量子位Heisenberg XX开链中边界量子位之间的纠缠

The entanglement between the boundary qubits inthe five-qubit Heisenberg XX open chain

Heisenberg开链对研究量子态在自旋链上的传递有重要的意义.本文研究了五量子位Heisenberg XX开链中边界量子位之间的纠缠,在该系统中引入了磁杂质和系统杂质且它们之间满足线性关系时,该系统可以精确求解,此时边界量子位之间存在纠缠.选择合适的杂质参数和磁场参数,该边界纠缠的最大值可达到0·5·

Heisenberg XX open chain is very important in the study of quantum state transition. In this paper, we calculate the entanglement between the boundary qubits in the five-qubit Heisenberg XX open chain. When introducing magnetic impurity and system impurity and they satisfy linear relation, the system can be solved exactly, and there exist entanglement between the boundary qubits. Choosing the magnetic and system impurity properly, the boundary entanglement can get the maximal value 0.5.