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

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.

References in corpus (22)

• A Multiparticle Generalization of Entanglement Swapping
• Josephson-Junction Qubits with Controlled Couplings
• General Scheme for Super Dense Coding between Multi-Parties
• The Bloch Vector for N-Level Systems
• Quantum information processing with superconducting qubits in a microwave field
• Classical information capacity of superdense coding
• Entanglement between two superconducting qubits via interaction with non-classical radiation
• Quantum computing with a single molecular ensemble and a Cooper pair box
• Optimal multiqubit operations for Josephson charge qubits
• Correlated Errors in Quantum Error Corrections
• Hybridized solid-state qubit in the charge-flux regime
• Implementing Shor's algorithm on Josephson Charge Qubits
• Probabilistic Dense Coding Using a Non-symmetric Multipartite Quantum Channel
• Synthesis of maximally entangled mixed states and disentanglement in coupled Josephson charge qubits
• Controlled phase gate for solid-state charge qubits
• Entanglement of superconducting charge qubits by homodyne measurement
• Implementation of the Deutsch-Jozsa algorithm with Josephson charge qubits
• Implementation of Grover search algorithm with Josephson charge qubits
• One-atom maser: Non-separable atom pairs
• Superconducting charge qubits from a microscopic many-body perspective
• Transient spectrum of a single-Cooper-pair box with binomial states
• Relative information encoded in the degree of entanglement to discriminate bipartite states