Single-excitation correlation dynamics of polar molecules on 1D lattices: driving by external electric fields

Abstract

Abstract We study a LiCs strongly-interacting 1D molecular lattice system in the Mott insulator regime, allowing one molecule per site prepared in the lowest electronic and vibrational state in presence of a perpendicular electric field. At large intermolecular distance and low filling, the dipole-dipole interaction in the nearest-neighbor approximation governs the dynamics exchange of the two allowed rotational levels, we analyze it for several field strengths. The generated von Neumann entanglement entropy and its monotonically growth in short-term evolutions is shown. The potential of these molecular systems to be used in quantum information protocols is enhanced by the early emergence of a long-range order in the single-particle density matrix correlator throughout the lattice as here we present. Contrary of the widely used two-level approach, our results clearly show that the full four set of internal rotational projections must be taken into account. The numerical simulations are performed by means of the Time-Evolving Block Decimation algorithm based on the Matrix Product State formalism and the Susuki-Trotter decomposition.