Spectral properties of strongly correlated bosons in two-dimensional optical lattices

Michael Knap; Enrico Arrigoni; Wolfgang von der Linden

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Spectral properties of strongly correlated bosons in two-dimensional optical lattices

机译：二维光学晶格中强相关玻色子的光谱性质

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Spectral properties of the two-dimensional Bose-Hubbard model, which emulates ultracold gases of atoms confined in optical lattices, are investigated by means of the variational cluster approach. The phase boundary of the quantum phase transition from Mott phase to superfluid phase is calculated and compared to recent work. Moreover the single-particle spectral functions in both the first and the second Mott lobe are presented and the corresponding densities of states and momentum distributions are evaluated. A qualitatively similar intensity distribution of the spectral weight can be observed for spectral functions in the first and the second Mott lobe.

机译：利用变分簇方法研究了二维Bose-Hubbard模型的光谱特性，该模型模拟了限制在光学晶格中的原子的超冷气体。计算了从莫特相到超流体相的量子相变的相界，并将其与最近的工作进行了比较。此外，还给出了第一和第二个Mott瓣中的单粒子光谱函数，并评估了相应的状态密度和动量分布。对于第一和第二莫特波瓣中的光谱函数，可以观察到定性的光谱权重强度分布。

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来源
《Physical review》 |2010年第2期|024301.1-024301.7|共7页
作者
Michael Knap; Enrico Arrigoni; Wolfgang von der Linden;
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作者单位

Institute of Theoretical and Computational Physics, Graz University of Technology, 8010 Graz, Austria;

Institute of Theoretical and Computational Physics, Graz University of Technology, 8010 Graz, Austria;

Institute of Theoretical and Computational Physics, Graz University of Technology, 8010 Graz, Austria;

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正文语种 eng
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关键词
dynamic properties of condensates; collective and hydrodynamic excitations, superfluid flow;

机译：冷凝物的动态特性;集体和流体动力激励;超流;

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机译：玻色动力学平均场理论中光腔中相关晶格玻色子的光谱性质和相图
2. Spectral properties and phase diagram of correlated lattice bosons in an optical cavity within bosonic dynamical mean-field theory [J] . Jaromir Panas, Anna Kauch, Krzysztof Byczuk Physical Review. B, Condensed Matter . 2017,第11a12CD期

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3. Momentum-resolved spectral function of ultracold bosons in two-dimensional optical lattices [J] . T. A. Zaleski PHYSICAL REVIEW A . 2012,第4期

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5. Exact studies of equilibrium and nonequilibrium properties of correlated bosons in one-dimensional lattices. [D] . He, Kai. 2013

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6. Quantum Phases of Two-Component Bosons with Spin-Orbit Coupling in Optical Lattices [O] . Daisuke Yamamoto, I. B. Spielman, C. A. R. Sá de Melo -1

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7. Spectral properties and phase diagram of correlated lattice bosons in an optical cavity within the B-DMFT [O] . Panas, Jaromir, Kauch, Anna, Byczuk, Krzysztof 2017

机译：相关晶格玻色子的光谱性质和相图 B-DmFT内的光学腔

Spectral properties of strongly correlated bosons in two-dimensional optical lattices

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