Method for identifying electromagnetically induced transparency in a tunable circuit quantum electrodynamics system

Abstract

Electromagnetically induced transparency (EIT) has been realized in atomic systems, but fulfilling the EIT conditions for artificial atoms made from superconducting circuits is a more difficult task. Here we report an experimental observation of the EIT in a tunable three-dimensional transmon by probing the cavity transmission. To fulfill the EIT conditions, we tune the transmon to adjust its damping rates by utilizing the effect of the cavity on the transmon states. From the experimental observations, we clearly identify the EIT and Autler-Townes splitting (ATS) regimes as well as the transition regime in between. Also, the experimental data demonstrate that the threshold ${\Omega }_{\mathrm{AIC}}$ determined by the Akaike information criterion can describe the EIT-ATS transition better than the threshold ${\Omega }_{\mathrm{EIT}}$ given by the EIT theory.

8 pages, 6 figures

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• Reflective amplification without population inversion from a strongly driven superconducting qubit
• Phase-controlled pathway interferences and switchable fast-slow light in a cavity-magnon polariton system
• Time-domain grating with a periodically driven qutrit
• Tunneling-induced transparency and Autler-Townes splitting in a triple quantum dot
• Tuneable and weakly-invasive probing of a superconducting resonator based onelectromagnetically induced transparency
• Frequency-encoded linear cluster states with coherent Raman photons
• Tunable $\Lambda$-type system made of a superconducting qubit pair
• Controlled-NOT gate based on the Rydberg states of surface electrons
• Tunable quantum interference effects in Floquet two- and three-level systems
• Coherence as an indicator to discern electromagnetically induced transparency and Autler-Townes splitting
• Microwave-assisted coherent control of ultracold polar molecules with a ladder-type rotational states