ZERO FIELD ENTANGLEMENT IN DIPOLAR COUPLING SPIN SYSTEM AT NEGATIVE TEMPERATURE
2013 ◽
Vol 11
(05)
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pp. 1350050
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Keyword(s):
A dipolar coupled spin system can achieve internal thermodynamic equilibrium states at negative absolute temperature. We study analytically and numerically the temperature dependence of the concurrence in a dipolar coupled spin-1/2 system in both nonzero and zero fields and show that, at negative temperatures, entangled states can exist even in zero magnetic field.
2019 ◽
Vol 17
(03)
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pp. 1950023
2015 ◽
Vol 233-234
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pp. 741-744
2013 ◽
Vol 11
(06)
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pp. 1392001
1988 ◽
pp. 339-348
Keyword(s):
2013 ◽
Vol 138
(18)
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pp. 184202
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Keyword(s):
1975 ◽
Vol 30
(3)
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pp. 361-371
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Keyword(s):