Publication details for Professor Nancy CartwrightCartwright, N.D. (1975). A Non-Negative Wigner-Type Distribution. Physica A: Statistical Mechanics and its Applications 83(1): 210-212.
- Publication type: Journal Article
- ISSN/ISBN: 0378-4371
- DOI: 10.1016/0378-4371(76)90145-X
- Further publication details on publisher web site
Author(s) from Durham
The Wigner function, which is commonly used as a joint distribution for non-commuting observables, is shown to be non-negative in all quantum states when smoothed with a gaussian whose variances are greater than or equal to those of the minimum uncertainty wave packet.