基于原子量子比特的量子密集编码。

Quantum dense coding with atomic qubits.

作者信息

Schaetz T, Barrett M D, Leibfried D, Chiaverini J, Britton J, Itano W M, Jost J D, Langer C, Wineland D J

机构信息

Time and Frequency Division, NIST, Boulder, Colorado 80305-3328, USA.

出版信息

Phys Rev Lett. 2004 Jul 23;93(4):040505. doi: 10.1103/PhysRevLett.93.040505. Epub 2004 Jul 22.

DOI:10.1103/PhysRevLett.93.040505

PMID:15323743

Abstract

We report the implementation of quantum dense coding on individual atomic qubits with the use of two trapped 9Be+ ions. The protocol is implemented with a complete Bell measurement that distinguishes the four operations used to encode two bits of classical information. We measure an average transmission fidelity of 0.85(1) and determine a channel capacity of 1.16(1).

摘要

我们报告了利用两个俘获的(^{9}Be^{+})离子在单个原子量子比特上实现量子密集编码。该协议通过一个完整的贝尔测量来实现，该测量可区分用于编码两个经典信息比特的四种操作。我们测量得到平均传输保真度为(0.85(1))，并确定信道容量为(1.16(1))。