Document Type : Research

Authors

• Mina shiri ¹
• Mehrdad Ghominejad ²
• Mohammad Reza Pourkarimi ³

¹ 1. Ph.D. Student, Faculty of Physics, Semnan University, P.O.Box 35195- 363, Semnan, Iran

² Associate Professor, Faculty of Physics, Semnan University, P.O.Box 35195-363, Semnan, Iran

³ Associate Professor Department of Physics, Salman Farsi University of Kazerun, Kazerun, Iran.

Abstract

In this paper, we model a two-qubit system of identical superconducting charge qubits, where Josephson junctions are coupled via a fixed capacitor. In this model, the effects of temperature, Josephson energy, and mutual coupling energy between the two qubits under increase or decrease of coherence and dense coding capacity (DCC) are examined. The results indicate that increasing temperature leads to a reduction in coherence and DCC, while mutual coupling energy contributes to an increase in these two quantities. On the other hand, Josephson energy has an effect opposite to mutual coupling energy, reducing both coherence and DCC.

Keywords

• Two-qubit system
• Quantum coherence
• Dense coding capacity