Lifting mod $p$ Galois representations over local fields

Source abstract

Let $K$ be a local field with absolute Galois group $G_{K}$ and let $k$ be a finite field of characteristic $p$. We prove that every continuous representation $G_K\to \operatorname{GL}_{n}(k)$ lifts to a continuous representation $G_K\to\operatorname{GL}_{n}(W(k))$ where $W(k)$ is the ring of infinite Witt vectors over $k$.