An atomtronic flux qubit: a ring lattice of Bose-Einstein condensates interrupted by three weak links

被引：31

作者：

Aghamalyan, D. ^{[1
,2
,3
]}

Nguyen, N. T. ^{[3
]}

Auksztol, F. ^{[3
]}

Gan, K. S. ^{[3
]}

Valado, M. Martinez ^{[3
]}

Condylis, P. C. ^{[3
]}

Kwek, L-C ^{[3
,4
,5
]}

Dumke, R. ^{[3
]}

Amico, L. ^{[3
,6
,7
,8
]}

机构：

[1] CNRS, UMR 6251, Inst Phys Rennes, F-35042 Rennes, France

[2] Univ Rennes 1, F-35042 Rennes, France

[3] Natl Univ Singapore, Ctr Quantum Technol, Singapore 117543, Singapore

[4] Nanyang Technol Univ, Natl Inst Educ, 1 Nanyang Walk, Singapore 637616, Singapore

[5] Nanyang Technol Univ, Inst Adv Studies, 1 Nanyang Walk, Singapore 637616, Singapore

[6] CNR, MATIS, IMM, Via S Sofia 64, I-95127 Catania, Italy

[7] Dipartimento Fis & Astron, Via S Sofia 64, I-95127 Catania, Italy

[8] INFN, Lab Nazl Sud, Via S Sofia 62, I-95123 Catania, Italy

来源：

NEW JOURNAL OF PHYSICS | 2016年 / 18卷

基金：

新加坡国家研究基金会;

关键词：

atomtronics quantum interference device; flux qubit; ring condensate; atom circuits; NEUTRAL ATOMS; ONE-DIMENSION; SYSTEMS; MODELS; BOSONS;

D O I：

10.1088/1367-2630/18/7/075013

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study a physical system consisting of a Bose-Einstein condensate confined to a ring shaped lattice potential interrupted by three weak links. The system is assumed to be driven by an effective flux piercing the ring lattice. By employing path integral techniques, we explore the effective quantum dynamics of the system in a pure quantum phase dynamics regime. Moreover, the effects of the density's quantum fluctuations are studied through exact diagonalization analysis of the spectroscopy of the Bose-Hubbard model. We demonstrate that a clear two-level system emerges by tuning the magnetic flux at degeneracy. The lattice confinement, platform for the condensate, is realized experimentally employing a spatial light modulator.

引用

页数：12

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