تقرير
No-Go Theorems for Universal Entanglement Purification
| العنوان: | No-Go Theorems for Universal Entanglement Purification |
|---|---|
| المؤلفون: | Zang, Allen, Chen, Xinan, Chitambar, Eric, Suchara, Martin, Zhong, Tian |
| سنة النشر: | 2024 |
| المجموعة: | Quantum Physics |
| مصطلحات موضوعية: | Quantum Physics |
| الوصف: | An entanglement purification protocol (EPP) aims to transform multiple noisy entangled states into a single entangled state with higher fidelity. In this work we consider EPPs that always yield an output fidelity no worse than each of the original noisy states, a property we call universality. We prove there is no $n$-to-1 EPP implementable by local operations and classical communication that is universal for all two-qubit entangled states, whereas such an EPP is possible using more general positive partial transpose-preserving (PPT) operations. We also show that universality is not possible by bilocal Clifford EPPs even when restricted to states with fidelities above an arbitrarily high threshold. Comment: 5+20 pages, 2+1 figures |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2407.21760 |
| رقم الأكسشن: | edsarx.2407.21760 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |