A novel scheme for entanglement engineering in a fermionic system

TL;DR

This paper introduces a new method for controlling entanglement in a three-site fermionic Hubbard model, using two tunable parameters to switch entanglement on or off, akin to a transistor switch.

Contribution

It proposes a novel entanglement engineering scheme in a fermionic system with a minimal three-site Hubbard model, featuring tunable parameters for control.

Findings

Entanglement can be precisely tuned using two parameters.

The system can switch entanglement on or off, mimicking a transistor.

The scheme offers a controllable way to engineer quantum entanglement.

Abstract

We present a novel scheme to engineer the entanglement in a fermionic system, which is modeled by a minimally three-site Hubbard model. It is found that, in this type of system, we can have two free parameters. One is used to tune the entanglement and the other to switch on or off the above tuning function. The whole process is much like what happens in a traditional transistor switch, where the main current between the emitter and collector can be turned on or off by the base current.