Generation of large-amplitude coherent-state superposition via ancilla-assisted photon-subtraction
Quantum Physics
2009-11-13 v2
Abstract
We propose and demonstrate a novel method to generate a large-amplitude coherent-state superposition (CSS) via ancilla-assisted photon-subtraction. The ancillary mode induces quantum interference of indistinguishable processes, widening the controllability of quantum superposition at the conditional output. We demonstrate the concept in the time domain, by a simple time-separated two-photon subtraction from cw squeezed light. We observe the largest CSS ever reported without any corrections, which will enable various quantum information applications with CSS states.
Keywords
Cite
@article{arxiv.0806.2965,
title = {Generation of large-amplitude coherent-state superposition via ancilla-assisted photon-subtraction},
author = {Hiroki Takahashi and Kentaro Wakui and Shigenari Suzuki and Masahiro Takeoka and Kazuhiro Hayasaka and Akira Furusawa and Masahide Sasaki},
journal= {arXiv preprint arXiv:0806.2965},
year = {2009}
}
Comments
5 pages, 4 figures; the revised version