Using shortcut to adiabatic passage for the ultrafast quantum state transfer in cavity QED system

TL;DR

This paper introduces a fast quantum state transfer method in cavity QED systems using shortcut to adiabatic passage, enabling high-fidelity transfer despite decoherence effects.

Contribution

It presents an invariant-based inverse engineering scheme for ultrafast quantum state transfer between atoms in cavity QED, with practical pulse shaping for experiments.

Findings

High-fidelity ultrafast state transfer achieved in simulations.

Robustness against atomic spontaneous emission and cavity photon leakage.

Design of Gaussian-type waveforms for realistic implementation.

Abstract

We propose an alternative scheme to implement the quantum state transfer between two three-level atoms based on the invariant-based inverse engineering in cavity quantum electronic dynamics (QED) system. The quantum information can be ultrafast transferred between the atoms by taking advantage of the cavity field as a medium for exchanging quantum information speedily. Through designing the time-dependent laser pulse and atom-cavity coupling, we send the atoms through the cavity with a short time interval experiencing the two processes of the invariant dynamics between each atom and the cavity field simultaneously. Numerical simulation shows that the target state can be ultrafast populated with a high fidelity even when considering the atomic spontaneous emission and the photon leakage out of the cavity field. We also redesign a reasonable Gaussian-type wave form in the atom-cavity coupling for the realistic experiment operation.