There is great interest in building an actual quantum computer. Many strategies for building a quantum memory register are currently being evaluated. The study of quantum computing is a relatively new field, and the experimental implementation is still in its infancy. Consequently the world wide web is the best place to search for information regarding current research.
One possible way to implement a quantum memory register is by using nuclear magnetic resonance techniques to manipulate classical fluids to perform quantum calculations. To read more on this see:
http://www.sciam.com/1998/0698issue/0698gershenfeld.html
http://squint.stanford.edu/qc/overview.html
A second approach is to use ion traps and lasers to hold atomic ions in place. To read more about this method check:
http://physics.colorado.edu/faculty/monroe.c.html
http://www.bldrdoc.gov/timefreq/ion/index.htm
A good place to look for original research papers is the Los Alamos National Laboratories E-print archive at:
http://quickreviews.org/
This is by no means a comprehensive list of approaches to or research regarding quantum computing. Given the dynamic nature of the web, you will be able find more current information about quantum computing from your favorite web search engine or directory service.