Upper plot: superconducting circuit and its energy level diagram.
Lower plot: microwave storage and retrieval.
Slow and stored light via electromagnetically induced transparency using a Λ-type superconducting artificial atom
Phys. Rev. Research 7, L012015
Kai-I Chu, Xiao-Cheng Lu, Kuan-Hsun Chiang, Yen-Hsiang Lin, Chii-Dong Chen, Ite A. Yu, Wen-Te Liao, and Yung-Fu Chen
Slow and stored light via electromagnetically induced transparency using a Λ-type superconducting artificial atom
本研究成功利用單個超導量子位元與高品質共振腔耦合，構建出 Lambda 型人造原子並觀測到電磁誘發透明（EIT）現象。相較於傳統需大量原子團的系統，本研究僅憑單顆人造原子即可將微波脈衝減速至 3.6 km/s。透過絕熱切斷控制光，微波脈衝能被儲存於共振腔中，達成「按需儲存與取回」。此成果展現了在超導電路中實現微波量子記憶體的潛力，為量子資訊處理技術帶來重要進展。
This study demonstrates the realization of Electromagnetically Induced Transparency (EIT) using a Lambda-type artificial atom formed by coupling a single superconducting qubit to a high-Q resonator. Unlike traditional systems that require atomic ensembles, this research achieves EIT with a single artificial atom, slowing microwave pulses down to 3.6 km/s. By adiabatically turning off the control light, microwave pulses can be stored in the resonator, enabling on-demand storage and retrieval. Our results highlight the potential of achieving microwave quantum memory, promising important advancements in quantum information processing within superconducting circuits.