MySQL数据库在嵌入式Linux平台上的移植和应用

MySQL数据库和嵌入式系统的应用十分广泛,但是关于嵌入式系统中数据库方面的研究尚为数不多.通过对MySQL数据库源代码和编译步骤的修改,可以将其移植到嵌入式Linux平台上.移植完成后,使用C语言接口函数编写应用程序便可登录远程数据库并进行查询和修改等操作.将MySQL数据库与MiniGUI图形界面相结合,可以使对数...     

Photonic phase transition in circuit quantum electrodynamics lattices coupled to superconducting phase qubits

A hybrid quantum architecture was proposed to engineer a localization-delocalization phase transition of light in a two-dimension square lattices of superconducting coplanar waveguide resonators, which are interconnected by current-biased Josephson junction phase qubits. We find that the competition between the on-site repulsion and the nonlocal photonic hopping leads to the Mott insulator-superfluid transition. By using the mean-field approach and the quantum master equation, the phase boundary between these two different phases could be obtained when the dissipative effects of superconducting resonators and phase qubit are considered. The good tunability of the effective on-site repulsion and photon-hopping strengths enable quantum simulation on condensed matter physics and many-body models using such a superconducting resonator lattice system. The experimental feasibility is discussed using the currently available technology in the circuit QED.