8,054 research outputs found
The quasi-particle gap in a disordered boson Hubbard model in two dimensions
We investigate the behavior of the quasi-particle energy gap near quantum
phase transitions in a two-dimensional disordered boson Hubbard model at a
commensurate filling. Via Monte Carlo simulations of ensembles with fixed
numbers of particles, we observe the behavior of the gap as a function of the
tuning parameter for various strength of diagonal disorder. For weak disorder,
we find that gapped Mott insulating phase is sustained up to the transition
point and disappears only in a superfluid, strongly supporting a direct
Mott-insulator-to-superfluid transition. Bose glass behavior, insulating with
vanishing gap, appears only when the strength of disorder is bigger than a
critical value
Controlling Citrate Synthase Expression by CRISPR/Cas9 Genome Editing for n-Butanol Production in Escherichia coli
2,9,16,19,22,25-Hexaoxatetracyclo[24.4.0.24,7.010,15]dotriaconta-1(26),4,6,10(15),11,13,27,29,31-nonaene
The title 22-crown-6 unit, C26H28O6, comprising of three benzo groups and triethylene glycol, was prepared by the reaction of α,α′-dibromo-p-xylene with 1,8-bis(2-hydroxyphenoxy)-3,6-dioxaoctane in the presence of Cs2CO3 with tetrahydrofuran (THF) and recrystallized from dichloromethane–hexane (1:20 v/v) at room temperature. In the molecular structure, two O atoms of the central ethylene glycol in the triethylene glycol unit exhibit exo conformations due to intramolecular C—H⋯O interactions. A number of C—H⋯O and C—H⋯π intermolecular interactions contribute to the stabilization of the crystal packing
Proposal for direct measurement of concurrence via visibility in a cavity QED system
An experimental scheme is proposed that allows direct measurement of the
concurrence of a two-qubit cavity system. It is based on the cavity-QED
technology using atoms as flying qubits and relies on the identity of the
two-particle visibility of the atomic probability with the concurrence of the
cavity system. The scheme works for any arbitrary pure initial state of the
two-qubit cavity system.Comment: To appear in Physical Review A as a Rapid Comminicatio
Deep learning image reconstruction algorithm for abdominal multidetector CT at different tube voltages:assessment of image quality and radiation dose in a phantom study
Implications of MicroRNAs in the Vascular Homeostasis and Remodeling
Vascular remodeling or arterial remodeling is a process of adaptive alteration of vascular wall architecture and leads to the endothelial cell (EC) dysfunction and synthetic or contractile phenotypic change of VSMCs, and the infiltration of monocytes and Macrophages that promotes vascular diseases including atherosclerosis. Recent findings have demonstrated that microRNAs (miRNAs) are involved in regulating gene expression at posttranscriptional level and disease pathogenesis. A change of miRNA expression profiles plays key roles in the gene expressions and the regulation of cellular functions. In this chapter, we summarize the vascular remodeling-related miRNAs and their functions in vascular biology
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