An ALMA [CII] survey of 26 Radio-Loud Quasars at z>5

Feedback processes are invoked to be crucial in early (within 1 Gyr from the Big Bang) massive galaxy evolution. In particular, radio-jets are thought to play a key role in shaping the host galaxy/black hole co-evolution in highly accreting early AGN. However, despite the fact that the sample of radio loud (RL) quasars at z>5 doubled in the last few years, little is currently known about radio-mode feedback at such redshifts.Initial sub-mm observations of a few RL quasars provide intriguing clues, but any more general result is hampered by the limited amount of data.