Heralded generation of multi-photon entanglement

Author(s): P. Walther, M. Aspelmeyer, A. Zeilinger

Journal: Phys. Rev. A

Volume: 75

Page(s): 012313

Year: 2007

DOI Number: 10.1103/PhysRevA.75.012313

Link: Link to publication

Abstract:

We present a scheme, based only on linear optics and standard photon detection, that allows to generate heralded multiphoton entangled states of arbitrary photon number from spontaneous parametric downconversion (PDC) in the weak interaction regime. The scheme also works in the strong interaction regime, i.e., for the production of large photon numbers, when photon-number resolving detectors with nearly perfect quantum efficiency are used. In addition, the same setup can be used for quantum metrology as multiphoton interferometer

with sensitivity at the Heisenberg limit.

Note: http://arxiv.org/abs/0804.2384

File: Link to PDF

Aspelmeyer Group Aspelmeyer Group , Walther Group , Zeilinger Group