We show that a thermal light random in transverse direction can perform subwavelength double slit interference in a joint-intensity measurement. This is the classical version of quantum lithography, and it can be explained with the correlation of rays instead of the entanglement of photons.
@article{arxiv.quant-ph/0404078,
title = {Coincidence Subwavelength Interference by a Classical Thermal Light},
author = {Kaige Wang and De-zhong Cao},
journal= {arXiv preprint arXiv:quant-ph/0404078},
year = {2007}
}