Naslov
Engineering massive quantum memories by topologically time-modulated spin rings

Autori
Giampaolo, S. M. ; Illuminati, F. ; Lisi, A. ; Siena, S.

Izvornik
Laser Physics (1054-660X) 16 (2006), 10; 1411-1417

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, ostalo

Ključne riječi
quantum information

Sažetak
Abstract—We introduce a general scheme to realize perfect storage of quantum information in systems of interacting qubits. This novel approach is based on global external controls of the Hamiltonian that yield time- periodic inversions in the dynamical evolution allowing a perfect periodic quantum state reconstruction. We illustrate the method in the particularly interesting and simple case of spin systems affected by XY residual inter- actions with or without static imperfections. The global control is achieved by step time inversions of an overall topological phase of the Aharonov–Bohm type. Such a scheme holds both at finite size and in the thermody- namic limit, thus enabling the massive storage of arbitrarily large numbers of local states, and is stable against several realistic sources of noise and imperfections.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA