Speaker
Prof.
Michelle Simmons
(University of New South Wales, Australia)
Description
Abstract: Down-scaling has been the leading paradigm of
the semiconductor industry since the invention of the first
transistor in 1947. However miniaturization will soon reach
the ultimate limit, set by the discreteness of matter, leading
to intensified research in alternative approaches for creating
logic devices. One of the most exciting of these is quantum
computation. We will present devices that address the
ultimate limit of device miniaturization in silicon where we
have patterned dopants in a crystalline environment with
atomic precision to act as one-dimensional leads, single-
electron transistors and control gates. In particular we
demonstrate precision-single-atom transistors, spin-read-
out in a scalable silicon quantum computing architecture
and a direct measurement of exchange coupling in donor
based systems. We will discuss the benefits of donors as
qubits and address some of the challenges to achieving truly
atomically precise devices in all three spatial dimensions.