Probabilistic quantum cloning via Greenberger-Horne-Zeilinger states - art. no. 042302

We propose a probabilistic quantum cloning scheme using Greenbegr-Horne-Zei linger (GHZ) states, Bell-basis measurements, single-qubit unitary operatio ns, and generalized measurements, all of which are within the reach of curr ent technology. Compared to another possible scheme via Tele-controlled-NOT gate [D. Gottesman and I. L. Chuang, Nature (London) 402, 390 (1999)], the present scheme may be used in experiment to clone the stales of one partic le to those of two two different particles with higher probability and less GHZ resources.