High-Fidelity Entangled Bell States via Shortcuts to Adiabaticity

TL;DR

This paper introduces shortcut to adiabaticity protocols using TQD and LRI methods to rapidly generate high-fidelity entangled Bell states, maintaining robustness and efficiency even in very short times.

Contribution

It develops novel protocols based on TQD and LRI techniques for fast, robust entangled state preparation in two-qubit systems.

Findings

High-fidelity Bell states achieved rapidly

Protocols maintain robustness and efficiency in short times

Both TQD and LRI methods are effective

Abstract

We present a couple of protocols based on shortcut to adiabaticity techniques for rapid generation of robust entangled Bell states in a system of two two-state systems. Our protocols rely on the so-called transitionless quantum driving (TQD) algorithm and Lewis-Riesenfeld invariant (LRI) method. Both TQD and LRI methods result in high fidelity in population transfer.Our study shows that it is possible to prepare an entangled state in infinitely short time without losing robustness and efficiency.