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Письма в Журнал экспериментальной и теоретической физики, 2008, том 88, выпуск 6, страницы 454–457
(Mi jetpl234)
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Эта публикация цитируется в 37 научных статьях (всего в 37 статьях)
КВАНТОВАЯ ИНФОРМАТИКА
Evolution of spin entanglement and an entanglement witness in multiple-quantum NMR experiments
E. B. Fel'dman, A. N. Pyrkov Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Moscow region, 142432, Russia
Аннотация:
We investigate the evolution of entanglement in multiple-quantum (MQ) NMR experiments in crystals with pairs of close nuclear spins-1/2. The initial thermodynamic equilibrium state of the system in a strong external magnetic field evolves under the non-secular part of the dipolar Hamiltonian. As a result, MQ coherences of the zeroth and plus/minus second orders appear. A simple condition for the emergence of entanglement is obtained. We show that the measure of the spin pair entanglement, concurrence, coincides qualitatively with the intensity of MQ coherences of the plus/minus second order and hence the entanglement can be studied with MQ NMR methods. We introduce an Entanglement Witness using MQ NMR coherences of the plus/minus second order.
Поступила в редакцию: 17.07.2008
Образец цитирования:
E. B. Fel'dman, A. N. Pyrkov, “Evolution of spin entanglement and an entanglement witness in multiple-quantum NMR experiments”, Письма в ЖЭТФ, 88:6 (2008), 454–457; JETP Letters, 88:6 (2008), 398–401
Образцы ссылок на эту страницу:
https://www.mathnet.ru/rus/jetpl234 https://www.mathnet.ru/rus/jetpl/v88/i6/p454
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