Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

arXiv:1910.05511 · Pramana

Broadcasting of NPT entanglement in two qutrit systems

Rounak Mundra, Sabuj Chattopadhyay, Indranil Chakrabarty, Nirman Ganguly

Published Apr 8, 2021• 0 citations
arXivHTMLPDF
DOI
10.1007/s12043-021-02098-w

Related papers

Entanglement analysis of hybrid qubit-qutrit and qutrit-qutrit systems interacting with two different noises

Georges Collince Fouokeng, Martin Tchoffo

Next research.•Jul 24, 2026•0 citations

Entanglement of two-qutrit system

Guo‐Qiang Zhu, Xuean Zhao, You‐Quan Li

The European Physical Journal B•Apr 1, 2005•2 citations

Entanglement Distillation of some Rank-Five Symmetric NPT States in Two-Qutrit Systems

Yuwei Lei, Zihua Song, Lin Chen +1 more

Entanglement distillation is a fundamental task in quantum information processing. In this work, we investigate the distillability properties of a class of two-qutrit symmetric NPT states of rank five. We resolve the 1-distillability problem for this class by proving that the previously open interval of the eigenvalue parameter is 1-undistillable. For the 2-distillability, we uncover a structural obstruction showing that no Schmidt-rank-two vector has a negative expectation in the relevant subspace. We also perform numerical investigations to explore the 2-distillability beyond this obstruction.

quant-pharXiv:2608.03710•Aug 5, 2026•0 citations

Inertia of two-qutrit entanglement witnesses

Changchun Feng, Lin Chen, Chang Liang Xu +1 more

Entanglement witnesses (EWs) are a fundamental tool for the detection of entanglement. We investigate the inertia of bipartite EWs constructed by the partial transpose of NPT states. Furthermore, we find out most of the inertia of the partial transpose of the two-qutrit bipartite NPT states. As an application, we extend our results to high-dimensional states.

arXiv:2204.09252•Linear and Multilinear Algebra•Dec 25, 2022•5 citations

Thermal entanglement in two qutrits system

G.-F. Zhang, J.-Q. Liang, G.-E. Zhang +1 more

The European Physical Journal D•Jan 4, 2005•26 citations

Detection of a mixed bipartite entangled state in arbitrary dimension via a structural physical approximation of partial transposition

Anu Kumari, Satyabrata Adhikari

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 approaches for the detection of a mixed bipartite entangled state in arbitrary dimension. Proceeding in this line of research, we propose three different criteria for the detection of mixed bipartite negative partial transpose (NPT) entangled state in arbitrary dimension. Our criteria are based on the method of structural physical approximation (SPA) of partial transposition (PT). We show that the proposed criteria for the detection of a NPT entangled state can be realized experimentally. Two of the proposed criteria are given in terms of the concurrence of the given state in arbitrary dimension so it is essential to find out the concurrence. Thus, we provide lower and upper bounds of concurrence of the quantum state under investigation in terms of average fidelity of two quantum states, and hence these bounds can be realized experimentally. Moreover, we show how to perform a SPA map on a qutrit-qubit system and then explicitly calculate the matrix elements of the density matrix describing the SPA-PT of the qutrit-qubit system. We then illustrate our criteria for the detection of entanglement by considering a class of qubit-qubit system and a class of qutrit-qubit system.

arXiv:1910.08279•Physical Review A•Nov 18, 2019•7 citations
Entanglement distillation is a fundamental task in quantum information processing. In this work, we investigate the distillability properties of a class of two-qutrit symmetric NPT states of rank five. We resolve the 1-distillability problem for this class by proving that the previously open interval of the eigenvalue parameter is 1-undistillable. For the 2-distillability, we uncover a structural obstruction showing that no Schmidt-rank-two vector has a negative expectation in the relevant subspace. We also perform numerical investigations to explore the 2-distillability beyond this obstruction.
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 approaches for the detection of a mixed bipartite entangled state in arbitrary dimension. Proceeding in this line of research, we propose three different criteria for the detection of mixed bipartite negative partial transpose (NPT) entangled state in arbitrary dimension. Our criteria are based on the method of structural physical approximation (SPA) of partial transposition (PT). We show that the proposed criteria for the detection of a NPT entangled state can be realized experimentally. Two of the proposed criteria are given in terms of the concurrence of the given state in arbitrary dimension so it is essential to find out the concurrence. Thus, we provide lower and upper bounds of concurrence of the quantum state under investigation in terms of average fidelity of two quantum states, and hence these bounds can be realized experimentally. Moreover, we show how to perform a SPA map on a qutrit-qubit system and then explicitly calculate the matrix elements of the density matrix describing the SPA-PT of the qutrit-qubit system. We then illustrate our criteria for the detection of entanglement by considering a class of qubit-qubit system and a class of qutrit-qubit system.