Periodically-driven facilitated high-efficiency dissipative entanglement with Rydberg atoms

TL;DR

This paper presents a scheme using periodic driving fields to rapidly generate high-fidelity dissipative entanglement between Rydberg atoms, achieving near-perfect entanglement in under 400 microseconds with robustness to initial states.

Contribution

It introduces a novel method leveraging external periodic modulation to accelerate and enhance dissipative entanglement formation in Rydberg atom systems.

Findings

Achieves steady entanglement fidelity of ~0.98

Reduces entanglement formation time to less than 400 microseconds

Demonstrates robustness against initial population distributions

Abstract

A time-dependent periodical field can be utilized to efficiently modify the Rabi coupling of system, exhibiting nontrivial dynamics. We propose a scheme to show that this feature can be applied for speeding up the formation of dissipative steady entanglement based on Rydberg anti-blockade mechanism in a simplified configuration, fundamentally stemming from a frequency match between the external-field modulation frequency and the systematic characteristic frequency. In the presence of an optimal modulation frequency that is exactly equal to the central frequency of driving field, it enables a sufficient residence time of the two-excitation Rydberg state for an irreversible spontaneous decay onto the target state, leading to an accelerated high-fidelity steady entanglement ~0.98, with a shorter formation time <400\mu s. We show that, a global maximal fidelity benefits from a consistence of microwave-field coupling and spontaneous decay strengths, by which the scheme promises a robust insensitivity to the initial population distributions. This simple approach to facilitate the generation of dissipative entangled two-qubit states by using periodic drivings may guide a new experimental direction in Rydberg quantum technology and quantum information.