Article Information
vol. 301 no. 5641 1882-1884
- Received for publication July 18, 2003
- Accepted for publication August 21, 2003
- .
Author Information
- 1 Department of Computer Science, Duke University, Durham, NC 27708, USA.
- 2 Department of Physics, Duke University, Durham, NC 27708, USA.
- ↵* To whom correspondence should be addressed. E-mail: thl{at}cs.duke.edu (T.H.L); hy1{at}cs.duke.edu (H.Y.)