Urbanization Process and Land Use Policy

Within a framewaork of New Economic Geography (NEG) model, this paper intends to show that urbanization rate in an isolated region is determined as a synthetic rerult of rational behavior of each socio-economic agent. In particular, a model is constructed with bearing to explain the urbanization process in Chaina in mind such that the role of government in managing land use allocation is explicitly incorporated and its policy effects can be evaluated. Some results of theoretical analysis and numerical simulation analysis are contrasted with the ones in Fujita and Krugman (1995) incorporating land into an NEG model as well.

Generating Hermite polynomial excited squeezed states by means of conditional measurements on a beam splitter

A scheme for conditional generating a Hermite polynomial excited squeezed vacuum states (HESVS) is proposed. Injecting a two-mode squeezed vacuum state (TMSVS) into a beam splitter (BS) and counting the photons in one of the output channels, the conditional state in the other output channel is just a HESVS. To exhibit a number of nonclassical effects and non-Guassianity, we mainly investigate the photon number distribution, sub-Poissonian distribution, quadrature component distribution, and quasi-probability distribution of the HPESVS. We find that its nonclassicality closely relates to the control parameter of the BS, the squeezed parameter of the TMSVS, and the photon number of conditional measurement. These further demonstrate that performing the conditional measurement on a BS is an effective approach to generate non-Guassian state.Comment: 8 pages, 8 figures. arXiv admin note: text overlap with arXiv:quant-ph/9703039 by other author