首页> 外文期刊>The Journal of Chemical Physics >Excitation spectra of systems of indistinguishable particles by the autocorrelation function technique: Circumventing the exponential scaling for bosons
【24h】

Excitation spectra of systems of indistinguishable particles by the autocorrelation function technique: Circumventing the exponential scaling for bosons

机译:通过自相关函数技术的无法区分粒子系统的激发光谱:绕过玻色子的指数缩放

获取原文
获取原文并翻译 | 示例
           

摘要

We consider the autocorrelation function technique for obtaining excitation spectra for indistinguishable particles. The interacting particles are described by coherent superpositions of configurations built from time-dependent spin-orbitals. The fermionic or bosonic character of the particles is taken into account by considering Slater determinants or permanents, respectively. The approach involves the calculation of overlaps between nonorthonormal Slater determinants for fermions and permanents for bosons. Efficient methods already exist for fermions. In the case of bosons, the evaluation of permanents generally scales exponentially with system size. We present an efficient approach for bosons for calculating the excitation spectrum, which circumvents this scaling. The approach is illustrated and validated by comparison with an analytical model for interacting bosons, for a system with a number of bosons so large that the autocorrelation technique could not be applied without the present development. Published under license by AIP Publishing.
机译:我们考虑获得难以区分粒子的激发光谱的自相关函数技术。相互作用颗粒由由时间依赖性旋转轨道构建的配置的相干叠加描述。通过考虑层状测定剂或永久物,考虑颗粒的Fermionic或孢子态特征。该方法涉及计算非正规层间在玻源的离费米子和永久物之间的重叠。费米星已经存在有效的方法。在玻色子的情况下,对永久性的评估通常以系统尺寸指数呈指数级。我们为计算激励光谱呈现了一种有效的方法,这些磁共振来计算这种缩放。通过与磁共振的分析模型进行比较示出和验证了这种方法,对于具有多个磁振荡的系统,如此之大,在没有当前发育的情况下无法应用自相关技术。通过AIP发布在许可证下发布。

著录项

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