Phys. Rev. A 72, 033402 (2005) [7 pages]Free-electron quantum signatures in intense laser fieldsReceived 31 March 2005; published 2 September 2005 Quantum signatures of a free electron in interaction with a continuous-wave radiation field are investigated by looking for negativities in the Wigner function of the system. The free-electron wave function in the radiation field is calculated fully analytically by solving the appropriate Schrödinger equation in the Krammers-Henneberger frame. It is found that pronounced quantum signatures show up already for a laser peak field of magnitude E0=1–2 a.u. and a frequency ω=1 a.u. However, the nonclassical behavior gets lost if the interaction with the radiation field is taken in the dipole approximation. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.72.033402
DOI:
10.1103/PhysRevA.72.033402
PACS:
42.50.Hz, 42.50.Vk, 42.50.Ct, 52.75.Di
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