Tunable electromagnetically induced transparency with a coupled superconducting system

TL;DR

This paper proposes a tunable electromagnetically induced transparency (EIT) scheme in a superconducting system combining a flux qubit and a resonator, enabling control of EIT in the microwave regime for potential quantum applications.

Contribution

It introduces a novel, tunable EIT method in superconducting circuits using dressed states of a flux qubit and resonator, expanding EIT applications beyond atomic systems.

Findings

Demonstrates EIT in a superconducting flux qubit-resonator system

Shows physical origin of EIT in artificial superconducting systems

Highlights potential for tunable quantum control in microwave regime

Abstract

Electromagnetically induced transparency (EIT) has usually been demonstrated by using three-level atomic systems. In this paper, we theoretically proposed an efficient method to realize EIT in microwave regime through a coupled system consisting of a flux qubit and a superconducting LC resonator with relatively high quality factor. In the present composed system, the working levels are the dressed states of a two-level flux qubit and the resonators with a probe pump field. There exits a second order coherent transfer between the dressed states. By comparing the results with those in the conventional atomic system we have revealed the physical origin of the EIT phenomenon in this composed system. Since the whole system is artificial and tunable, our scheme may have potential applications in various domains.