Thermal entanglement of a two-qubit Heisenberg chain
Quantum entanglement,as one of the most basic and important physical resources,has shown great practical application prospect in quantum computation and quantum information,and is the foundation of modern quantum computer.In the acquisition of entangled state,some external factors,such as electromagnetic field,tem-perature and so on,will affect the entanglement state in different degrees.In this paper,the thermal entanglement of the spin-1/2 Heis-enberg model is calculated by using two different entanglement measures:Concurrence and Negativity.
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