abhignan, R. Sankaranarayanan
The Casimir interaction energy for a class of discrete self-similar configuration of parallel plates is evaluated using existing methods. The similarities to characteristics of an…
Fidelity based purity and coherence for quantum states
Indrajith V S, R. Muthuganesan, R. Sankaranarayanan
Purity and coherence of a quantum state are recognized as useful resources for various information processing tasks. In this article, we propose a fidelity based valid measure of p…
Measurement Induced Nonlocality Quantified by Hellinger Distance and weak measurements
Indrajith V S, R. Muthuganesan, R. Sankaranarayanan
In this article, we propose measurement-induced nonlocality (MIN) quantified by Hellinger distance using von Neumann projective measurement. The proposed MIN is a bonafide measure…
Quantum coherence and correlation measures based on affinity
R. Muthuganesan, V. K. Chandrasekar, R. Sankaranarayanan
Coherence and correlation are key features of the quantum system. Quantifying these quantities are astounding task in the framework of resource theory of quantum information proces…
Effect of environment in Heisenberg XYZ spin model
Indrajith. V. S, R. Sankaranarayanan
Quantum correlation of bipartite states (beyond entanglement) in presence of environment is studied for Heisenberg XYZ spin system. It is shown that if the system is allowed to exc…
Entanglement and Measurement-induced quantum correlation in Heisenberg spin models
Indrajith V S, R. Muthuganesan, R. Sankaranarayanan
Correlation beyond entanglement is a subject of interest in quantum information. Here we have shown the existence of quantum correlation without entanglement in Heisenberg sp…
Dynamics of measurement induced nonlocality under decoherence
R. Muthuganesan, R. Sankaranarayanan
Measurement Induced Nonlocality (MIN) captures nonlocal effects of a quantum state due to local von Neumann projective measurements, is a bonafide measure of quantum correlation be…
Fidelity based Measurement Induced Nonlocality over two-sided measurements
R. Muthuganesan, R. Sankaranarayanan
In this paper, we introduce quantum fidelity based measurement induced nonlocality for the bipartite state over two-sided von Neumann projective measurements. While all the propert…
Dynamics of X-state in anisotropic Heisenberg spin with magnetic field
N. Vinod, R. Muthuganesan, R. Sankaranarayanan
We study the dynamics of X-state for anisotropic Heisenberg spin system using quantum fidelity. It is shown that while Bell diagonal state, a special class of X-state, is stationar…
Fidelity based Measurement Induced Nonlocality and its dynamics in Quantum noisy channels
R. Muthuganesan, R. Sankaranarayanan
Measurement induced nonlocality (MIN) captures global nonlocal effect of bipartite quantum state due to locally invariant projective measurements. In this paper, we propose a new v…
Fidelity Based Measurement Induced Nonlocality
R. Muthuganesan, R. Sankararnarayanan
In this paper we propose measurement induced nonlocality (MIN) using a metric based on fidelity to capture global nonlocal effect of a quantum state due to locally invariant projec…
Nonlocal Correlation in Heisenberg Spin Models
R. Muthuganesan, R. Sankaranarayanan
In this paper we investigate the nonlocal correlation (beyond entanglement) captured by measurement induced nonlocality and geometric quantum discord for a pair of interacting spin…
Measures of operator entanglement of two-qubit gates
S. Balakrishnan, R. Sankaranarayanan
Two different measures of operator entanglement of two-qubit gates, namely, Schmidt strength and linear entropy, are studied. While these measures are shown to have one-to-one rela…
Operator-Schmidt decomposition and the geometrical edges of two-qubit gates
S. Balakrishnan, R. Sankaranarayanan
Nonlocal two-qubit quantum gates are represented by canonical decomposition or equivalently by operator-Schmidt decomposition. The former decomposition results in geometrical repre…
Entangling power and local invariants of two-qubit gates
S Balakrishnan, R Sankaranarayanan
We show a simple relation connecting entangling power and local invariants of two-qubit gates. From the relation, a general condition under which gates have same entangling power i…
Classification of nonlocal two-qubit gates using Schmidt number
S Balakrishnan, Leona J Felicia, R Sankaranarayanan
It is known from Schmidt decomposition that Schmidt number of nonlocal two-qubit quantum gates is 2 or 4. We identify conditions on geometrical points of a gate to have Schmidt num…
Characterizing the geometrical edges of nonlocal two-qubit gates
S. Balakrishnan, R. Sankaranarayanan
Nonlocal two-qubit gates are geometrically represented by tetrahedron known as Weyl chamber within which perfect entanglers form a polyhedron. We identify that all edges of the Wey…