Entanglement and spin squeezing in non-Hermitian phase transitions
Quantum Gases
2014-12-19 v2 Quantum Physics
Abstract
We show that non-Hermitian dynamics generate substantial entanglement in many-body systems. We consider the non-Hermitian Lipkin-Meshkov-Glick model and show that its phase transition occurs with maximum multiparticle entanglement: there is full N-particle entanglement at the transition, in contrast to the Hermitian case. The non-Hermitian model also exhibits more spin squeezing than the Hermitian model, showing that non-Hermitian dynamics are useful for quantum metrology. Experimental implementations with trapped ions and cavity QED are discussed.
Cite
@article{arxiv.1409.7067,
title = {Entanglement and spin squeezing in non-Hermitian phase transitions},
author = {Tony E. Lee and Florentin Reiter and Nimrod Moiseyev},
journal= {arXiv preprint arXiv:1409.7067},
year = {2014}
}
Comments
5 pages + appendix