Spontaneous Peierls dimerization and emergent bond order in one-dimensional dipolar gases

Year: 2014

Authors: Di Dio M., Barbiero L., Recati A., Dalmonte M.

Autors Affiliation: IOM-CNR Democritos, SISSA Via Bonomea 265, I-34136 Trieste, Italy; Laboratoire de Physique Théorique, CNRS, UMR 5152 and Université de Toulouse, UPS, F-31062 Toulouse, France; Dipartimento di Fisica e Astronomia “Galileo Galilei,” Università di Padova, I-35131 Padova, Italy, INO-CNR BEC Center, via Sommarive, 14, I-38121 Povo, Trento, Italy; Institute for Quantum Optics and Quantum Information and Institute for Theoretical Physics, Technikerstraße 21a, A-6020 Innsbruck, Austria

Abstract: We investigate the effect of dipolar interactions in one-dimensional systems in connection with the possibility of observing exotic many-body effects with trapped atomic and molecular dipolar gases. By combining analytical and numerical methods, we show how the competition between short-and long-range interactions gives rise to frustrating effects which lead to the stabilization of spontaneously dimerized phases characterized by a bond ordering. This genuine quantum order is sharply distinguished from Mott and spin-density-wave phases, and can be unambiguously probed by measuring nonlocal order parameters via in situ imaging techniques.

Journal/Review: PHYSICAL REVIEW A

Volume: 90 (6)      Pages from: 63608-1  to: 63608-7

More Information: We thank S. Bhongale, E. Ercolessi, L. Mathey, A. Montorsi, G. Pupillo, and M. Roncaglia for fruitful discussions, and F. Ortolani for help with the DMRG code. This work is supported by AQUTE, the Austrian Science Fund FWF (SFB FOQUS F4015-N16), ERC (QGBE), ERC (UQUAM) grant, Provincia Autonoma di Trento, Cariparo Foundation (Eccellenza Grant No. 11/12), and ANR 2010 BLANC0406-0. L.B. is grateful to HPC resources of CALMIP (Toulouse) and CNR-INO BEC Center (Trento) for CPU time.
KeyWords: Extended Hubbard-model; Optical Lattice; Quantum Simulation; Polar-molecules; Ultracold Gases; Magnetism; Chains; Atoms; Pairs
DOI: 10.1103/PhysRevA.90.063608

Citations: 10
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