18 citations · 103 across the 10 of their papers we have counts for
10 papers
Competing few-body correlations in ultracold Fermi polarons
Ruijin Liu, Xiaoling Cui
Polaron, a typical quasi-particle that describes a single impurity dressed with surrounding environment, serves as an ideal platform for bridging few- and many-body physics. In par…
Universal clusters in quasi-two-dimensional ultracold Fermi mixtures
Ruijin Liu, Tingting Shi, Matteo Zaccanti +1
We study universal clusters in quasi-two dimensions (q2D) that consist of a light (L) atom interacting with two or three heavy (H) identical fermions, forming the trimer or tetrame…
Gaussian variational method to Fermi Hubbard model in one and two dimensions
Yue-Ran Shi, Yuan-Yao He, Ruijin Liu +1
The study of ground-state properties of the Fermi-Hubbard model is a long-lasting task in the research of strongly correlated systems. Owing to the exponentially growing complexity…
Quartet Superfluid in Two-dimensional Mass-imbalanced Fermi Mixtures
Ruijin Liu, Wei Wang, Xiaoling Cui
Quartet superfluid (QSF) is a distinct type of fermion superfluidity that exhibits high-order correlation beyond the conventional BCS pairing paradigm. In this Letter, we report th…
Emergence of Crystalline Few-body Correlations in Mass-imbalanced Fermi Polarons
Ruijin Liu, Cheng Peng, Xiaoling Cui
Polarons can serve as an ideal platform to identify few-body correlations in tackling complex many-body problems. In this work, we reveal various crystalline few-body correlations…
Universal tetramer and pentamer in two-dimensional fermionic mixtures
Ruijin Liu, Cheng Peng, Xiaoling Cui
We study the emergence of universal tetramer and pentamer bound states in the two-dimensional system, which consists of identical heavy fermions interacting with a ligh…
Nature of polaron-molecule transition in Fermi polarons
Cheng Peng, Ruijin Liu, Wei Zhang +1
In this work, we explore the polaron and molecule physics by utilizing a unified variational ansatz with up to two particle-hole(p-h) excitations(V-2ph). We confirm the existence o…
A Non-Gaussian Variational Approach to Fermi Polarons in One- and Two-dimensional Lattices
Ruijin Liu, Yue-Ran Shi, Wei Zhang
We study the Fermi polaron problem of one mobile spin-up impurity immersed atop the bath consisting of spin-down fermions in one- and two-dimensional square lattices. We solve this…
Flat-band Ferromagnetism of the SU Hubbard Model on the Tasaki Lattice
Rui-Jin Liu, Wenxing Nie, Wei Zhang
We investigate the para-ferro transition of the repulsive SU() Hubbard model on one- and two-dimensional Tasaki lattices. Under certain restrictions for constructing localized m…
Ashkin-Teller criticality and weak-first-order behavior of phase transition to four-fold degenerate state in two-dimensional frustrated Ising antiferromagnets
R. M. Liu, W. Z. Zhuo, J. Chen +5
We study the thermal phase transitions of the four-fold degenerate phases (the plaquette and single stripe states) in two-dimensional frustrated Ising model on the Shastry-Sutherla…