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arXiv 0907.1258cond-mat.quant-gascond-mat.other
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一维扩展Bose-哈伯德模型中的超固相和孤子相

Supersolid and solitonic phases in one-dimensional Extended Bose-Hubbard model

Tapan Mishra, Ramesh V. Pai, S. Ramanan, Meetu Sethi Luthra, B. P. Das

摘要:

在推广的玻色-哈伯德模型框架下,利用有限尺寸密度矩阵重整化群方法研究了一维光晶格中冷玻色原子的量子相变.我们考虑填充因子和最近邻相互作用的值的宽范围。在相称填充下,我们得到两种不同类型的电荷密度波相位和一个莫特绝缘体相位。然而,偏离相称的填充产生异国情调的超固相晶体和超流秩序共存。此外,我们还获得了孤立波和超流性的签名。

英文摘要:

We report our findings on quantum phase transitions in cold bosonic atoms in a one dimensional optical lattice using the finite size density matrix renormalization group method in the framework of the extended Bose-Hubbard model. We consider wide ranges of values for the filling factors and the nearest neighbor interactions. At commensurate fillings, we obtain two different types of charge density wave phases and a Mott insulator phase. However, departure from commensurate fillings yield the exotic supersolid phase where both the crystalline and the superfluid orders coexist. In addition, we obtain signatures for solitary waves and also superfluidity.

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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