Entanglement dynamics of a dc SQUID interacting with a single-mode radiation field

Abstract

In this work, we study the coupling between a superconducting device as a dc SQUID, simulated from an artificial atom with two degrees of freedom, and a single-mode radiation field for the information transference process. We demonstrate that the population transfer among the energy levels of the artificial atom yields entanglement dynamics, which leads to the generation of a pair of photons. Moreover, we show the quantum information transference between the internal modes of the superconducting device, initially in a maximally entangled state, and the radiation field. The artificial atom absorbs the photon, and the radiation field modes become entangled as quantum coherence is transmitted from the superconducting device to the photons. These results strengthen the applicability of superconducting devices for the transference of quantum information, contributing to promising applications in emerging quantum technologies.

Effect of Induced Transition on the Quantum Entanglement and Coherence in Two‐Coupled Double Quantum Dot System

“…[31,32] Numerous research for characterizing the degree of entanglement in multipartite quantum systems have been conducted. [33][34][35][36][37][38][39][40][41][42][43][44][45] However, entanglement does not encompass all quantumness in a system. [46,47] On the other hand, quantum coherence is derived from the quantum state superposition principle.…”

Effect of induced transition on the quantum entanglement and coherence in two-coupled double quantum dots system

“…Despite its enormous promise, measuring and characterizing entanglement in multipartite quantum systems is a rather complicated task [24,25]. Numerous research for characterizing the degree of entanglement in multipartite quantum systems have been conducted [26][27][28][29][30][31][32][33][34][35][36]. However, entanglement does not encompass all quantumness in a system [37,38].…”