Schroedinger cat states and optimum universal quantum cloning by entangled parametric amplification

被引：61

作者：

De Martini, F

Mussi, V

Bovino, F

机构：

[1] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy

[2] Univ Roma La Sapienza, Ist Nazl Fis Mat, I-00185 Rome, Italy

来源：

OPTICS COMMUNICATIONS | 2000年 / 179卷 / 1-6期

关键词：

D O I：

10.1016/S0030-4018(00)00611-8

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The new process of quantum-injection by a single-photon in a pure quantum superposition state into an optical parametric amplifier operating in entangled configuration is adopted to generate an all optical multiphoton Schroedinger-cat state which is largely detectable against the squeezed-vacuum noise. The invariance properties of the OPA interaction hamiltonian show that, under certain conditions, the device may act as a universal quantum cloning machine (UQCM) of the input qubits, Preliminary results here reported show the first experimental realization of such a device based on stimulated emission process in an optical parametric amplifier. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：581 / 589

页数：9

共 46 条

[1] Experimental realization of teleporting an unknown pure quantum state via dual classical and Einstein-Podolsky-Rosen channels [J].