Dynamics of encrypted information in the presence of imperfect operations

TL;DR

This paper studies how encrypted information behaves in a quantum channel involving a Cooper pair and a cavity, focusing on the effects of imperfect operations and various parameters on information dynamics.

Contribution

It introduces a model analyzing the dynamics of coded and decoded quantum information in a dense coding protocol with imperfections and parameter variations.

Findings

Information increases with higher detuning and fewer cavity photons

Coded and decoded information improve as the capacity ratio decreases

Phase errors have a greater impact on information sensitivity than bit flip errors

Abstract

The original dense coding protocol is achieved via quantum channel generated between a single Cooper pair and a cavity. The dynamics of the coded and decoded information are investigated for different values of the channel's parameters. The efficiency of this channel for coding and decoding information depends on the initial state settings of the Cooper pair. It is shown that, these information increase as the detuning parameter increases or the number of photons inside the cavity decreases. The coded and decoded information increase as the ratio of the capacities between the box and gate decreases. In the presence of imperfect operation, the sensitivity of the information to the phase error is much larger than the bit flip error.