Quantum phases of dipolar bosons in a multilayer optical lattice

Anno: 2022

Autori: Bandyopadhyay S., Sable H., Gaur D., Bai RKN., Mukerjee S., Angom D.

Affiliazione autori: Phys Res Lab, Ahmadabad 380009, Gujarat, India; Indian Inst Technol Gandhinagar, Gandhinagar 382355, Gujarat, India; Univ Trento, INO CNR BEC Ctr, Dept Phys, Via Sommar 14, I-38123 Trento, Italy; Univ Stuttgart, Inst Theoret Physics3, D-70550 Stuttgart, Germany; Univ Stuttgart, Ctr Integrated Quantum Sci & Technol, D-70550 Stuttgart, Germany; Indian Inst Sci, Dept Phys, Bangalore 560012, India; Manipur Univ, Dept Phys, Imphal 795003, Manipur, India.

Abstract: We consider a minimal model to investigate the quantum phases of hardcore, polarized dipolar atoms confined in multilayer optical lattices. The model is a variant of the extended Bose-Hubbard model, which incorporates intralayer repulsion and interlayer attraction between the atoms in nearest-neighbor sites. We study the phases of this model emerging from the competition between the attractive interlayer interaction and the interlayer hopping. Our results from the analytical and cluster-Gutzwiller mean-field theories reveal that multimer forma-tion occurs in the regime of weak intra-and interlayer hopping due to the attractive interaction. In addition, intralayer isotropic repulsive interaction results in the checkerboard ordering of the multimers. This leads to an incompressible checkerboard multimer phase at half-filling. At higher interlayer hopping, the multimers are destabilized to form resonating valence-bond-like states. Furthermore, we discuss the effects of thermal fluctuations on the quantum phases of the system.

Giornale/Rivista: PHYSICAL REVIEW A

Volume: 106 (4)      Da Pagina: 43301-1  A: 43301-17

Maggiori informazioni: The results presented in the paper are based on the computations using Vikram-100, the 100TFLOP HPC Cluster at Physical Research Laboratory, Ahmedabad, India. S.B acknowledges the support by Quantum Science and Technology in Trento (Q@TN), Provincia Autonoma di Trento, and the ERC Starting Grant StrEnQTh (Project -ID 804305) . SM acknowledges support from the DST, Govt. of India.
Parole chiavi: Ultracold Atoms; Superfluid; Insulator; Entanglement; Coherence; Field; Wave
DOI: 10.1103/PhysRevA.106.043301

Citazioni: 6
dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2025-06-29
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