分子晶体中非激发和激发双激子的存在
Existence of Unexcited and Excited Biexcitons in Molecular Crystals
摘要：
四体系统理论被重新审视。结果表明，该理论为分子晶体中形成基态（非激发态）双激子提供了严格的证据。该理论的推广预言了自然界中可能存在激发态双激子。为了验证扩展理论在计算水平上的有效性，我们构造了一个非常精细的计算机程序，用于处理任意电子/空穴质量比和任意激子-激子相互作用（VXX）的任意四体系统。当质量比为1，VXX为纯库仑力时，试验结果表明是成功的。在实验水平上实现这些结论将为广泛的工业应用打开大门。
英文摘要：
The theory of four-body systems is revisited. It is illustrated that the theory provides a rigorous proof for the formation of ground state (unexcited) biexcitons in molecular crystals. The generalization of the theory predicts the possible existence of excited biexcitons in nature. In order to test the validity of the extended theory on computational level, a very elaborate computer code is constructed for the treatment of arbitrary four-body system with arbitrary electron/hole mass ratio and arbitrary exciton - exciton interaction (VXX). The results, for mass ratio = 1 and VXX is a pure Coulomb force, show that the test is successful. Realization of these conclusions on experimental level should open the door for wide industrial applications.
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