同样自旋向上、向下的电子通过和randomly fluctuating field相互作用从而达到density上的decoupling,如何用quantum Monte Carlo的方法去解这个问题以后再讨论。 最后,Cooperchannel的decoupling也可以用Hubbard-Stratonovich transformation, 即BCS 超导理论的结果可从field integral的角度去分析 Refs:返回搜狐,查看更多 Страт...
Hubbard-Stratonovich Transformation 在介绍更专门的话题前(focus在铜氧化物和重费米子体系,顺便介绍一下磁性系统中的量子相变),我想更细致地梳理一下Hubbard-Stratonovich Transformatio这个方法,因为以后需要不停地使用。其实这个方法在之前超导超流等对称破缺体系的专题中已经被我们使用了若干次,本文旨在给一个更系统的详...
The Hubbard-Stratonovich transformation allows one to formulate the problem of calculating the ground state properties of a many-body theory as one of sampling a distribution. This distribution is constructed by propagating a trial wave function under the influence of a one-body time-dependent ...
Hubbard modelsorbital degeneracyA discrete Hubbard-Stratonovich transformation is presented for systems with an orbital degeneracy $N$ and a Hubbard Coulomb interaction without multiplet effects. An exact transformation is obtained by introducing an external field which takes $N+1$ values. Alternative ...
We settle a long standing issue concerning the traditional derivation of\nnon-compact non-linear sigma models in the theory of disordered electron\nsystems: the hyperbolic Hubbard-Stratonovich (HS) transformation of\nPruisken-Schaefer type. Only recently the validity of such transformations was\n...
Exchange interactions in the Hubbard-Stratonovich transformation for the stability analysis of itinerant ferromagnetismCondensed Matter - Quantum Gasesdoi:10.1103/PhysRevA.98.023635E VermeyenCarlos A R Sa de MeloJacques TemperearXivarXiv e-prints
N., 2003, ``Quantum Monte Carlo Determinantal Algorithm without Hubbard-Stratonovich Transformation: A General Consideration,'' arXiv:cond-mat/0302228.A. N. Rubtsov, Quantum Monte Carlo determinantal algorithm without Hubbard-Stratonovich transformation: a general consideration, unpub- lished (2003), ...
Specifically, we utilize the equivalence between generalized Dicke models and interacting quantum models as a generalization of the Hubbard-Stratonovich transformation. To demonstrate our method, we apply it to the Ising chain in transverse field and discuss its potential application to other models, ...
Nato ScienceI. Yurkevich. Bosonisation as the Hubbard-Stratonovich Transformation. eprint arXiv:cond-mat/0112270, 0(5):1-8, dec 2001. URL http://arxiv. org/abs/cond-mat/0112270. 19Yurkevich I V 2002 Bosonisation as the Hubbard-Stratonovich transformation (Springer)...
This discrete decomposition can be used instead of the Hubbard-Stratonovich transformation in auxiliary-field quantum Monte Carlo methods. As an illustration, the decomposition is applied to the Hubbard model, where it is equivalent to the discrete Hubbard-Stratonovich transformation introduced by Hirsch,...