Nondeterministic Amplifier for Two Photon Superpositions

Details Nondeterministic Amplifier for Two Photon Superpositions Nondeterministic Amplifier for Two Photon Superpositions

2010-12-14

arxiv.org/abs/1012.3008v2

Phys. Rev. A 82, 063828 (2010)

Physics

Quantum Physics

References re-ordered, one added. Some typos corrected. Journal reference added. 8 pages, 10 figs

Scientific paper

10.1103/PhysRevA.82.063828

We examine heralded nondeterministic noiseless amplification based on the quantum scissors device, which has been shown to increase the one-photon amplitude of a state at the expense of the vacuum-state amplitude. Here we propose using the same basic design to perform perfect amplification in a basis set of up to two photons. The device is much more efficient than several one-photon amplifiers working in tandem. When used to amplify coherent states this advantage is shown using either fidelity or in terms of probability of sucessful action, or more strikingly in a combination of the two.

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