Experimental demonstration of decoherence suppression via quantum measurement reversal

TL;DR

This paper experimentally demonstrates that decoherence in quantum systems can be suppressed using quantum measurement reversal, involving weak and reversing measurements, which is crucial for advancing quantum computing and communication.

Contribution

The study provides the first experimental validation of decoherence suppression via quantum measurement reversal in amplitude damping channels.

Findings

Decoherence can be effectively suppressed using measurement reversal techniques.

A trade-off exists between decoherence suppression and channel transmittance.

Experimental results confirm theoretical predictions of measurement reversal efficacy.

Abstract

Taming decoherence is essential in realizing quantum computation and quantum communication. Here we experimentally demonstrate that decoherence due to amplitude damping can be suppressed by exploiting quantum measurement reversal in which a weak measurement and the reversing measurement are introduced before and after the decoherence channel, respectively. We have also investigated the trade-off relation between the degree of decoherence suppression and the channel transmittance.