Entanglement in the one-dimensional Kondo necklace model
- 23 January 2003
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 67 (1) , 012315
- https://doi.org/10.1103/physreva.67.012315
Abstract
We discuss the thermal and magnetic entanglement in the one-dimensional Kondo necklace model. First, we show how the entanglement naturally present at zero temperature is distributed among pairs of spins according to the strength of the two couplings of the chain, namely, the Kondo exchange interaction and the hopping energy. The effect of temperature and the presence of an external magnetic field are then investigated. We also discuss the adjustment of these variables in order to control the entanglement available in the system. In particular, it is indicated that there exists a critical magnetic field above which the entanglement undergoes a sharp variation, leading the ground state to a completely unentangled phase.Keywords
All Related Versions
This publication has 19 references indexed in Scilit:
- Entanglement properties of the harmonic chainPhysical Review A, 2002
- Entanglement in a simple quantum phase transitionPhysical Review A, 2002
- Scaling of entanglement close to a quantum phase transitionNature, 2002
- Quantum computer hardware based on rare-earth-ion-doped inorganic crystalsOptics Communications, 2001
- Thermal concurrence mixing in a one-dimensional Ising modelPhysical Review A, 2001
- Natural Thermal and Magnetic Entanglement in the 1D Heisenberg ModelPhysical Review Letters, 2001
- Entanglement in the quantum HeisenbergmodelPhysical Review A, 2001
- Quantum Information Processing Using Quantum Dot Spins and Cavity QEDPhysical Review Letters, 1999
- Coupled quantum dots as quantum gatesPhysical Review B, 1999
- A silicon-based nuclear spin quantum computerNature, 1998