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Quantum Algorithms

Strong micro-macro entanglement from a weak cross-Kerr nonlinearity

arXiv
Authors: Tian Wang, Hon Wai Lau, Hamidreza Kaviani, Roohollah Ghobadi, Christoph Simon

Year

2014

Paper ID

46002

Status

Preprint

Abstract Read

~2 min

Abstract Words

79

Citations

N/A

Abstract

We study the entanglement generated by a weak cross-Kerr nonlinearity between two initial coherent states, one of which has an amplitude close to the single-photon level, while the other one is macroscopic. We show that strong micro-macro entanglement is possible for weak phase shifts by choosing the amplitude of the macroscopic beam sufficiently large. We analyze the effects of loss and discuss possible experimental demonstrations of the micro-macro entanglement based on homodyne tomography and on a new entanglement witness.

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  • We study the entanglement generated by a weak cross-Kerr nonlinearity between two initial coherent states, one of which has an amplitude close to the single-photon level, while...

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