I read somewhere that computational power of QC of several thousand qubits will be stronger then computational power of classical computer in the size of all Universe.
I have read this sort of claim as well. However, I recommend skepticism; there has been a lot of hyperbole in the popular press regarding the potential power of quantum computing. A good source of objective information about the potential and limitations of quantum computing is Scott Aaronson’s blog, Shtetl-Optimized. Scott was a professor at MIT and is now at the University of Texas at Austin—he is very knowledgeable about QC and, equally important, he is an engaging writer that can make complex topics (reasonably) clear to non-specialists. He has spent a bit of time on his blog debunking some of the wilder claims regarding the power of QC.
I have read this sort of claim as well. However, I recommend skepticism; there has been a lot of hyperbole in the popular press regarding the potential power of quantum computing. A good source of objective information about the potential and limitations of quantum computing is Scott Aaronson’s blog, Shtetl-Optimized. Scott was a professor at MIT and is now at the University of Texas at Austin—he is very knowledgeable about QC and, equally important, he is an engaging writer that can make complex topics (reasonably) clear to non-specialists. He has spent a bit of time on his blog debunking some of the wilder claims regarding the power of QC.