Zobrazeno 1 - 10
of 53
pro vyhledávání: '"R. C. Zamar"'
Publikováno v:
Annals of Physics. 434:168655
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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d9cfdeb4f0327e57cb7541bafc96c1a7
https://doi.org/10.1016/j.aop.2021.168655
https://doi.org/10.1016/j.aop.2021.168655
Publikováno v:
CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET
Refocalization sequences in nuclear magnetic resonance (NMR) can in principle reverse the coherent evolution under the secular dipolar Hamiltonian of a closed system. We use this experimental strategy to study the effect of irreversible decoherence o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::65db124ea771aa5a03103ec85bb09140
http://link.aps.org/doi/10.1103/PhysRevB.95.224423
http://link.aps.org/doi/10.1103/PhysRevB.95.224423
Publikováno v:
Physical Review A. 93
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:
https://explore.openaire.eu/search/publication?articleId=doi_________::7bf6f60fef97955791c57aa6d38f727a
https://doi.org/10.1103/physreva.93.022120
https://doi.org/10.1103/physreva.93.022120
Publikováno v:
Chemical Physics Letters. 356:457-461
The proton intra-pair dipolar order relaxation time ( T 1D ) was measured for nematic methyl-deuterated para -azoxyanisole (PAA d6 ) as a function of both the temperature and concentration in perdeuterated PAA (PAA d14 ), at 27 MHz. Since the results
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0bb6d40b7bc5abac7faff93ead759f53
https://doi.org/10.1016/s0009-2614(02)00347-0
https://doi.org/10.1016/s0009-2614(02)00347-0
Publikováno v:
The Journal of Chemical Physics. 116:1530-1535
Nuclear magnetic resonance experiments on the Larmor frequency dependence of the intrapair dipolar order relaxation time T 1D showed the existence of discrepancies between the usual two-spin theory and the experimental data. Field-cycling experiments
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ca64689fc4e9b0f4335f4f93dfbcaff8
https://doi.org/10.1063/1.1423325
https://doi.org/10.1063/1.1423325
Publikováno v:
The Journal of Chemical Physics. 110:8155-8160
Larmor frequency dependent measurements of Zeeman (T1Z) and dipolar order (T1D) relaxation times provide experimental information on the molecular dynamics in liquid crystals. However, at present, a comprehensive theoretical expression relating T1D w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e375431be9aa1ec87d64e5a247ae4c24
https://doi.org/10.1063/1.478718
https://doi.org/10.1063/1.478718
Publikováno v:
Physical Review B. 58:2476-2481
A detailed study of the temperature dependence of ${}^{35}\mathrm{Cl}$ nuclear quadrupole spin-lattice relaxation time and resonance frequency, in a wide temperature range (77\char21{}450 K), is used to discuss old controversial conclusions about the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3da2674bd410047feb8444e8f9826978
https://doi.org/10.1103/physrevb.58.2476
https://doi.org/10.1103/physrevb.58.2476
Publikováno v:
The Journal of Chemical Physics. 109:1120-1124
Larmor frequency dependent NMR studies of dipolar order relaxation in liquid crystals have seldom been tried in the past. Using conventional static magnetic field techniques, the experiment cannot be extended to the low Larmor frequency (νL) regime
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::24f5e644a1d037f96c6c92f80fb49757
https://doi.org/10.1063/1.476655
https://doi.org/10.1063/1.476655
Publikováno v:
Physica B: Condensed Matter. 320:416-418
We present an experimental study of the thermodynamic properties of proton pairs in two thermotropic nematic liquid crystals: chain deuterated 4-n-pentyl-4′-cyanobyphenyl, 5CBd11, and normal 5CB. In the first sample, we find the existence of pure i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6c3f95826117516f9abe9220fec466cf
https://doi.org/10.1016/s0921-4526(02)00763-9
https://doi.org/10.1016/s0921-4526(02)00763-9
Publikováno v:
Physical review. E, Statistical, nonlinear, and soft matter physics. 83(1 Pt 1)
Starting from the hypothesis that the decay of coherent signals observed in 1H NMR experiments is driven by quantum interference, irreversible decoherence, and nonidealities in the experiment, we design an experiment to isolate and identify the irrev
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5182a54b017596d4b09dad03d4694f88
https://pubmed.ncbi.nlm.nih.gov/21405703
https://pubmed.ncbi.nlm.nih.gov/21405703