Finite temperature phase transition in a cross-dimensional triangular lattice

Jin, Shengjie; Guo, Xinxin; Peng, Peng; Chen, Xuzong; Li, Xiaopeng; Zhou, Xianju

doi:10.1088/1367-2630/ab2b5f

Cited by 15 publications

(11 citation statements)

References 62 publications

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“…In the first 1.5 ms, the coherence of atoms gradually disappears, and re-emerges within a few milliseconds. More technical details of the experimental platform have been provided in our earlier work (29).…”

Section: Methodsmentioning

confidence: 99%

Evidence of Potts-Nematic Superfluidity in a Hexagonal $sp^2$ Optical Lattice

Jin,

Zhang,

Guo

et al. 2019

Preprint

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Nematicity is a long-range orientational order associated with rotation-symmetry breaking in the presence of translational invariance, borne out of the description of classical liquid crystals (1). This order also emerges in interacting electrons and has been found to largely intertwine with multi-orbital correlation in high-temperature superconductivity, where Ising nematicity arises from a four-fold rotation symmetry C 4 brokendown to C 2 (2, 3). Here we report an observation of a bosonic superfluid with a three-state (Z 3 ) quantum nematic order, dubbed "Potts-nematicity", in a system of ultracold atoms loaded in an excited band of a hexagonal optical lattice described by an sp 2 -orbital hybridized model (4, 5). This Potts-nematic superfluid spontaneously breaks a 1

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Section: Methodsmentioning

confidence: 99%

Evidence of Potts-Nematic Superfluidity in a Hexagonal $sp^2$ Optical Lattice

Jin,

Zhang,

Guo

et al. 2019

Preprint

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“…Bipartite square lattice and honeycomb lattice are two bipartite lattices, which are easily achieved in experiments by changing the polarizations of beams [40]. The potential of bipartite lattice is composed of two sets of simple lattice, and the potential of the bipartite square lattice is written as:…”

Section: Scattering Channels In Bipartite Latticesmentioning

confidence: 99%

The dominant scattering channel induced by two-body collision of D-band atoms in triangular optical lattice

Guo,

Yu,

Peng

et al. 2021

Preprint

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The mechanism of atomic collisions in excited bands plays an important role in the study of the orbital physics in optical lattices and simulation of condensed matter physics. Atoms distributing in one excited bands of an optical lattice would collide and decay to other bands through different scattering channels. In excited bands of one dimensional lattice, due to lack of geometry, there is no significant difference between cross section of scattering channels. Here, we investigate the collisional scattering channels for atoms in the excited bands of a triangular optical lattice and demonstrate a dominant scattering channel in the experiment. A shortcut method is utilized to load Bose-Einstein condensates of 87 Rb atoms into the first D band with zero quasi-momentum. After some time for evolution, the number of atoms scattering to S band due to two-body collisions is around four times more than that to the second most band. We reveal that the scattering channel to ss band is dominant by theoretical calculation, which agrees with experimental measurements. The appearance of dominant scattering channels in triangular optical lattice is owing to geometric dimension coupling. This work is helpful for the study of many-body systems and directional enhancement in optical lattices.

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“…The OFRA scheme is based on the PCA, we confirmed its validity by experiments of triangular optical lattices. The experimental configuration has been described in our prior work (28,80). When the experiment was in process, the depth of the lattice was adiabatically raised to a final value, followed by a hold time of 20 ms to keep the atoms in the lattice potential before the optical absorption imaging.…”

Section: Optimized Fringe Removal Algorithm For Absorption Imagesmentioning

confidence: 99%

Study to improve the performance of interferometer with ultra-cold atoms

Dong,

Jin,

Shui

et al. 2021

Preprint

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Ultra-cold atoms provide ideal platforms for interferometry. The macroscopic matter-wave property of ultra-cold atoms leads to large coherent length and long coherent time, which enable high accuracy and sensitivity to measurement. Here, we review our efforts to improve the performance of the interferometer. We demonstrate a shortcut method for manipulating ultra-cold atoms in an optical lattice. Compared with traditional ones, this shortcut method can reduce manipulation time by up to three orders of magnitude. We construct a matter-wave Ramsey interferometer for trapped motional quantum states and significantly increase its coherence time by one order of magnitude with an echo technique based on this method. Efforts have also been made to enhance the resolution by multimode scheme. Application of a noise-resilient multi-component interferometer shows that increasing the number of paths could sharpen the peaks in the time-domain interference fringes, which leads to a resolution nearly twice compared with that of a conventional double-path two-mode interferometer. With the shortcut method mentioned above, im-1

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Finite temperature phase transition in a cross-dimensional triangular lattice

Cited by 15 publications

References 62 publications

Evidence of Potts-Nematic Superfluidity in a Hexagonal $sp^2$ Optical Lattice

Evidence of Potts-Nematic Superfluidity in a Hexagonal $sp^2$ Optical Lattice

The dominant scattering channel induced by two-body collision of D-band atoms in triangular optical lattice

Study to improve the performance of interferometer with ultra-cold atoms

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