Demonstration of Cluster State Shaping and Quantum Erasure for Continuous Variables

Yoshichika Miwa, Ryuji Ukai, Jun-ichi Yoshikawa, Radim Filip, Peter van Loock, Akira Furusawa

Published 2010-06-11Version 1

We demonstrate experimentally how to remove an arbitrary node from a continuous-variable cluster state and how to shorten any quantum wires of such a state. These two basic operations, performed in an unconditional fashion, are a manifestation of quantum erasure and can be employed to obtain various graph states from an initial cluster state. Starting with a sufficiently large cluster, the resulting graph states can then be used for universal quantum information processing. In the experiment, all variations of this cluster-shaping are demonstrated on a four-mode linear cluster state through homodyne measurements and feedforward.