Conditional quantum nonlocality in dimeric and trimeric arrays of organic molecules

TL;DR

This paper demonstrates that arrays of organic molecules, specifically perylene-based dimers and trimers, can be used as qubit systems for quantum control, entanglement, and nonlocality tests, with potential applications in quantum information processing.

Contribution

It introduces organic molecule arrays as viable platforms for quantum coherent control, entanglement, and nonlocality demonstrations, highlighting their long dephasing times and ability to perform quantum gates.

Findings

Successfully demonstrated quantum logic gates in molecular arrays.

Produced naturally entangled states with controllable entanglement.

Violated Bell-like inequalities in molecular trimer systems.

Abstract

Arrays of covalently bound organic molecules possess potential for light-harvesting and energy transfer applications due to the strong coherent dipole-dipole coupling between the transition dipole moments of the molecules involved. Here, we show that such molecular systems, based on perylene-molecules, can be considered as arrays of qubits that are amenable for laser-driven quantum coherent control. The perylene monomers exhibit dephasing times longer than four orders of magnitude a typical gating time, thus allowing for the execution of a large number of gate operations on the sub-picosecond timescale. Specifically, we demonstrate quantum logic gates and entanglement in bipartite (dimer) and tripartite (trimer) systems of perylene-based arrays. In dimers, naturally entangled states with a tailored degree of entanglement can be produced. The nonlocality of the molecular trimer entanglement is demonstrated by testing Mermin's (Bell-like) inequality violation.