24 research outputs found
Robustness of Decoherence-Free Subspaces for Quantum Computation
Full text linkIt was shown recently [D.A. Lidar et al., Phys. Rev. Lett. 81, 2594 (1998)]
that within the framework of the semigroup Markovian master equation,
decoherence-free (DF) subspaces exist which are stable to first order in time
to a perturbation. Here this result is extended to the non-Markovian regime and
generalized. In particular, it is shown that within both the semigroup and the
non-Markovian operator sum representation, DF subspaces are stable to all
orders in time to a symmetry-breaking perturbation. DF subspaces are thus ideal
for quantum memory applications. For quantum computation, however, the
stability result does not extend beyond the first order. Thus, to perform
robust quantum computation in DF subspaces, they must be supplemented with
quantum error correcting codes.Comment: 16 pages, no figures. Several changes, including a clarification of
the derivation of the Lindblad equation from the operator sum representation.
To appear in Phys. Rev
Natural rubber biosynthesis in plants, the rubber transferase complex, and metabolic engineering progress and prospects
No full textThe influence of inhibitors of protein synthesis on the secretion of the carbohydratous trapping slime of Drosophyllum lusitanicum
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Purification and Characterization of Golgi Membrane-Bound Nucleoside Diphosphatase from Suspension-Cultured Cells of Sycamore (Acer pseudoplatanus L.).
No full textCytokinesis in the green alga Eremosphaera viridis: Plasmalemma formation from ?open membranes?
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Structural differentiation of membranes involved in the secretion of polysaccharide slime by root cap cells of cress (Lepidium sativum L.)
No full textGlucosylation of sterols and polyprenolphosphate in the Golgi apparatus of Phaseolus aureus
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