Physics – Quantum Physics
Scientific paper
2006-08-28
Phys. Rev. A 74, 062324 (2006)
Physics
Quantum Physics
v1: 4 pages, 2 eps figures; v2: discussion about the effect of temperature added, v3: 1 eps figure added, enlarged discussions
Scientific paper
10.1103/PhysRevA.74.062324
We study the entanglement between pairs of qubits in a random antiferromagnetic spin-1/2 chain at zero temperature. We show that some very distant pairs of qubits are highly entangled, being almost pure Bell states. Furthermore, the probability to obtain such spin pairs is proportional to the chain disorder strenght and inversely proportional to the square of their separation.
Hoyos Jose A.
Rigolin Gustavo
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