Quantum phase transition and entanglement in Li atom system
arXiv:0705.0184 · doi:10.1007/s11433-008-0180-9
Abstract
In this paper we study the quantum phase transition and entanglement in s1=1/2 and s2=1 spin pair system by the exact diagonalization method. We show that, for this exactly solvable quantum bi-spin system, entanglement appears before quantum phase transition and disappears after it. Moreover, we show that the von Neumann entropy, as a measure of entanglement, can reveal quantum phase transition in this system.
5 pages, 2 figures
References in corpus (7)
- Quantum Phase Transitions and Bipartite Entanglement
- Entanglement and Quantum Phase Transition Revisited
- Divergence of the entanglement range in low dimensional quantum systems
- Environmentally induced Quantum Dynamical Phase Transition in the spin swapping operation
- Local Measures of Entanglement and Critical Exponents at Quantum Phase Transitions
- Entanglement in extended Hubbard models and quantum phase transitions
- Signatures of a quantum dynamical phase transition in a three-spin system in presence of a spin environment