Entanglement preservation for multilevel systems under non-ideal pulse control

TL;DR

This paper explores methods to preserve entanglement between multilevel quantum systems under realistic pulse control, using a fidelity-based approach and numerical testing to demonstrate potential for quantum information applications.

Contribution

It introduces a universal fidelity-based characterization for entanglement preservation under non-ideal pulses in multilevel systems, validated through numerical simulations.

Findings

Effective entanglement preservation demonstrated under non-ideal pulse control

Validation of the approximation method for decoherence suppression

Potential applications in quantum information processing

Abstract

We investigate how to effectively preserve the entanglement between two noninteracting multilevel oscillators coupled to a common reservoir under non-ideal pulse control. A universal characterization using fidelity is developed for the behavior of the system based on Nakajima-Zwanzig projection operator technique. Our analysis includes the validity of the approximation method and the decoherence-suppression by the non-ideal pulse control. The power of our strategy for protecting entanglement is numerically tested, showing potential applications for quantum information processing.