Quantum dynamics of a binary mixture of BECs in a double well potential: an Holstein-Primakoff approach
作者： Roberta Citro , Adele Naddeo , Edmond Orignac
DOI: 10.1088/0953-4075/44/11/115306
关键词: Physics 、 Double-well potential 、 Quantum dynamics 、 Spin states 、 Semiclassical physics 、 Quantum evolution 、 Quantum mechanics 、 Boson 、 Hamiltonian (quantum mechanics) 、 Quantum tunnelling
摘要: We study the quantum dynamics of a binary mixture Bose-Einstein condensates (BEC) in double-well potential starting from two-mode Bose-Hubbard Hamiltonian. Focussing on regime where number atoms is very large, mapping onto SU(2) spin problem together with Holstein-Primakoff transformation performed. The evolution difference bosons between two wells investigated for different initial conditions, which range case small imbalance to coherent state. results show an instability towards phase-separation above critical positive value interspecies interaction while system evolves tunneling negative interactions. A comparison semiclassical approach discussed some implications experimental realization phase separation cold atoms.
arxiv.org
128.84.21.199参考文章(51)
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