Quantum phase transitions of a two-leg bosonic ladder in an artificial gauge field

Roberta Citro 1 S. de Palo 2, 3 M. Di Dio 3 E. Orignac 4
1 Dipartamento di Fisica "E. R. Caianiello"
2 Dipartimento di Fisica Teorica
3 CNR-IOM-Democritos
4 Laboratoire de Physique de l’Ecole Normale Supérieure de Lyon (Lyon, France)
Abstract : We consider a two leg bosonic ladder in a U(1) gauge field with both interleg hopping and interleg repulsion. As a function of the flux, the interleg interaction converts the commensurate-incommensurate transition from the Meissner to a Vortex phase, into an Ising-type of transition towards a density wave phase. A disorder point is also found after which the correlation functions develop a damped sinusoid behavior signaling a melting of the vortex phase. We discuss the differences on the phase diagram for attractive and repulsive interleg interaction. In particular, we show how repulsion favors the Meissner phase at low flux and a phase with a second incommensuration in the correlation functions for intermediate flux, leading to a richer phase diagram than in the case of interleg attraction. The effect of the temperature on the chiral current is also discussed.
Keywords : Artificial gauge fields Commensurate incommensurate transition Disorder point Ising transition Ultracold Bosons
Document type :
Journal articles
Complete list of metadatas

Cited literature [109 references]  Display  Hide  Download
https://hal-ens-lyon.archives-ouvertes.fr/ensl-01813546
Contributor : Edmond Orignac <>
Submitted on : Tuesday, June 12, 2018 - 2:30:45 PM
Last modification on : Wednesday, November 20, 2019 - 8:02:37 AM
Long-term archiving on : Friday, September 14, 2018 - 12:55:02 AM

File

hal.pdf
Files produced by the author(s)

Identifiers

Collections

ENS-LYON

Citation

Roberta Citro, S. de Palo, M. Di Dio, E. Orignac. Quantum phase transitions of a two-leg bosonic ladder in an artificial gauge field. Physical Review B : Condensed matter and materials physics, American Physical Society, 2018, 97 (17), pp.174523. ⟨10.1103/PhysRevB.97.174523⟩. ⟨ensl-01813546⟩

Export

BibTeX TEI DC DCterms EndNote

Share

Metrics

Record views

53

Files downloads

110

Contact

CCSD