Giampaolo Salvatore M, Adesso Gerardo, Illuminati Fabrizio
Dipartimento di Matematica e Informatica, Università degli Studi di Salerno, Fisciano (SA), Italy.
Phys Rev Lett. 2008 May 16;100(19):197201. doi: 10.1103/PhysRevLett.100.197201. Epub 2008 May 13.
We introduce a general analytic approach to the study of factorization points and factorized ground states in quantum cooperative systems. The method allows us to determine rigorously the existence, location, and exact form of separable ground states in a large variety of, generally nonexactly solvable, spin models belonging to different universality classes. The theory applies to translationally invariant systems, irrespective of spatial dimensionality, and for spin-spin interactions of arbitrary range.
我们引入了一种通用的解析方法来研究量子合作系统中的因式分解点和因式分解基态。该方法使我们能够严格确定属于不同普适类的各种通常不可精确求解的自旋模型中可分离基态的存在性、位置和精确形式。该理论适用于平移不变系统，与空间维度无关，且适用于任意范围的自旋 - 自旋相互作用。
