  Quantum information science and technology (QIST) is a critical and emerging
technology with the potential for enormous world impact and is currently
invested in by over 40 nations. To bring these large-scale investments to
fruition and bridge the lower technology readiness levels (TRLs) of fundamental
research at universities to the high TRLs necessary to realize the promise of
practical quantum advantage accessible to industry and the public, we present a
roadmap for Quantum Technology Demonstration Projects (QTDPs). Such QTDPs,
focused on intermediate TRLs, are large-scale public-private partnerships with
a high probability of translation from laboratory to practice. They create
technology demonstrating a clear 'quantum advantage' for science breakthroughs
that are user-motivated and will provide access to a broad and diverse
community of scientific users. Successful implementation of a program of QTDPs
will have large positive economic impacts.
