Ni Liu

activity

20112025

most citedLight-shift-induced quantum phase transitions of a Bose-Einstein condensate in the optical cavities

46 citations · 132 across the 9 of their papers we have counts for

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quant-ph2025

Macroscopic quantum states, quantum phase transition for $N$ three-level atoms in an optical cavity -- Gauge principle and non-Hermitian Hamiltonian

Ni Liu, Xinyu Jia, J. -Q. Liang

We study in this paper the quantum phase transition (QPT) from normal phase (NP) to superradiant phase (SP) for $N$ three-level atoms in a single-mode optical cavity for both Hermi…

quant-ph2025

Quantum mechanics of inverted potential well -- Hermitian Hamiltonian with imaginary eigenvalues, quantum-classical correspondence

Ni Liu, J. -Q. Liang

We in this paper study the quantization of a particle in an inverted potential well. The Hamiltonian is Hermitian, while the potential is unbounded below. Classically the particle…

Macroscopic quantum states, quantum phase transition for N three-level atoms in an optical cavity -- Gauge principle and non-Hermitian Hamiltonian

Quantum mechanics of inverted potential well -- Hermitian Hamiltonian with imaginary eigenvalues, quantum-classical correspondence

Macroscopic quantum states, quantum phase transition for $N$ three-level atoms in an optical cavity -- Gauge principle and non-Hermitian Hamiltonian