TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhysProc.14.036
TI  - Mixed permutation symmetry quantum phase transitions of critical three-level atom models
PY  - 2023/11/24
UR  - https://scipost.org/SciPostPhysProc.14.036
JF  - SciPost Physics Proceedings
JA  - SciPost Phys. Proc.
VL  - 
IS  - 14
SP  - 036
A1  - Mayorgas, Alberto
AU  - Guerrero, J.
AU  - Calixto, Manuel
AB  - We define the concept of Mixed Symmetry Quantum Phase Transition (MSQPT), considering each permutation symmetry sector $\mu$ of an identical particles system, as singularities in the properties of the lowest-energy state into each $\mu$ when shifting a Hamiltonian control parameter $\lambda$. A three-level Lipkin-Meshkov-Glick (LMG) model is chosen to typify our construction. Firstly, we analyze the finite number $N$ of particles case, proving the presence of MSQPT precursors. Then, in the thermodynamic limit $N\to∞$, we calculate the lowest-energy density inside each sector $\mu$, augmenting the control parameter space by $\mu$, and showing a phase diagram with four different quantum phases.
ER  -

@Article{10.21468/SciPostPhysProc.14.036,
	title={{Mixed permutation symmetry quantum phase transitions of critical three-level atom models}},
	author={Alberto Mayorgas and  J. Guerrero and  Manuel Calixto},
	journal={SciPost Phys. Proc.},
	pages={036},
	year={2023},
	publisher={SciPost},
	doi={10.21468/SciPostPhysProc.14.036},
	url={https://scipost.org/10.21468/SciPostPhysProc.14.036},
}