Zobrazeno 1 - 10
of 53
pro vyhledávání: '"Yu Zeng-Qiang"'
Publikováno v:
Phys. Rev. Lett. 130, 193001 (2023)
Quantum liquid, in the form of a self-bound droplet, is stabilized by a subtle balance between the mean-field contribution and quantum fluctuations. While a liquid-gas transition is expected when such a balance is broken, it remains elusive whether l
Externí odkaz:
http://arxiv.org/abs/2209.13559
Publikováno v:
Phys. Rev. A 104, 043301 (2021)
Bose-Einstein condensation, observed in either strongly interacting liquid helium or weakly interacting atomic Bose gases, is widely known to be a second-order phase transition. Here, we predict a first-order Bose-Einstein condensation in a cloud of
Externí odkaz:
http://arxiv.org/abs/2103.16044
Publikováno v:
Phys. Rev. Lett. 125, 055301 (2020)
For pseudospin-half bosons with inter-spin attraction and intra-spin repulsion, normal phase and Bose condensed phase can coexist at finite temperature. The homogeneous system is unstable against the spinodal decomposition within a medium density int
Externí odkaz:
http://arxiv.org/abs/1910.12776
Publikováno v:
Phys. Rev. A 95, 033616 (2017)
We investigate the collective excitations of a Raman-induced spin-orbit coupled Bose-Einstein condensate confined in a quasi one-dimension harmonic trap using the Bogoliubov method. By tuning the Raman coupling strength, three phases of the system ca
Externí odkaz:
http://arxiv.org/abs/1704.01242
Autor:
Yu, Zeng-Qiang
Publikováno v:
Phys. Rev. A 95, 033618 (2017)
In this work, we discuss the Landau's criterion for anisotropic superfluidity. To this end, we consider a point-like impurity moving in a uniform Bose-Einstein condensate with either interparticle dipole-dipole interaction or Raman induced spin-orbit
Externí odkaz:
http://arxiv.org/abs/1701.08686
Autor:
Zhang, Yi-Cai, Yu, Zeng-Qiang, Ng, Tai Kai, Zhang, Shizhong, Pitaevskii, Lev, Stringari, Sandro
Publikováno v:
Phys. Rev. A 94, 033635 (2016)
We discuss the superfluid properties of a Bose-Einstein condensed gas with spin-orbit coupling, recently realized in experiments. We find a finite normal fluid density $\rho_n$ at zero temperature which turns out to be a function of the Raman couplin
Externí odkaz:
http://arxiv.org/abs/1605.02136
Autor:
Yu, Zeng-Qiang
Publikováno v:
Phys. Rev. A 93, 033648 (2016)
We study the ground state phase diagram and the quantum phase transitions in spin-1 Bose gases with Raman induced spin-orbit coupling. In addition to the Bose-Einstein condensates with uniform density, three types of stripe condensation phases that s
Externí odkaz:
http://arxiv.org/abs/1512.04091
Autor:
Yu, Zeng-Qiang
Publikováno v:
Phys. Rev. A 90, 053608 (2014)
We study two-component Bose gases with Raman induced spin-orbit coupling via a perturbation approach at finite temperature. For weak coupling, free energy is expanded in terms of Raman coupling strength up to the second order, where the coefficient (
Externí odkaz:
http://arxiv.org/abs/1407.0990
Autor:
Yu, Zeng-Qiang
Publikováno v:
Phys. Rev. A 87, 051606(R) (2013)
Ground-state phase diagram of two-component Bose gases with Rashba spin-orbit coupling is determined via a variational approach. A phase in which the fully polarized condensate occupies zero momentum is identified. This zero-momentum phase competes w
Externí odkaz:
http://arxiv.org/abs/1304.2690
Publikováno v:
J. Phys. B, 46, 134007 (2013)
In this paper we investigate the properties of Bose gases with Raman-induced spin-orbit(SO) coupling. It is found that the SO coupling can greatly modify the single particle density-of-state, and thus lead to non-monotonic behavior of the condensate
Externí odkaz:
http://arxiv.org/abs/1212.6832