scholarly journals Quantum phase transition of light in a one-dimensional photon-hopping-controllable resonator array

2011 ◽  
Vol 84 (4) ◽  
Author(s):  
Chun-Wang Wu ◽  
Ming Gao ◽  
Zhi-Jiao Deng ◽  
Hong-Yi Dai ◽  
Ping-Xing Chen ◽  
...  
Keyword(s):  
Phase Transition ◽  
Quantum Phase Transition ◽  
Quantum Phase ◽  
One Dimensional

ENTANGLEMENT AND QUANTUM PHASE TRANSITION IN A ONE-DIMENSIONAL SYSTEM OF QUANTUM DOTS WITH DISORDER

2006 ◽  
Vol 04 (05) ◽  
pp. 827-835 ◽  
Author(s):  
HEFENG WANG ◽  
SABRE KAIS
Keyword(s):  
Phase Transition ◽  
Quantum Phase Transition ◽  
Quantum Phase ◽  
Physical Parameters ◽  
Dimensional System ◽  
Homogeneous Case ◽  
Electron Hopping ◽  
One Dimensional ◽  
Hubbard Hamiltonian ◽  
Entanglement Of Formation

We study the entanglement of formation and quantum phase transition in a one-dimensional quantum dot system with disorder modeled by the Hubbard Hamiltonian. The entanglement for three different cases is studied: the homogeneous case, the impurity case of symmetric electron hopping, and asymmetric electron hopping. We find that the local entanglement of the system can be tuned by introducing different impurities characterized by the physical parameters of the system. In particular, for certain parameters, the entanglement is negligible up to a critical point Uc, where a quantum phase transition occurs, and is different from zero above Uc.

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