Migrating existing PyTorch workloads from Nvidia GPUs to Google TPUs using TorchTPU typically requires changing `.to("cuda")` to `.to("tpu")`.

From the articleGoogle Open-Sources TorchTPU, a Native PyTorch Backend for Cloud TPUsAlso in Switch Your PyTorch Model From Nvidia to Google TPUs With One Line: TorchTPU Is Now Open Source, Google open-sources TorchTPU to bring native PyTorch support to its TPUs, Switch Your PyTorch Model From Nvidia to Google TPUs With One Line: TorchTPU Is Now Open Source, Google Open-Sources TorchTPU, a Native PyTorch Backend for Cloud TPUs