LIGO Document T2100198-v1
- In this project, we work with the PT-symmetric interferometer. We aim to explore a more complete PT-symmetric structure to improve the low-frequency noise spectrum by back-action evasion with an effective negative mass. The effective negative mass will be possibly be achieved using parametric amplification and optical damping formed by multiple additional pumpings, and hence, have a larger bandwidth with sacrificing less of the sensitivity than we would for a conventional trade-off between the bandwidth and sensitivity.
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