Dynamics of Bloch vectors and the channel capacity of a non identical charged qubit pair

TL;DR

This paper investigates how the dynamics of Bloch vectors affect the entanglement and channel capacity of a non-identical charged qubit pair in a superconducting circuit, highlighting the influence of initial states, coupling, and photon number.

Contribution

It analyzes the dynamics of entanglement and channel capacity in a coupled qubit system, emphasizing the impact of system parameters on quantum information performance.

Findings

Initial state settings significantly influence entanglement.

Coupling constant affects the degree of entanglement.

Mean photon number impacts channel capacity.

Abstract

We have considered a system of two superconducting charge qubits capacitively coupled to a microwave resonator. The dynamics of the Bloch vectors are investigated for different regimes. By means of the Bloch vectors and cross dyadic we quantify the degree of entanglement contained in the generated entangled state. We consider different values of the system parameters to discuss the dynamics of the channel capacity between the qubits. We show that there is an important role played by initial state settings, coupling constant and the mean photon number on generating entangled state with high degree of entanglement and high capacity.