Entanglement witness operator for quantum teleportation
The ability of entangled states to act as a resource for teleportation is linked to a property of
the fully entangled fraction. We show that the set of states with their fully entangled fraction …
the fully entangled fraction. We show that the set of states with their fully entangled fraction …
Detection of a mixed bipartite entangled state in arbitrary dimension via a structural physical approximation of partial transposition
A Kumari, S Adhikari - Physical Review A, 2019 - APS
It is crucial to know whether the quantum state generated in the experiment is entangled. In
the literature, this topic was studied extensively and researchers proposed different …
the literature, this topic was studied extensively and researchers proposed different …
Optimal quantum communication using multiparticle partially entangled states
A Kumar, S Adhikari, S Banerjee, S Roy - Physical Review A—Atomic …, 2013 - APS
We propose a three-qubit partially entangled set of states as a shared resource for optimal
and faithful quantum information processing. We show that our states always violate the …
and faithful quantum information processing. We show that our states always violate the …
Complete entanglement witness for quantum teleportation
MJ Zhao, SM Fei, X Li-Jost - Physical Review A—Atomic, Molecular, and …, 2012 - APS
We propose a set of linear quantum entanglement witnesses constituted by local quantum-
mechanical observables with each two possible measurement outcomes. These witnesses …
mechanical observables with each two possible measurement outcomes. These witnesses …
Witness operator provides better estimate of the lower bound of concurrence of bipartite bound entangled states in -dimensional system
S Aggarwal, S Adhikari - Quantum Information Processing, 2021 - Springer
It is known that the witness operator is useful in the detection and quantification of entangled
states. This motivated us for the construction of the family of witness operators that can …
states. This motivated us for the construction of the family of witness operators that can …
Generating and detecting bound entanglement in two-qutrits using a family of indecomposable positive maps
The problem of bound entanglement detection is a challenging aspect of quantum
information theory for higher dimensional systems. Here, we propose an indecomposable …
information theory for higher dimensional systems. Here, we propose an indecomposable …
Common entanglement witnesses and their characteristics
We investigate the issue of finding common entanglement witness for certain class of states
and extend this study to the case of Schmidt number witnesses. We also introduce the notion …
and extend this study to the case of Schmidt number witnesses. We also introduce the notion …
Construction of optimal teleportation witness operators from entanglement witnesses
Teleportation witnesses are Hermitian operators which can identify useful entanglement for
quantum teleportation. Here we provide a systematic method to construct teleportation …
quantum teleportation. Here we provide a systematic method to construct teleportation …
Detection and Classification of Bipartite and Multipartite Entangled States
A Kumari - arXiv preprint arXiv:2305.16643, 2023 - arxiv.org
The detection and classification of entanglement properties in a two-qubit and a multi-qubit
system is a topic of great interest. This topic has been extensively studied, and as a result …
system is a topic of great interest. This topic has been extensively studied, and as a result …
Estimation of entanglement negativity of a two-qubit quantum system with two measurements
S Adhikari - Europhysics Letters, 2018 - iopscience.iop.org
Numerous work had been done to quantify the entanglement of a two-qubit quantum state,
but it can be seen that previous works were based on joint measurements on two copies or …
but it can be seen that previous works were based on joint measurements on two copies or …