Quantum Monte Carlo study of the two-dimensional ferromagnet

G.J.Conduit

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Quantum Monte Carlo study of the two-dimensional ferromagnet

机译：二维铁磁体的量子蒙特卡洛研究

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We present quantum Monte Carlo calculations that probe the paramagnet-ferromagnet phase transition in a two-dimensional Stoner Hamiltonian.With a screened Coulomb interaction we observe a first-order ferromagnetic transition for short screening lengths, and a second-order transition with a longer screening length, accompanied by a rising critical interaction strength.Finally, we discuss the consequences of our results for an ultracold atomic gas with finite ranged interactions.

机译：我们提出了量子蒙特卡罗计算方法，以探测二维斯托纳·哈密顿方程中的顺磁体-铁磁体相变。通过屏蔽库仑相互作用，我们观察到较短屏蔽长度的一阶铁磁跃迁和较长屏蔽的二阶跃迁。最后，我们讨论了结果对于具有有限范围相互作用的超冷原子气体的结果。

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来源
《Physical review》 |2013年第18期|184414.1-184414.7|共7页
作者
G.J.Conduit;
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作者单位

Cavendish Laboratory, J J.Thomson Avenue, Cambridge CB3 OHE,United Kingdom;

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正文语种 eng
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关键词
solutions of wave equations: bound states; tunneling, traversal time, quantum zeno dynamics;

机译：波动方程的解：束缚态隧穿;穿越时间;量子Zeno动力学;

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Quantum Monte Carlo study of the two-dimensional ferromagnet

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