No Universal Purification in Quantum Mechanics

@article{liuNoUniversalPurification2025,
 archiveprefix = {arXiv},
 author = {Liu, Zhenhuan and Du, Zhenyu and Cai, Zhenyu and Liu, Zi-Wen},
 doi = {10.48550/arXiv.2509.21111},
 eprint = {2509.21111},
 journal = {arXiv},
 month = {September},
 number = {arXiv:2509.21111},
 primaryclass = {quant-ph},
 publisher = {arXiv},
 title = {No Universal Purification in Quantum Mechanics},
 url = {http://arxiv.org/abs/2509.21111},
 year = {2025}
}