Browne Daniel E, Rudolph Terry
QOLS, Blackett Laboratory, Imperial College London, Prince Consort Road, London SW7 2BW, United Kingdom.
Phys Rev Lett. 2005 Jul 1;95(1):010501. doi: 10.1103/PhysRevLett.95.010501. Epub 2005 Jun 27.
We introduce a scheme for linear optics quantum computation, that makes no use of teleported gates, and requires stable interferometry over only the coherence length of the photons. We achieve a much greater degree of efficiency and a simpler implementation than previous proposals. We follow the "cluster state" measurement based quantum computational approach, and show how cluster states may be efficiently generated from pairs of maximally polarization entangled photons using linear optical elements. We demonstrate the universality and usefulness of generic parity measurements, as well as introducing the use of redundant encoding of qubits to enable utilization of destructive measurements--both features of use in a more general context.
我们介绍了一种线性光学量子计算方案，该方案不使用隐形传态门，并且仅需在光子的相干长度上进行稳定的干涉测量。与先前的方案相比，我们实现了更高的效率和更简单的实现方式。我们遵循基于“簇态”测量的量子计算方法，并展示了如何使用线性光学元件从最大偏振纠缠光子对中高效生成簇态。我们证明了通用奇偶性测量的通用性和实用性，并介绍了使用量子比特的冗余编码来实现破坏性测量的应用——这两个特性在更一般的情况下都有用。
