Zobrazeno 1 - 10
of 144
pro vyhledávání: '"Zamar, R."'
Quasi-equilibrium states that can be prepared in solids through Nuclear Magnetic Resonance (NMR) techniques are out-of-equilibrium states that slowly relax towards thermodynamic equilibrium with the lattice. In this work, we use the quantum discord d
Externí odkaz:
http://arxiv.org/abs/2303.16451
Publikováno v:
Annals of Physics (2021)
This work addresses quantum adiabatic decoherence of many-body spin systems coupled with a boson field in the framework of open quantum systems theory. We generalize the traditional spin-boson model by considering a system-environment interaction Ham
Externí odkaz:
http://arxiv.org/abs/1912.12993
New evidence is presented in favor of irreversible decoherence as the mechanism which leads an initial out-of-equilibrium state to quasi-equilibrium in nematic liquid crystals. The NMR experiment combines the Jeener-Broekaert sequence with reversal o
Externí odkaz:
http://arxiv.org/abs/1505.01558
Publikováno v:
Phys. Rev. A 93, 022120 (2016)
We report a first-principle theoretical study of the adiabatic decoherence undergone by a nuclear spin system in a solid, coupled to the phonon field through the dipolar interaction. The calculations are performed for a chain of weakly interacting 1/
Externí odkaz:
http://arxiv.org/abs/1505.01559
In a closed quantum system of N coupled spins with magnetic quantum number I, there are about (2I + 1)^N constants of motion. However, the possibility of observing such quasi-invariant (QI) states in solid-like spin systems in Nuclear Magnetic Resona
Externí odkaz:
http://arxiv.org/abs/1305.1244
Autor:
Segnorile, H. H., Zamar, R. C.
Publikováno v:
THE JOURNAL OF CHEMICAL PHYSICS 139, 154901 (2013)
An experimental study of NMR spin decoherence in nematic liquid crystals (LC) is presented. Decoherence dynamics can be put in evidence by means of refocusing experiments of the dipolar interactions. The experimental technique used in this work is ba
Externí odkaz:
http://arxiv.org/abs/1305.0973
Publikováno v:
J. Chem. Phys. 130, 024501 (2009)
We study the nature of the quasiinvariants in nematic 5CB and measure their relaxation times by encoding the multiple quantum coherences of the states following the JB pulse pair on two orthogonal bases, Z and X. The experiments were also performed i
Externí odkaz:
http://arxiv.org/abs/1007.3540
Publikováno v:
Journal of the Royal Statistical Society. Series B (Statistical Methodology), 2009 Jan 01. 71(1), 301-318.
Externí odkaz:
https://www.jstor.org/stable/20203889
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