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This is a continuation of the preceding paper (hep–ph/0108219). First of all we make a brief review of generalized coherent states based on Lie algebra su(1,1) and prove that the resolution of unity can be obtained by the curvature form of some bundle. Next for a set of generalized coherent states we define a universal bundle over the infinite–dimensional Grassmann manifold and construct the pu...

The Commonwealth Fund of America generously invited some ten oevsons,ot whom I had the pleasure of being one) connected with the new Child Guidance Council and interested in the prevention of delinquency amongst children, to visit the States. Their main object was to investigate the work of the Child Guidance Clinics and to report how far it was desirable or necessary to establish such clinics ...

In the first half we make a short review of coherent states and generalized coherent ones based on Lie algebras su(2) and su(1,1), and the Schwinger’s boson method to construct representations of the Lie algebras. In the second half we make a review of recent developments on both swap of coherent states and cloning of coherent states which are important subjects in Quantum Information Theory.

It is well-known that the action of a quantum channel on a state can be represented, using an auxiliary space, as the partial trace of an associated bipartite state. Recently, it was observed that for the bipartite state associated with the optimal average input of the channel, the entanglement of formation is simply the entropy of the reduced density matrix minus the Holevo capacity. It is nat...

We exactly evaluate the entanglement of a six vertex and a nine vertex graph states which correspond to non ”twocolorable” graphs. The upper bound of entanglement for five vertices ring graph state is improved to 2.9275, less than upper bound determined by LOCC. An upper bound of entanglement is proposed based on the definition of graph state. PACS number(s): 03.67.Mn, 03.65.Ud, Keyword(s):grap...

A set of new exact ground states of the generalized Hubbard models in arbitrary dimensions with explicitly given parameter regions is presented. This is based on a simple method for constructing exact ground states for homogeneous quantum systems. PACS numbers: 75.10.Jm, 71.27+a SFB 237; BiBoS; CERFIM (Locarno); Acc.Arch., USI (Mendrisio) Institute of Physics, Chinese Academy of Science, Beijing.

Introduced by G.J. Taylor, an Eighteenth century philospher, Thought stopping found its way into behaviour therapeutic procedures by the efforts of Wolpe. It is interesting to know that Wolpe himself had a bout of obsessional rumination and got it treated with thought stopping (Wolpe 1973). Subsequently Yamagami (1970) and Marks et al (1975) have reported on ovltcome that ranges from 75% to 90%...

It is argued that the quantum correction to the mass of some very massive, nonsupersymmetric states vanishes in inverse proportion to their tree-level mass to all orders in string loops. This approximate nonrenormalization can explain the agreement between the perturbative degeneracy of these states and the Sen entropy of the associated black holes.