Deterministic generation of arbitrary photonic states assisted by dissipation

TL;DR

This paper proposes a method to generate complex photonic states by leveraging atom-like emitters and dissipation in nanophotonic waveguides, enabling high-fidelity state mapping for quantum information applications.

Contribution

It introduces a novel protocol using decoherence-free subspaces and controlled dissipation to generate and map entangled states between atoms and photons.

Findings

Utilizes decoherence-free subspaces for robust atomic state control.

Achieves high-fidelity mapping of atomic entanglement to photonic states.

Discusses practical implementation with ultracold atoms and photonic crystal waveguides.

Abstract

A scheme to utilize atom-like emitters coupled to nanophotonic waveguides is proposed for the generation of many-body entangled states and for the reversible mapping of these states of matter to photonic states of an optical pulse in the waveguide. Our protocol makes use of decoherence-free subspaces (DFS) for the atomic emitters with coherent evolution within the DFS enforced by strong dissipative coupling to the waveguide. By switching from subradiant to superradiant states, entangled atomic states are mapped to photonic states with high fidelity. An implementation using ultracold atoms coupled to a photonic crystal waveguide is discussed.