(英) |
This paper shows that an arbitrary Gaussian pure state can be deterministically generated in a dissipa-
tive open system that locally couples to surrounding environment and has quasi-local interactions among internal
components. A quasi-local interaction, which means that the interaction occurs among only a few subsystems, is a
crucial requirement for practical engineering of a dissipative system. The key idea is that, rst, an auxiliary system
having local interaction with environment is prepared, and then auxiliary system is coupled to the target system via
a set of two-body Hamiltonians in such a way that the pure steady state condition is satised. Moreover, even in a
very special case where the auxiliary system is only a single-mode system, it is shown that deterministic generation
of an important class of Gaussian states is also possible, by devising an appropriate switching scheme. |