By employing at recent proposal (R. Filip, P. Marek and U.L. Andersen, Phys. Rev. A {\bf 71}, 042308 (2005) \cite{Filip05.pra}), we experimentally demonstrate a universal, deterministic and high-fidelity squeezing transformation of an optical field. It relies only on linear optics, homodyne detection, feedforward and an ancillary squeezed vacuum state, thus direct interaction between a strong pump and the quantum state is circumvented. We demonstrate three different squeezing levels for a coherent state input. This scheme is highly suitable for the fault-tolerant squeezing transformation in a continuous variable quantum computer.
@article{arxiv.quant-ph/0702049,
title = {Demonstration of deterministic and high fidelity squeezing of quantum information},
author = {Jun-ichi Yoshikawa and Toshiki Hayashi and Takayuki Akiyama and Nobuyuki Takei and Alexander Huck and Ulrik L. Andersen and Akira Furusawa},
journal= {arXiv preprint arXiv:quant-ph/0702049},
year = {2009}
}