Topological protection

Qualitatively, one can understand the idea of the topological protection on the example of the chessboard model shown in Fig. 1. In this model each square is either black or white, its state is described by the quantum spin 1/2 variable. The allowed dynamics flips simultaneously four spins in the adjacent squares ... 

POSSIBLE IMPLEMENTATION OF TOPOLOGICALLY PROTECTED QUBITS BY A NOVEL CLASS OF JOSEPHSON JUNCTION ARRAYS... 

Functional groups can be introduced at different locations in the dendrimer. Placement in the core of the dendrimer results in a topological isolation and protection of the functional group from the environment [48,49]. Furthermore, single shells of the dendrimer corresponding to different generations can be endowed with functionalities [50]. Thus particles with functions having a defined depth under the surface can be realized. The decoration of the dendrimer sur-... 

Moreover, each of the four ortho carbons is also protected from the approach of external reagents by these bromine groups. This stabilization enabled us to introduce connecting groups at the para position of the monomer diazo compound (e.g., 119) to give the functionalized monomer 120, and then to connect it to an appropriate linker satisfying the topological requirement for intramolecular... 

The use of oxime bond formation with orthogonal protection techniques allows the efficient construction of an antiparallel four-helix-bundle TASP122 (Scheme 19) by condensing amphiphilic peptide blocks, containing aldehyde functions at the C- or N-terminus, to a topological template functionalized with selectively addressable aminooxy acetic acid moieties, t20,22,971... 

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