33 citations · 144 across the 23 of their papers we have counts for
23 papers
Comment on "Contextuality and quantum discord"
Chellasamy Jebarathinam
In a paper, Al-Qasimi [Physics Letters A 449 (2022) 128347] proposed a criterion for contextuality of two-qubit systems extending Peres' proof of contextuality [Phys. Lett. A 151 (…
Operational Coherent Measurements with Steering and Randomness
Chellasamy Jebarathinam, Huan-Yu Ku, Hsi-Sheng Goan
Measurement incompatibility underpins randomness generation in nonlocal phenomena. However, at its root, a more fundamental quantum feature is noncommuting (or coherent) measuremen…
Popescu-Rohrlich box fraction of nonobjective information and distinguishing quantum theory
Chellasamy Jebarathinam
It is demonstrated that identifying information-theoretic limitations of quantum Bell nonlocality alone cannot completely distinguish quantum theory from generalized nonsignaling t…
Secure key distribution based on Popescu-Rohrlich box fraction of dimensionally restricted nonlocality
Chellasamy Jebarathinam
For the bipartite Bell scenario with two inputs and two outputs, a nonlinear witness of dimensionally restricted nonlocality is introduced. Popescu-Rohrlich (PR) box fraction of di…
Global Coherence in Quantum Discord as a Resource
Chellasamy Jebarathinam, Huan-Yu Ku, Hao-Chung Cheng +1
This work addresses which aspect of \textit{bipartite coherence} in \textit{quantum discord} is essential for \textit{genuinely quantum correlation}. To this end, \textit{global co…
Operational simultaneous correlations in complementary bases of bipartite states via one-sided semi-device-independent steering
Chellasamy Jebarathinam, Debarshi Das, Huan-Yu Ku +2
Recently, a different form of quantum steering, i.e., certification of quantum steering in a one-sided semi-device-independent way, has been formulated [Jebarathinam \etal Phys. Re…
Certification of multi-qubit quantum systems with temporal inequalities
Gautam Sharma, Chellasamy Jebarathinam, Sk Sazim +1
Demonstrating contextual correlations in quantum theory through the violation of a non-contextuality inequality necessarily needs some ``contexts" and thus assumes some compatibili…
Contextuality, superlocality and nonclassicality of supernoncontextuality
Chellasamy Jebarathinam, R. Srikanth
Contextuality is a fundamental manifestation of nonclassicality, indicating that for certain quantum correlations, sets of jointly measurable variables cannot be pre-assigned value…
Asymmetric One-Sided Semi-Device-Independent Steerability of Quantum Discordant States
Chellasamy Jebarathinam, Debarshi Das, R. Srikanth
Superlocality and superunsteerability provide operational characterization of quantum correlations in certain local and unsteerable states respectively. Such quantum correlated sta…
Certification of two-qubit quantum systems with temporal inequality
Chellasamy Jebarathinam, Gautam Sharma, Sk Sazim +1
Self-testing of quantum devices based on observed measurement statistics is a method to certify quantum systems using minimal resources. In Ref. [Phys. Rev. \textbf{A} 101, 032106…
Quantum correlations on the no-signaling boundary: self-testing and more
Kai-Siang Chen, Gelo Noel M. Tabia, Chellasamy Jebarathinam +3
In device-independent quantum information, correlations between local measurement outcomes observed by spatially separated parties in a Bell test play a fundamental role. Even thou…
Scalable noncontextuality inequalities and certification of multiqubit quantum systems
Rafael Santos, Chellasamy Jebarathinam, Remigiusz Augusiak
We propose a family of noncontextuality inequalities and show that they can be used for certification of multiqubit quantum systems. Our scheme, unlike those based on non-locality,…
Device-independent certification of maximal randomness from pure entangled two-qutrit states using non-projective measurements
Jakub Jan Borkała, Chellasamy Jebarathinam, Shubhayan Sarkar +1
While it has recently been demonstrated how to certify the maximal amount of randomness from any pure two-qubit entangled state in a device-independent way [E. Woodhead et al., Phy…
Self-testing of any pure entangled state with minimal number of measurements and optimal randomness certification in one-sided device-independent scenario
Shubhayan Sarkar, Jakub J. Borkała, Chellasamy Jebarathinam +3
Certification of quantum systems and their properties has become a field of intensive studies. Here, taking advantage of the one-sided device-independent scenario (known also as qu…
Self-testing of binary Pauli measurements requiring neither entanglement nor any dimensional restriction
Ananda G. Maity, Shiladitya Mal, Chellasamy Jebarathinam +1
Characterization of quantum devices received from unknown providers is a significant primary task for any quantum information processing protocol. Self-testing protocols are design…
Certifying quantumness beyond steering and nonlocality and its implications on quantum information processing
Chellasamy Jebarathinam, Debarshi Das
Superunsteerability is a particular kind of spatial quantum correlation that can be observed in a steering scenario in the presence of limited shared randomness. In this work, we d…
"All-versus-nothing" proof of genuine tripartite steering and entanglement certification in the two-sided device-independent scenario
Shashank Gupta, Debarshi Das, C. Jebarathinam +3
We consider the task of certification of genuine entanglement of tripartite states. For this purpose, we first present an "all-versus-nothing" proof of genuine tripartite Einstein-…
Pearson Correlation Coefficient as a measure for Certifying and Quantifying High Dimensional Entanglement
C. Jebarathinam, Dipankar Home, Urbasi Sinha
A scheme for characterizing entanglement using the statistical measure of correlation given by the Pearson correlation coefficient (PCC) was recently suggested that has remained un…
Maximal Violation of a Broad Class of Bell Inequalities and Its Implications on Self-Testing
C. Jebarathinam, Jui-Chen Hung, Shin-Liang Chen +1
In quantum information, lifting is a systematic procedure that can be used to derive---when provided with a seed Bell inequality---other Bell inequalities applicable in more compli…
Remote State Preparation using Correlations beyond Discord
Som Kanjilal, Aiman Khan, C. Jebarathinam +1
In recent years, exploring the possible use of separable states as resource for achieving quantum information processing(QIP) tasks has been gaining increasing significance. In thi…
Revealing the quantitative relation between simultaneous correlations in complementary bases and quantum steering for two-qubit Bell diagonal states
C. Jebarathinam, Aiman Khan, Som Kanjilal +1
The present work is motivated by the question as to what aspect of correlation entailed by the two-qubit state serves as the appropriate quantitative resource for steering. To this…
On total correlations in a bipartite quantum joint probability distribution
C. Jebarathinam
We discuss the problem of separating the total correlations in a given quantum joint probability distribution into nonlocality, contextuality and classical correlations. Bell disco…
Canonical decomposition of quantum correlations in the framework of generalized nonsignaling theories
C. Jebarathinam
We introduce the measures, Bell discord (BD) and Mermin discord (MD), to characterize bipartite quantum correlations in the context of nonsignaling (NS) polytopes. These measures d…