What's actually possible vs what's theoretically possible vs what's actually useful with quantum computing? Victor V. Albert of University of Maryland and NIST simplifies! Victor on Twitter: https://www.youtube.com/channel/UCzMD3lgV9Uk6k1fHd9plWGA Entire Quantum playlist:    • Quantum Computing   https://www.facebook.com/computerphile https://twitter.com/computer_phile This video was filmed and edited by Sean Riley. Computer Science at the University of Nottingham: https://bit.ly/nottscomputer Computerphile is a sister project to Brady Haran's Numberphile. More at http://www.bradyharan.com/