Enhancement of transmission rates in quantum memory channels with damping

TL;DR

This paper demonstrates that using a quantum channel modeled as a damped harmonic oscillator without resetting can enhance transmission rates for quantum and classical information, with applications to micromasers.

Contribution

It introduces a method to increase transmission rates in quantum memory channels by exploiting memory effects without resetting the oscillator.

Findings

Memory effects improve transmission rates.

No-reset protocol benefits quantum and classical info transfer.

Applicable to micromaser technology.

Abstract

We consider the transfer of quantum information down a single-mode quantum transmission line. Such quantum channel is modeled as a damped harmonic oscillator, the interaction between the information carriers -a train of N qubits- and the oscillator being of the Jaynes-Cummings kind. Memory effects appear if the state of the oscillator is not reset after each channel use. We show that the setup without resetting is convenient in order to increase the transmission rates, both for the transfer of quantum and classical private information. Our results can be applied to the micromaser.