We provide a quantum description of X waves by considering two different kinds of quantum states of the electromagnetic field whose field amplitude expectation value coincides with a propagation-invariant solution of the Maxwell equation. The difference between the two states is of pure quantum mechanical origin since they are internally entangled and disentangled and can be generated by different linear or nonlinear processes.
© 2007 Optical Society of America
Original Manuscript: April 12, 2007
Revised Manuscript: May 31, 2007
Manuscript Accepted: June 3, 2007
Published: August 13, 2007
Alessandro Ciattoni and Claudio Conti, "Quantum electromagnetic X waves," J. Opt. Soc. Am. B 24, 2195-2198 (2007)