A novel method for preparation of a single photon in temporally-delocalized entangled modes is proposed and analyzed. We show that two single-photon pulses propagating in a driven nonabsorbing medium with different group velocities are temporally split under parametric interaction into well-separated pulses. In consequence, the single-photon "time-bin-entangled" states are generated with a programmable entanglement easily controlled by driving field intensity. The experimental study of nonclassical features and nonlocality of generated states by means of balanced homodyne tomography is discussed.
@article{arxiv.quant-ph/0605124,
title = {Preparation of a Single Photon in Time-bin Entangled States via Photon Parametric Interaction},
author = {N. Sisakyan and Yu. Malakyan},
journal= {arXiv preprint arXiv:quant-ph/0605124},
year = {2007}
}