Nonclassicality of Thermal Radiation
arXiv:quant-ph/0402105 · doi:10.1088/1464-4266/6/12/L01
Abstract
It is demonstrated that thermal radiation of small occupation number is strongly nonclassical. This includes most forms of naturally occurring radiation. Nonclassicality can be observed as a negative weak value of a positive observable. It is related to negative values of the Margenau-Hill quasi-probability distribution.
3 pages, 3 figures