A binary mixture of Bose-Einstein-condensates in a double-well potential: Berry phase and two-mode entanglement

Autor:	Günay, Mehmet
Rok vydání:	2019
Předmět:	Condensed Matter - Quantum Gases Physics - Atomic and Molecular Clusters Physics - Atomic Physics Physics - Optics Quantum Physics
Zdroj:	Phys. Rev. A 101, 043608 (2020)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevA.101.043608
Popis:	A binary mixtures of Bose-Einstein condensate structures exhibit an incredible richness in terms of holding different kinds of phases. Depending on the ratio of the inter- and intra-atomic interactions, the transition from mixed to separated phase, which is also known as the miscibility-immiscibility transition, has been reported in different setups and by different groups. Here, we describe such type of quantum phase transition in an effective Hamiltonian approach, by applying Holstein-Primakoff transformation in the limit of large number of particles. We demonstrate that non-trivial geometric phase near the critical coupling is present, which confirms the connection between Berry phase and quantum phase transition. We also show that, by using the spin form of Hillery & Zubairy criterion, a two mode entanglement accompanies this transition in the limit of large, but not infinite number of particles. Comment: 7 pages, 3 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1910.14433 Zobrazit plný text záznamu View this record from Arxiv