使用见证算符对多体纠缠进行实验检测。

Experimental detection of multipartite entanglement using witness operators.

作者信息

Bourennane Mohamed, Eibl Manfred, Kurtsiefer Christian, Gaertner Sascha, Weinfurter Harald, Gühne Otfried, Hyllus Philipp, Bruss Dagmar, Lewenstein Maciej, Sanpera Anna

机构信息

Max-Planck-Institut für Quantenoptik, D-85748 Garching, Germany.

出版信息

Phys Rev Lett. 2004 Feb 27;92(8):087902. doi: 10.1103/PhysRevLett.92.087902. Epub 2004 Feb 26.

DOI:10.1103/PhysRevLett.92.087902

PMID:14995816

Abstract

We present the experimental detection of genuine multipartite entanglement using entanglement witness operators. To this aim, we introduce a canonical way of constructing and decomposing witness operators so that they can be directly implemented with present technology. We apply this method to three- and four-qubit entangled states of polarized photons, giving experimental evidence that the considered states contain true multipartite entanglement.

摘要

我们展示了使用纠缠见证算符对真正多体纠缠进行的实验检测。为此，我们引入了一种构建和分解见证算符的规范方法，以便能够直接利用现有技术来实现它们。我们将此方法应用于偏振光子的三量子比特和四量子比特纠缠态，给出了所考虑的态包含真正多体纠缠的实验证据。