Year: 2023
Type: article
Abstract: We propose a mechanism for liquid formation in strongly correlated lattice systems. The mechanism is based on an interplay between long-range attraction and superexchange processes. As an example, we study dipolar bosons in one-dimensional optical lattices. We present a perturbative theory and validate it in comparison with full density-matrix renormalization group simulations for the energetic and structural properties of different phases of the system, i.e., self-bound Mott insulator, liquid, and gas. We analyze the nonequilibrium properties and calculate the dynamic structure factor. Its structure differs in compressible and insulating phases. In particular, the low-energy excitations in compressible phases are linear phonons. We extract the speed of sound and analyze its dependence on dipolar interaction and density. We show that it exhibits a nontrivial behavior owing to the breaking of Galilean invariance. We argue that an experimental detection of this previously unknown quantum liquid could provide a fingerprint of the superexchange process and open intriguing possibilities for investigating non-Galilean invariant liquids.
Source: Physical Review Letters
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,750
Awards: G1175115578, G1636189437, G1768993395, G1979755954, G2064873908, G2145771558, G2262748287, G2298356473, G2601397997, G29591043, G3005324705, G300979063, G3275705967, G3480869486, G363947740, G3681454997, G3746636746, G3775377788, G4042783231, G410571670, G4179535065, G425668148, G451917667, G4710139657, G5080475149, G5160127039, G5195188938, G5199606742, G5539308778, G5842359595, G5967599077, G6292057946, G645816665, G7084143925, G7736885172, EXC 2111: Munich Center for Quantum Science and Technology (MCQST), G948124368
OpenAlex ID: W4315705151