# Deterministic entanglement generation between a pair of atoms on different Rydberg states via chirped adiabatic passage

## TL;DR

This paper proposes a method for reliably creating entangled states between two atoms in different Rydberg states using chirped adiabatic passage, avoiding the blockade effect and optimizing parameters for high fidelity.

## Contribution

It introduces a novel scheme for deterministic entanglement generation between atoms on different Rydberg states without relying on the blockade effect.

## Key findings

- High fidelity entanglement achievable with proper pulse parameters
- Analytic and numerical results show strong agreement
- Optimal conditions identified for experimental implementation

## Abstract

We develop a scheme for deterministic generation of an entangled state between two atoms on different Rydberg states via a chirped adiabatic passage, which directly connects the initial ground and target entangled states and also does not request the normally needed blockade effect. The occupancy of intermediate states suffers from a strong reduction via two pulses with proper time-dependent detunings and the electromagnetically induced transparency condition. By solving the analytical expressions of eigenvalues and eigenstates of a two-atom system, we investigate the optimal parameters for guaranteeing the adiabatic condition. We present a detailed study for the effect of pulse duration, changing rate, different Rydberg interactions on the fidelity of the prepared entangled state with experimentally feasible parameters, which reveals a good agreement between the analytic and full numerical results.