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Calculating dynamical spin correlations is essential for matching model magnetic exchange Hamiltonians to momentum-resolved spectroscopic measurements. A major numerical bottleneck is the diagonalization of the dynamical matrix, especially…

SABRE (Signal Amplification By Reversible Exchange) has become a widely used method for hyper-polarizing nuclear spins, thereby enhancing their Nuclear Magnetic Resonance (NMR) signals by orders of magnitude. In SABRE experiments,…

化学物理 · 物理学 2020-12-02 Stephan Knecht , Danila A. Barskiy , Gerd Buntkowsky , Konstantin L. Ivanov

Signal amplification by reversible exchange (SABRE) is a nuclear spin hyperpolarization technique in which the transient interaction of parahydrogen (pH2) and a target substrate with an iridium complex leads to polarization transfer to the…

NMR is uniquely endowed to analyze dynamics, with line shape and relaxation measurements covering timescales over several orders of magnitude. Further insight arises from pulse sequences like chemical exchange saturation transfer or…

化学物理 · 物理学 2026-05-26 Sundaresan Jayanthi , Adonis Lupulescu , Mark Shif , Zuzana Osifova , Lucio Frydman

The effect of dipolar and exchange interactions within pairs of paramagnetic electronic states on Pauli-blockade-controlled spin-dependent transport and recombination rates during magnetic resonant spin excitation is studied numerically…

材料科学 · 物理学 2013-04-24 M. E. Limes , J. Wang , W. J. Baker , S. -Y. Lee , B. Saam , C. Boehme

We implement several non-binary logic systems using the spin dynamics of nuclear spins in nuclear magnetic resonance (NMR). The NMR system is a suitable test system because of its high degree of experimental control; findings from NMR…

新兴技术 · 计算机科学 2015-12-03 Pedro M. Aguiar , Robert Hornby , Cameron McGarry , Simon O'Keefe , Angelika Sebald

A theoretical approach is proposed for quantitative modeling of SABRE (Signal Amplification By Reversible Exchange) experiments performed at a high magnetic field of an NMR spectrometer. SABRE is a method, which exploits the spin order of…

化学物理 · 物理学 2019-05-01 Stephan Knecht , Konstantin L. Ivanov

The effect of nuclear polarisation on the non-linearities of King plot for isotope shift in Ca$^+$, Sr$^+$ and Yb$^+$ ions is studied. These ions are currently used in search for the manifestation of new interaction via non-linearities of…

原子物理 · 物理学 2021-12-30 P. Munro-Laylim , V. A. Dzuba , V. V. Flambaum

We develop an efficient package for the simulation of nuclear magnetic resonance spin echo experiments to study the effects of strong electronic spin correlations on the dynamics of the nuclear spin ensemble. A mean-field model is used to…

强关联电子 · 物理学 2026-02-09 Charles Snider , Stephen Carr , D. E. Feldman , Chandrasekhar Ramanathan , V. F. Mitrović

The Liouville space spin relaxation theory equations are reformulated in such a way as to avoid the computationally expensive Hamiltonian diagonalization step, replacing it by numerical evaluation of the integrals in the generalized…

化学物理 · 物理学 2014-07-16 Ilya Kuprov

We describe a new approach to precision NMR with hyperpolarized gases designed to mitigate NMR frequency shifts due to the alkali spin exchange field. The electronic spin polarization of optically pumped alkali atoms is square-wave…

原子物理 · 物理学 2015-12-23 Anna Korver , Daniel Thrasher , Mike Bulatowicz , Thad Walker

The results of calculations of nuclear magnetic resonance (NMR) parameters for the lead halides is reported in this paper. The results are obtained by using four-component methods. The use of the nonrelativistic L\'evy-Leblond Hamiltonian…

原子物理 · 物理学 2008-04-14 Rodolfo H. Romero

We present a first principles supercell methodology for the calculation of exchange interactions of magnetic materials with arbitrary degrees of structural and chemical disorder in their high temperature paramagnetic state. It is based on a…

材料科学 · 物理学 2015-06-16 A. Lindmaa , R. Lizárraga , E. Holmström , I. A. Abrikosov , B. Alling

Understanding the solvation structure of electrolytes is critical for optimizing the electrochemical performance of rechargeable batteries, as it directly influences properties such as ionic conductivity, viscosity, and electrochemical…

化学物理 · 物理学 2025-04-23 Qi You , Yan Sun , Feng Wang , Jun Cheng , Fujie Tang

We present the effective Hamiltonian for an electron-nucleus interaction in non-relativistic limit up to the second order in the inverse nucleon mass. This Hamiltonian takes into account the distortion of electron waves and allows to…

核理论 · 物理学 2007-05-23 R. Ya. Kezerashvili

A new method of computing multipolar exchange interaction in spin-orbit coupled systems is developed using multipolar tensor expansion of the density matrix in LDA+U electronic structure calculation. Within mean-field approximation,…

强关联电子 · 物理学 2014-03-06 Shu-Ting Pi , Ravindra Nanguneri , Sergey Savrasov

The procedure for simulating the nuclear magnetic resonance spectrum linked to the spin system of a molecule for a certain nucleus entails diagonalizing the associated Hamiltonian matrix. As the dimensions of said matrix grow exponentially…

量子物理 · 物理学 2024-10-29 Joaquín Ossorio-Castillo , Alexandre Rodríguez-Coello

These summer school lectures cover the use of algebraic techniques in various subfields of nuclear physics. After a brief description of groups and algebras, concepts of dynamical symmetry, dynamical supersymmetry, and supersymmetric…

核理论 · 物理学 2015-05-20 A. B. Balantekin

We take an approach to the $\Lambda$ nonmesonic weak decay in nuclei based on the exchange of mesons under the guidelines of chiral Lagrangians. The one pion and one kaon exchange are considered, together with the exchange of two pions,…

核理论 · 物理学 2009-11-06 E. Oset , D. Jido , J. E. Palomar

A systematic calculation of nuclear matter is performed which includes the long-range correlations between nucleons arising from one- and two-pion exchange. Three-body effects from $2\pi$-exchange with excitations of virtual…

核理论 · 物理学 2008-11-26 N. Kaiser , M. Mühlbauer , W. Weise
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