Ralph T C, Söllner I, Mahmoodian S, White A G, Lodahl P
Centre for Quantum Computation and Communication Technology, School of Mathematics and Physics, University of Queensland, Brisbane, Queensland 4072, Australia.
Niels Bohr Institute, University of Copenhagen, Blegdamsvej 17, DK-2100 Copenhagen, Denmark.
Phys Rev Lett. 2015 May 1;114(17):173603. doi: 10.1103/PhysRevLett.114.173603. Epub 2015 Apr 30.
Although the strengths of optical nonlinearities available experimentally have been rapidly increasing in recent years, significant challenges remain to using such nonlinearities to produce useful quantum devices such as efficient optical Bell state analyzers or universal quantum optical gates. Here we describe a new approach that avoids the current limitations by combining strong nonlinearities with active Gaussian operations in efficient protocols for Bell state analyzers and controlled-sign gates.
尽管近年来实验上可获得的光学非线性强度一直在迅速增加，但利用这些非线性来制造诸如高效光学贝尔态分析仪或通用量子光学门等有用的量子器件仍面临重大挑战。在此，我们描述了一种新方法，该方法通过在用于贝尔态分析仪和受控信号门的高效协议中，将强非线性与有源高斯操作相结合，避免了当前的限制。
