6533b825fe1ef96bd12833ae
RESEARCH PRODUCT
Quantum cloning in spin networks
Rosario FazioGabriele De ChiaraChiara MacchiavelloG. Massimo PalmaSimone Montangerosubject
PhysicsQuantum opticsQuantum PhysicsQuantum decoherenceCondensed Matter - Mesoscale and Nanoscale PhysicsFOS: Physical sciencesAtomic and Molecular Physics and Optics; Physics and Astronomy (all)Quantum PhysicsQuantum numberAtomic and Molecular Physics and Opticssymbols.namesakePhysics and Astronomy (all)Quantum mechanicsAtomic and Molecular PhysicsMesoscale and Nanoscale Physics (cond-mat.mes-hall)symbolsSpin networkQuantum cloningand OpticsHamiltonian (quantum mechanics)Quantum information scienceQuantum Physics (quant-ph)Quantumdescription
We introduce an approach to quantum cloning based on spin networks and we demonstrate that phase covariant cloning can be realized using no external control but only with a proper design of the Hamiltonian of the system. In the 1 -> 2 cloning we find that the XY model saturates the value for the fidelity of the optimal cloner and gives values comparable to it in the genera N -> M case. We finally discuss the effect of external noise. Our protocol is much more robust to decoherence than a conventional procedure based on quantum gates.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2004-02-10 |