Speaker
Description
Quantum noise is one of the main limitations to sensitivity in both the low- and high-frequency interferometers of ET. Reaching the design sensitivity requires the use of frequency-dependent squeezing, which relies on long filter cavities and minimizing losses throughout the entire interferometer. Achieving this is challenging, both technologically and fundamentally. However, considering the decades-long operational timeline of ET, we can imagine significant improvements in these areas, potentially enabling the use of even more advanced quantum technologies. What path could ET follow from its current quantum noise design towards the best sensitivity with future upgrades?
In this talk, I will give an overview of the current challenges related to quantum noise in ET, discuss the key parameters that influence it, and highlight several alternative configurations for both the near and long-term upgrades, and possible implications for the current design.
