تقرير
Entanglement phase transition due to reciprocity breaking without measurement or post-selection
| العنوان: | Entanglement phase transition due to reciprocity breaking without measurement or post-selection |
|---|---|
| المؤلفون: | Lee, Gideon, Jin, Tony, Wang, Yu-Xin, McDonald, Alexander, Clerk, Aashish |
| المصدر: | PRX Quantum 5, 010313 (2024) |
| سنة النشر: | 2023 |
| المجموعة: | Condensed Matter Quantum Physics |
| مصطلحات موضوعية: | Quantum Physics, Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Statistical Mechanics |
| الوصف: | Despite its fully unitary dynamics, the bosonic Kitaev chain (BKC) displays key hallmarks of non-Hermitian physics including non-reciprocal transport and the non-Hermitian skin effect. Here we demonstrate another remarkable phenomena: the existence of an entanglement phase transition (EPT) in a variant of the BKC that occurs as a function of a Hamiltonian parameter g, and which coincides with a transition from a reciprocal to a non-reciprocal phase. As g is reduced below a critical value, the post-quench entanglement entropy of a subsystem of size l goes from a volume-law phase where it scales as l to a super-volume law phase where it scales like lN with N the total system size. This EPT occurs for a system undergoing purely unitary evolution and does not involve measurements, post-selection, disorder or dissipation. We derive analytically the entanglement entropy out of and at the critical point for the $l=1$ and $l/N \ll 1$ case. |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PRXQuantum.5.010313 |
| URL الوصول: | http://arxiv.org/abs/2308.14614 |
| رقم الأكسشن: | edsarx.2308.14614 |
| قاعدة البيانات: | arXiv |
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