Not strictly google but microsoft/bing too, here's the top ones from my notes:
https://arxiv.org/abs/2410.14452 spfresh,
https://arxiv.org/abs/2111.08566 spann,
https://arxiv.org/abs/2405.12497 rabitq,
https://arxiv.org/abs/2509.06046 diskann,
I have a variety of blogs that I used too and reference implementations!
It's a Rabit[Q]uantized Hierchical Balanced Clustering algorithm we use for the vector index and we use a chunked segment index for the sparse index if you're curious! Happy to discuss more!
