7 papers
Entanglement Distillation of some Rank-Five Symmetric NPT States in Two-Qutrit Systems
Yuwei Lei, Zihua Song, Lin Chen +1
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…
A partial-trace matrix inequality and Werner-state distillability
Zhiwei Song, Lin Chen
Motivated by the equivalent partial-trace formulations of Werner-state distillability [P. Costa Rico, Lett. Math. Phys. 115, 47 (2025); S.-Y. Qi et al., Phys. Rev. A 110, 012406 (2…
Construction of three-qubit positive-partial-transpose entangled states of rank four
Yonggang Cheng, Lin Chen
Multiqubit positive-partial-transpose (PPT) entangled states play an important role in quantum information theory. We characterize such states of minimum rank in three-qubit system…
On the saturated cases of the distillability conjecture
Saiqi Liu, Lin Chen
The distillability conjecture for two-copy four-by-four Werner states has been an open problem in quantum information for years. We investigate the conditions under which the conje…
High-Dimensional Carrier-Assisted Entanglement Purification Based on Mutually Unbiased Bases
Zihua Song, Lin Chen, Yongge Wang
Distilling high-dimensional quantum entanglement under realistic, general asymmetric noise remains a formidable challenge. Standard entanglement purification protocols inevitably f…
A counterexample to the strong spin alignment conjecture
Zhiwei Song, Lin Chen
The spin alignment conjecture was originally formulated in connection with the additivity of coherent information for a class of quantum channels known as platypus channels. Recent…