Results 11 to 20 of about 57,735 (231)
Preparation of Nuclear Spin Singlet States Using Spin-Lock Induced Crossing [PDF]
Physical Review Letters, 2013 We introduce a broadly applicable technique to create nuclear spin singlet states in organic molecules and other many-atom systems. We employ a novel pulse sequence to produce a spin-lock induced crossing (SLIC) of the spin singlet and triplet energy levels, which enables triplet/singlet polarization transfer and singlet state preparation.
Devience, Stephen +2 more
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Representation of population exchange at level anti-crossings [PDF]
Magnetic Resonance, 2020 A theoretical framework is proposed to describe the spin dynamics driven by coherent spin mixing at level anti-crossings (LACs). We briefly introduce the LAC concept and propose to describe the spin dynamics using a vector of populations of the diabatic ...
B. A. Rodin +3 more
doaj +1 more source
Algorithmic cooling of nuclear spins using long-lived singlet order [PDF]
The Journal of Chemical Physics, 2020 Algorithmic cooling methods manipulate an open quantum system in order to lower its temperature below that of the environment. We achieve significant cooling of an ensemble of nuclear spin-pair systems by exploiting the long-lived nuclear singlet state, which is an antisymmetric quantum superposition of the “up” and “down” Zeeman states.
Bogdan A. Rodin +8 more
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Investigation of the spin-forbidden process in thymine [PDF]
Hemijska Industrija, 2012 The intersystem crossing rate from the lowest singlet to the lowest triplet state of thymine was studied by means of the ab initio methods. The rate was calculated employing the time-dependent approach based on the correlation function.
Etinski Mihajlo R.
doaj +1 more source
Competing spin-orbital singlet states in the 4d^{4} honeycomb ruthenate Ag_{3}LiRu_{2}O_{6}
Physical Review Research, 2022 When spin-orbit-entangled d electrons reside on a honeycomb lattice, rich quantum states are anticipated to emerge, as exemplified by the d^{5} Kitaev materials. Distinct yet equally intriguing physics may be realized with a d-electron count other than d^
T. Takayama +27 more
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Molecules, 2020 Many chemical reactions of transition metal compounds involve a change in spin state via spin inversion, which is induced by relativistic spin-orbit coupling.
Toshiyuki Takayanagi +2 more
doaj +1 more source
Effect of temperature on rate of the spin-forbidden transition in uracil and thymine [PDF]
Journal of the Serbian Chemical Society, 2013 The intersystem crossing rates of uracil and thymine molecules in interaction with the heat bath were studied by means of the ab initio methods. The rates were calculated employing the time-dependent approach based on the correlation function.
Etinski Mihajlo
doaj +1 more source
Physical Review X, 2020 High-spin states play a key role in chemical reactions found in nature. In artificial molecular systems, singlet fission produces a correlated triplet-pair state, a spin-bearing excited state that can be harnessed for more efficient solar-energy ...
S. L. Bayliss +6 more
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Accessing long-lived nuclear singlet states between chemically equivalent spins without breaking symmetry [PDF]
Nature Physics, 2012 Long-lived nuclear spin states could greatly enhance the applicability of hyperpolarized nuclear magnetic resonance. Using singlet states between inequivalent spin pairs has been shown to extend the signal lifetime by more than an order of magnitude compared to the spin lattice relaxation time (T1), but they have to be prevented from evolving into ...
Ryan M. Davis +2 more
openaire +3 more sources
Dynamic Nuclear Polarization with Single Electron Spins [PDF]
, 2007 We polarize nuclear spins in a GaAs double quantum dot by controlling two-electron spin states near the anti-crossing of the singlet (S) and m_S=+1 triplet (T+) using pulsed gates.
A. C. Gossard +8 more
core +1 more source