Correlations in twisted double-layer graphene with virtual photons in a microcavity.

J Phys Condens Matter

Departamento de Física, Universidad Nacional del Sur, Avenida Alem 1253, B8000CPB, Bahía Blanca, Argentina.

Published: January 2022

We analyze the entanglement generation of a system composed of two decoupled rotated graphene layers inside a planar microcavity. By considering the electromagnetic field of the cavity in the vacuum state and using time-dependent perturbation theory it is possible to obtain the range of geometric parameters at which the quantum states of electrons in different layers are entangled. By employing the negativity measure, correlations between layers are obtained for time scales smaller than the light-crossing time of the layers. It is shown that the negativity measure is modulated by the rotation angle between layers, allowing manipulation ofstates. Finally, an experimental protocol is analyzed in order to detect non-causal effects between layers, by allowing back-voltage switching functions in the two layers with supports that do not overlap in time. By turning off the second-back voltage at a time smaller than the light-crossing time, it is possible to obtain correlations between layers through the independent interaction with virtual photons. The exchange of virtual photons implies that the propagator can be nonzero outside the light cone and this non-causal propagation can create entangled quantum states.

Download full-text PDF

Source
http://dx.doi.org/10.1088/1361-648X/ac4400DOI Listing

Publication Analysis

Top Keywords

virtual photons
12
layers
8
quantum states
8
negativity measure
8
correlations layers
8
smaller light-crossing
8
light-crossing time
8
layers allowing
8
time
5
correlations twisted
4

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!