X-ray cavity quantum optics of inner-shell transitions
Abstract
In the last decade, X-ray quantum optics has become a new research field, owing to significant advances in X-ray sources such as new-generation synchrotron radiations and X-ray free electron lasers, as well as improvements in X-ray methods and sample fabrication. A very successful physical platform is the X-ray planar thin-film cavity, also known as the X-ray cavity QED setup, which represents a significant branch of X-ray quantum optics. So far, most of X-ray cavity quantum optical studies are based on the Mössbauer nuclear resonance. However, the application scope is limited by the scarcity of available nuclear isotope candidates and the lack of universal applicability. Recently, X-ray cavity quantum control in atomic inner-shell transitions has been realized in experiments where the cavity effects simultaneously modify the transition energy and the core-hole lifetime. These pioneer researches indicate that the X-ray cavity quantum optics with inner-shell transitions will become a new and promising platform. In fact, the core-hole state is a fundamental concept in various modern X-ray spectroscopic techniques. Therefore, integrating X-ray quantum optics with X-ray spectroscopy may have potential applications in the field of core-level spectroscopy.In this review, we introduce the experimental systems for the X-ray cavity quantum optics with inner-shell transitions, including the cavity structure, sample fabrications, and experimental methods. We explain that X-ray…
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