Two-Qubits in a Large-S Environment
Keyword(s):
We analytically express the loss of entanglement between the components of a quantum device due to the generation of quantum correlations with its environment, and show that such loss diminishes when the latter is macroscopic and displays a semi-classical behaviour. We model the problem as a device made of a couple of qubits with a magnetic environment: this choice allows us to implement the above condition of semi-classical macroscopicity in terms of a large-S condition, according to the well known equivalence between classical and S → ∞ limit. A possible strategy for protecting internal entanglement exploiting the mechanism of domain-formation typical of critical dynamics is also suggested.
1971 ◽
Vol 29
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pp. 156-157
Keyword(s):
1979 ◽
Vol 40
(11)
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pp. 1055-1061
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1988 ◽
Vol 49
(C8)
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pp. C8-1397-C8-1398
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1984 ◽
Vol 142
(4)
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pp. 619
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Keyword(s):
2019 ◽
Vol 200
(2)
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pp. 1237-1251
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