Incommensurate phases of a bosonic two-leg ladder under a flux

被引：42

作者：

Orignac, E. ^{[1
]}

Citro, R. ^{[2
,3
]}

Di Dio, M. ^{[4
]}

De Palo, S. ^{[4
,5
]}

Chiofalo, M-L ^{[6
,7
]}

机构：

[1] Univ Lyon 1, Ens Lyon, CNRS, Phys Lab, F-69342 Lyon, France

[2] Univ Salerno, Dipartimento Fis ER Caianiello, Via Giovanni Paolo 2, I-84084 Fisciano, SA, Italy

[3] Univ Salerno, Spin CNR, Via Giovanni Paolo 2, I-84084 Fisciano, SA, Italy

[4] CNR IOM Democritos Natl Simulat Ctr, UDS Via Bonomea 265, I-34136 Trieste, Italy

[5] Univ Trieste, Dipartimento Fis Teor, I-34014 Trieste, Italy

[6] Univ Pisa, Dept Phys Enrico Fermi, Largo Bruno Pontecorvo 3, I-56127 Pisa, Italy

[7] Univ Pisa, Ist Nazl Fis Nucl, Largo Bruno Pontecorvo 3, I-56127 Pisa, Italy

来源：

NEW JOURNAL OF PHYSICS | 2016年 / 18卷

关键词：

gauge fields; Meissner to vortex transition; incommensurations; ANISOTROPIC SUPEREXCHANGE INTERACTION; SINE-GORDON MODEL; DENSITY-MATRIX; MAGNETIC EXCITATION; QUANTUM VORTICES; GROUND-STATE; TRANSITIONS; SPECTRUM; CHAINS; DIAGRAM;

D O I：

10.1088/1367-2630/18/5/055017

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A boson two-leg ladder in the presence of a synthetic magnetic flux is investigated by means of bosonization techniques and density matrix renormalization group (DMRG). We follow the quantum phase transition from the commensurate Meissner to the incommensurate vortex phase with increasing flux at different fillings. When the applied flux is rho pi and close to it, where. is the filling per rung, we find a second incommensuration in the vortex state that affects physical observables such as the momentum distribution, the rung-rung correlation function and the spin-spin and charge-charge static structure factors.

引用

页数：18

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