Nonlinear quantum interferometry with Bose condensed atoms
In quantum interferometry, it is vital to control and utilize nonlinear interactions for the
achievement of high-precision measurements. Due to their long coherence time and high …
achievement of high-precision measurements. Due to their long coherence time and high …
A non-Hermitian symmetric Bose–Hubbard model: eigenvalue rings from unfolding higher-order exceptional points
We study a non-Hermitian symmetric generalization of an N-particle, two-mode Bose–
Hubbard system, modeling for example a Bose–Einstein condensate in a double well …
Hubbard system, modeling for example a Bose–Einstein condensate in a double well …
Mean-field dynamics of a non-Hermitian Bose-Hubbard dimer
We investigate an N-particle Bose-Hubbard dimer with an additional effective decay term in
one of the sites. A mean-field approximation for this non-Hermitian many-particle system is …
one of the sites. A mean-field approximation for this non-Hermitian many-particle system is …
Quantum-classical correspondence for a non-Hermitian Bose-Hubbard dimer
We investigate the many-particle and mean-field correspondence for a non-Hermitian N-
particle Bose-Hubbard dimer where a complex on-site energy describes an effective decay …
particle Bose-Hubbard dimer where a complex on-site energy describes an effective decay …
Josephson oscillation and transition to self-trapping for Bose-Einstein condensates in a triple-well trap
B Liu, LB Fu, SP Yang, J Liu - Physical Review A—Atomic, Molecular, and …, 2007 - APS
We investigate the tunneling dynamics of Bose-Einstein condensates (BECs) in a symmetric
as well as in a tilted triple-well trap within the framework of mean-field treatment. The …
as well as in a tilted triple-well trap within the framework of mean-field treatment. The …
Adiabaticity in nonreciprocal Landau-Zener tunneling
WY Wang, B Sun, J Liu - Physical Review A, 2022 - APS
We investigate the Landau-Zener tunneling (LZT) of a self-interacting two-level system in
which the coupling between the levels is nonreciprocal. In such a non-Hermitian system …
which the coupling between the levels is nonreciprocal. In such a non-Hermitian system …
Quantum entanglement manifestation of transition to nonlinear self-trapping for Bose-Einstein condensates in a symmetric double well
L Fu, J Liu - Physical Review A—Atomic, Molecular, and Optical …, 2006 - APS
We investigate the nonlinear self-trapping phenomenon of a Bose-Einstein condensate
(BEC) in a symmetric double well, emphasizing its underlying dynamical phase transition …
(BEC) in a symmetric double well, emphasizing its underlying dynamical phase transition …
Macroscopic superposition states of ultracold bosons in a double-well potential
We present a thorough description of the physical regimes for ultracold bosons in double
wells, with special attention paid to macroscopic superpositions (MSs). We use a …
wells, with special attention paid to macroscopic superpositions (MSs). We use a …
Spin soliton with a negative-positive mass transition
We obtain a striking spin soliton in a two-component Bose-Einstein condensate and
investigate its motions in the presence of a constant force. The initially static spin soliton first …
investigate its motions in the presence of a constant force. The initially static spin soliton first …
Phase-diffusion dynamics in weakly coupled Bose-Einstein condensates
We study the phase sensitivity of collisional phase diffusion between weakly coupled Bose-
Einstein condensates, using a semiclassical picture of the two-mode Bose-Hubbard model …
Einstein condensates, using a semiclassical picture of the two-mode Bose-Hubbard model …