Partial Transpose Moments, Principal Minors and Entanglement Detection

Abstract

Recently, it has been shown that locally randomized measurements can be employed to get partial transpose moments of a density matrix [Elben A., {\it et al.} Phys. Rev. Lett. {\bf 125}, 200501 (2020)]. Consequently, two general entanglement detection methods were proposed based on partial transpose moments of a density matrix [Yu X-D., {\it et al.} Phys. Rev. Lett. {\bf 127}, 060504 (2021)]. In this context, a natural question arises that how partial transpose moments are related with entanglement and with well known idea of principal minors. In this work, we analytically demonstrate that for qubit-qubit quantum systems, partial transpose moments can be expressed as simple functions of principal minors. We expect this relation to exist for every bipartite quantum systems. In addition, we have extended the idea of PT-moments for tripartite qubit systems and have shown that PT-moments can only detect the whole range of being NPT for $GHZ$ and $W$ states mixed with white noise.

15 pages, no figures

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• Entanglement detection
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Cited by in corpus (5)

• Genuine entanglement under squeezed generalized amplitude damping channels with memory
• A unifying separability criterion based on extended correlation tensor
• Detection of entanglement via moments of positive maps
• Detecting entanglement from few partial transpose moments and their decay via weight enumerators
• Sudden change of genuine multipartite entanglement in non-Markovian dynamics