Protection of entanglement for a two-qutrit V-type open system on the basis of system-reservoir bound states

TL;DR

This paper investigates how bound states in the energy spectrum can be used to protect entanglement in a two-qutrit V-type system interacting with reservoirs, highlighting control methods via additional qutrits and interference effects.

Contribution

It introduces a mechanism for long-term entanglement protection based on the formation and control of system-reservoir bound states in a two-qutrit V-type system.

Findings

Bound states enable entanglement preservation.

Adding qutrits enhances bound state stability.

Interference manipulation controls bound state properties.

Abstract

In this work, a mechanism for long time protection of entanglement of a two-qutrit V-type atomic system each of which interacts independently with a dissipative reservoir is investigated. It is shown that the protection process is related exclusively on the formation of bound states in the system-reservoir energy spectrum. It is demonstrated that the degree of boundedness for the system-reservoir bound states is well-controlled by entering other V-type qutrits into the reservoirs, and also through the manipulation of the spontaneously generated interference related to decay channels of the V-type atoms.