Physics – Quantum Physics
Scientific paper
2011-01-06
Phys. Rev. A 83, 052307 (2011)
Physics
Quantum Physics
16 pages, 17 figures
Scientific paper
10.1103/PhysRevA.83.052307
We experimentally demonstrate phase-insensitive linear optical amplification which preserves the idler at the output. Since our amplification operation is unitary up to small excess noise, it is reversible beyond the classical limit. The entanglement between the two output modes is the resource for the reversibility. The amplification gain of 2.0 is demonstrated. In addition, combining this amplifier with a beamsplitter, we also demonstrate approximate cloning of coherent states where an anticlone is present. We investigate the reversibility by reconstructing the initial state from the output correlations, and the results are slightly beyond the cloning limit. Furthermore, full characterization of the amplifier and cloner is given by using coherent states with several different mean values as inputs. Our amplifier is based on linear optics, offline preparation of nonclassical ancillas, and homodyne measurements followed by feedforward. Squeezed states are used as the ancillas, and nonlinear optical effects are exploited only for their generation. The ancillas introduce nonclassicality into the amplifying operation, making entanglement at the output.
Filip} Radim
Furusawa Akira
Miwa Yoshichika
Yoshikawa Jun-ichi
No associations
LandOfFree
Demonstration of reversible phase-insensitive optical amplifier does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Demonstration of reversible phase-insensitive optical amplifier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Demonstration of reversible phase-insensitive optical amplifier will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-398637