...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Physical review >Thermodynamics of the Bose-Hubbard model in a Bogoliubov+U theory
【24h】

Thermodynamics of the Bose-Hubbard model in a Bogoliubov+U theory

机译：Bogoliubov + U理论中的Bose-Hubbard模型的热力学

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We derive the Bogoliubov+U formalism to study the thermodynamical properties of the Bose-Hubbard model. The framework can be viewed as the zero-frequency limit of bosonic dynamical mean-field theory (B-DMFT), but equally well as an extension of the mean-field decoupling approximation in which pair creation and annihilation of depleted particles is taken into account. The self-energy on the impurity site is treated variationally, minimizing the grand potential. The theory containing just three parameters that are determined self-consistently reproduces the T = 0 phase diagrams of the three-dimensional and two-dimensional Bose-Hubbard model with an accuracy of 1% or better. The superfluid to normal transition at finite temperature is also reproduced well and only slightly less accurately than in B-DMFT.
机译：我们导出Bogoliubov + U形式主义来研究Bose-Hubbard模型的热力学性质。该框架可以看作是玻色动力学平均场理论（B-DMFT）的零频极限，但同样可以看作是平均场解耦近似的扩展，其中考虑了成对和耗尽粒子的an灭。 。杂质位点上的自能经过不同处理，从而使大势能最小化。仅包含三个自确定参数的理论就可以再现3维和二维Bose-Hubbard模型的T = 0相图，其精度为1％或更高。在有限温度下，从超流体到正态转变的复制也很好，并且精确度仅低于B-DMFT。

著录项

  • 来源
    《Physical review》 |2015年第22期|224510.1-224510.7|共7页
  • 作者

    Dario Huegel; Lode Pollet;

  • 作者单位

    Department of Physics, Arnold Sommerfeld Center for Theoretical Physics and Center for NanoScience, Ludwig-Maximilians-Universitaet Muenchen, Theresienstrasse 37, 80333 Munich, Germany;

    Department of Physics, Arnold Sommerfeld Center for Theoretical Physics and Center for NanoScience, Ludwig-Maximilians-Universitaet Muenchen, Theresienstrasse 37, 80333 Munich, Germany;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    lattice fermion models (hubbard model, etc.); quantum monte carlo methods; boson systems;

    机译：格子费米子模型（哈伯德模型等）;量子蒙特卡洛方法;玻色子系统;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号