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arXiv 2106.01690cond-mat.stat-mech
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Efimov-DNA Phase diagram:立方晶格上的三链DNA

Efimov-DNA Phase diagram: three stranded DNA on a cubic lattice

Somendra M. Bhattacharjee, Damien Paul Foster

摘要:

我们定义了一个广义模型的三链DNA组成的两条链的一种类型和第三链的不同类型。DNA链在三维立方晶格上通过随机行走来建模,其中相同类型的两条链和不同类型的两条链之间具有不同的相互作用。这个模型可以被认为是量子三体问题的经典模拟。在量子情形中,已知三个相同的量子粒子将形成一个三重态,在任何一对粒子的结合能为零的点上,三重态具有无限多的束缚态。绘制出相图,并使用有限尺寸标度检查不同的相变。我们特别期待在相当于Efimov点的DNA模型的缩放链长达10000步。在有限尺寸标度中,我们发现了几个束缚态的明显证据。我们比较这些国家与预期的Efimov行为。

英文摘要:

We define a generalised model for three-stranded DNA consisting of two chains of one type and a third chain of a different type. The DNA strands are modelled by random walks on the three-dimensional cubic lattice with different interactions between two chains of the same type and two chains of different types. This model may be thought of as a classical analogue of the quantum three-body problem. In the quantum situation it is known that three identical quantum particles will form a triplet with an infinite tower of bound states at the point where any pair of particles would have zero binding energy. The phase diagram is mapped out, and the different phase transitions examined using finite-size scaling. We look particularly at the scaling of the DNA model at the equivalent Efimov point for chains up to 10000 steps in length. We find clear evidence of several bound states in the finite-size scaling. We compare these states with the expected Efimov behaviour.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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