Thermal-dephasing-tolerant generation of Schr\"{o}dinger cat states with Rydberg dressed blockade

TL;DR

This paper proposes a method to generate mesoscopic entangled states with Rydberg dressed atoms that is tolerant to thermal dephasing, significantly increasing coherence lifetime and fidelity for quantum computation and simulation.

Contribution

It introduces a novel approach of encoding logical states on dressed states to enhance entanglement lifetime and fidelity in Rydberg atom systems.

Findings

Coherence lifetime increased by approximately 3 times.

Solid fidelities achieved in mesoscopic superposition states.

Theoretical verification of advantages in large-scale quantum applications.

Abstract

Multipartite entangled states involving non-locality are one of the most fascinating characteristics of quantum mechanics. In this work, we propose a thermal-dephasing-tolerant generation of mesoscopic entangled states with Rydberg dressed atoms. We encode logical state on dressed states rather than Rydberg states. Such treatment can increase the lifetime of multipartite entanglement coherence to around 3 times compared to the Rydberg-state-coding one at the same system size, and therefore induce solid fidelities of mesoscopic superposition states generation. The current work theoretically verifies the advantages of using Rydberg dressed states in many-body quantum entanglement, which is helpful for large-scale quantum computation and many-body Rydberg quantum simulation.