Entanglement degradation of cavity modes due to the dynamical Casimir effect

TL;DR

This paper investigates how the dynamical Casimir effect influences entanglement between two cavities, revealing different regimes of entanglement degradation based on cavity motion frequency and spectrum, with implications for quantum information processing.

Contribution

It introduces a detailed analysis of entanglement dynamics in shaken cavities, highlighting the impact of cavity spectrum and driving frequency on entanglement degradation.

Findings

Entanglement can degrade asymptotically or oscillate depending on motion parameters.

In equidistant spectra, entanglement can vanish or undergo sudden death.

Mode coupling is limited to two modes in three-dimensional cavities.

Abstract

We study the entanglement dynamics between two cavities when one of them is harmonically shaken in the context of quantum information theory. We find four different regimes depending on the frequency of the motion and the spectrum of the moving cavity. If the moving cavity is three dimensional only two modes inside get coupled and the entanglement can either degrade asymptotically with time or oscillate depending on the driving. On the other hand, if the cavity has an equidistant spectrum the entanglement can either vanish asymptotically if it is driven with its fundamental frequency or have a sudden death if it is driven with an uneven harmonic frequency.