Spin Cycles Unspun
نویسندگان
چکیده
منابع مشابه
Temperature cycles in the Heisenberg spin glass
We study numerically the nonequilibrium dynamics of the three-dimensional Heisenberg Edwards-Anderson spin glass submitted to protocols during which temperature is shifted or cycled within the spin glass phase. We show that partial rejuvenation and perfect memory effects can be numerically observed and study both effects in detail. We quantitatively characterize their dependences on parameters ...
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Abstract. Hamiltonians for general multi-state spin-glass systems with Ising symmetry are derived for both sequential and synchronous updating of the spins. The possibly different behaviour caused by the way of updating is studied in detail for the (anti)-ferromagnetic version of the models, which can be solved analytically without any approximation, both thermodynamically via a free-energy cal...
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The cyclisation of a short chain into a ring provides fascinating scenarios in terms of transforming a finite array of spins into a quasiinfinite structure. If frustration is present, theory predicts interesting quantum critical points, where the ground state and thus lowtemperature properties of a material change drastically upon even a small variation of appropriate external parameters. This ...
متن کاملشار روی ساختار (spin(7
این پایان نامه شامل چهر فصل می باشد که در فصل اول به بیان تعاریف و مفاهیمی خواهیم پرداخت که در طول این پژوهش مورد نیاز است.در فصل دوم به بررسی خمینه هایی با ساختار (spin(7 خوهیم پرداخت.در فصل سوم به بررسی تجزیه فضای فرم ها خواهیم پرداخت، و در فصل چهارم با استفاده از مشتق گیری معادلات، شار عمومی روی ساختار (spin(7 را بدست خواهیم آورد.
15 صفحه اولOn the application of magic echo cycles for quadrupolar echo spectroscopy of spin-1 nuclei.
Magic echo cycles are introduced for performing quadrupolar echo spectroscopy of spin-1 nuclei. An analysis is performed via average Hamiltonian theory showing that the evolution under chemical shift or static field inhomogeneity can be refocused simultaneously with the quadrupolar interaction using these cycles. Due to the higher convergence in the Magnus expansion, with sufficient RF power, m...
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ژورنال
عنوان ژورنال: Canadian Journal of Communication
سال: 2009
ISSN: 1499-6642,0705-3657
DOI: 10.22230/cjc.2009v34n2a2232