一种简单的纠缠光门的演示及其在贝尔态分析中的应用。

Demonstration of a simple entangling optical gate and its use in bell-state analysis.

作者信息

Langford N K, Weinhold T J, Prevedel R, Resch K J, Gilchrist A, O'Brien J L, Pryde G J, White A G

机构信息

Centre for Quantum Computer Technology, University of Queensland, Brisbane QLD 4072, Australia.

出版信息

Phys Rev Lett. 2005 Nov 18;95(21):210504. doi: 10.1103/PhysRevLett.95.210504.

DOI:10.1103/PhysRevLett.95.210504

PMID:16384124

Abstract

We demonstrate a new architecture for an optical entangling gate that is significantly simpler than previous realizations, using partially polarizing beam splitters so that only a single optical mode-matching condition is required. We demonstrate operation of a controlled-z gate in both continuous-wave and pulsed regimes of operation, fully characterizing it in each case using quantum process tomography. We also demonstrate a fully resolving, nondeterministic optical Bell-state analyzer based on this controlled-z gate. This new architecture is ideally suited to guided optics implementations of optical gates.

摘要

我们展示了一种用于光学纠缠门的新架构，它比以前的实现方式要简单得多，使用部分偏振分束器，因此只需要一个单一的光学模式匹配条件。我们展示了受控Z门在连续波和脉冲操作模式下的运行情况，并在每种情况下使用量子过程层析成像对其进行了全面表征。我们还展示了基于这种受控Z门的全分辨、非确定性光学贝尔态分析仪。这种新架构非常适合光学门的导波光学实现。