Resonance-enhanced collective effect in a triangle arrangement of Rydberg atoms with anisotropic interactions

TL;DR

This paper explores how anisotropic dipole-dipole interactions in a triangular arrangement of Rydberg atoms lead to resonance-enhanced collective excitations, with implications for quantum control and many-body physics.

Contribution

It demonstrates the resonance-enhanced collective excitation effects in a triangular Rydberg atom setup with anisotropic interactions, including the effects of partial and strong blockade regimes.

Findings

Enhanced excitation probability in resonant areas

Correlation between blockade radius and triangle size

Agreement between theoretical models and observed excitation properties

Abstract

We investigate the collective excitation effect in a scheme where three identical Rydberg atoms are arranged in an equilateral triangular lattice. By using a static electric field polarizing the atomic dipoles, the dipole-dipole interactions between two Rydberg atoms are essentially anisotropic and can even disappear in the several special resonance cases. For that fact, we observe collectively enhanced excitation probability of single Rydberg atom in resonant areas in the case of strong blockade, and that of double or triple Rydberg atoms in the case of partial blockade. To give more evidences for this collective excitation enhancement, we study the two-body quantum correlation between three Rydberg atoms, as well as the dependence of the blockade radius on the length of triangle sides, which present a good agreement with the excitation properties.