Separability for mixed states with operator Schmidt rank two.

Gemma De las Cuevas, Tom Drescher and Tim Netzer. Quantum 3, 203 (2019). arXiv:1903.05373

Quantum magic squares: dilations and their limitations.

Gemma De las Cuevas, Tom Drescher and Tim Netzer. J. Math. Phys. 61, 111704 (2020). (Editor's pick). arXiv:1912.07332