23 papers · ranked by Valyu relevance
J. M. de Voogd, J. J. T. Wagenaar, T. H. Oosterkamp
We calculate the change of the properties of a resonator, when coupled to a semiclassical spin by means of the magnetic field. Starting with the Lagrangian of the complete system, we provide an analytical expression for the linear response function for the motion in the case of a mechanical resonator and the current…
M. C. Baldiotti, C. Molina
In the present work the Rabi Problem, involving the response of a spin 1/2 particle subjected to a magnetic field, is considered in a second quantized approach. In this concrete physical scenario, we show that the second quantization procedure can be applied directly in a non-covariant theory. The proposed development…
Giovani E. Morales-Hernández, Juan C. Castellanos, José L. Romero, Andrei B. Klimov + 2 more
'Andrei B. Klimov' 'Antonino Messina' 'Agostino Migliore'] We apply the semi-classical limit of the generalized $SO(3)$ map for representation of variable-spin systems in a four-dimensional symplectic manifold and approximate their evolution terms of effective classical dynamics on $T*S_{2}$. Using the asymptotic form…
Ioannis Rousochatzakis, Yuriy Sizyuk, Natalia B. Perkins
Quantum spin liquids (QSLs) have been at the forefront of correlated electron research ever since their proposal in 1973, and the realization that they belong to the broader class of intrinsic topological orders. According to received wisdom, QSLs can arise in frustrated magnets with low spin S, where strong quantum…
Kenichi Konishi, Roberto Menta
Quantum states of a spin 1 2 (a qubit) are parametrized by the space CP1 ∼ S 2 , the Bloch sphere. A spin j (a 2j+1-state system) for generic j is represented instead by a point of a larger space, CP2j . Here we study the angular momentum/spin in the limit, j → ∞. The state, (Jˆ · n)|j, n⟩ = j |j, n⟩, where Jˆ is the…
Oliver Waldmann
Lanthanide Clusters Can Be Good Single Molecule Magnets Authors: Oliver Waldmann Lanthanide complexes with a low-symmetry ligand environment are frequently observed to exhibit good single molecule magnet (SMM) behavior, which is seemingly at odds with the established understanding that strong Ising-type magnetic…
Robert Wieser
The derivation of the time dependent Schr¨odinger equation with transversal and longitudinal relaxation, as the quantum mechanical analog of the classical Landau-Lifshitz-Bloch equation, has been described. Starting from the classical Landau-Lifshitz-Bloch equation the transition to quantum mechanics has been performed…
Nishchhal Verma, Zachariah Addison, Mohit Randeria
Spontaneously broken time-reversal symmetry in magnetic materials leads to a Hall response, with a nonzero voltage transverse to an applied current, even in the absence of external magnetic fields. It is common to analyze the Hall resistivity of chiral magnets as the sum of two terms: an anomalous Hall effect arising…
G. H. Goedecke
In this second paper in a series, we show that the the general statistical approach to nonrelativistic quantum mechanics developed in the first paper yields a representation of quantum spin and magnetic moments based on classical nonrelativistic spinning top models, using Euler angle coordinates. The models allow…
Victor Henner, Andrey R. Klots, Tatyana Belozerova
Problems of interacting quantum magnetic moments become exponentially complex with increasing number of particles. As a result, classical equations are often used but the validity of reduction of a quantum problem to a classical problem should be justified. In this paper we formulate the correspondence principle, which…
Asher Yahalom, Rosario Lo Franco
Electrons moving at slow speeds much lower than the speed of light are described by a wave function which is a solution of Pauli’s equation. This is a low-velocity limit of the relativistic Dirac equation. Here we compare two approaches, one of which is the more conservative Copenhagen’s interpretation denying a…
Siddhartha Sen, Tomas Ryan, David Muldowney, Maurizio Pezzoli
A special charged surface network with surface spin half particles on it, that can be arranged in topologically inequivalent ways, is introduced. It is shown that action potential-like signals can be generated in the network in response to local surface deformations of a particular kind. Signals generated in this way…
Authors not listed
Ongoing research involving electronic spin-dependent dynamics, such as chiral- induced spin selectivity, is providing impetus to revise our understanding of nuclear en- tanglement with electronic spatial and spin degrees of freedom. In a spin-independent setting, non-adiabatic couplings are well-known mediators of…
Eric Koessler, Arkajit Mandal, Pengfei Huo
We derive the L-MFE method to incorporate Lindblad jump operator dynamics into the mean-field Ehrenfest (MFE) approach. We map the density matrix evolution of Lindblad dynamics onto pure state coefficients using trajectory averages. We use simple assumptions to construct the L-MFE method that satisfies this exact…
Authors not listed
This article is the second in a two-part tutorial review on electronic spin-dependent dynamics. In Part I, we presented the fundamental theory within the adiabatic Born– Huang framework that describes the interaction between nuclear motion and the elec- tronic (spin and spatial) degrees of freedom. In particular, we…
Christian Kerskens
Non-compact symmetries such as SU(1,1) govern quantum amplification and squeezing, yet have not been directly identified in macroscopic spin ensembles. Here we apply a symmetry-based analytical framework to previously published magnetic resonance data acquired from proton spin ensembles in the living human brain. By…
Pratik Vyas, Kakali Santra, Naupada Preeyanka, Anu Gupta + 6 more
We investigated the association of two model primordial polypeptides, each bearing an ancient and ubiquitous phosphate-binding motif, with DNA. The association rate and the amount of bound DNA relates to the electron spin-dependent polarizability of the binding protein. Contributions to protein polarizability are also…
Eric R. Heller, Jeremy O. Richardson
The spin-crossover reaction of thiophosgene has drawn broad attention from both experimenters and theoreticians as a prime example of radiationless intramolecular decay via intersystem crossing. Despite multiple attempts over 20 years, theoretical predictions have typically been orders of magnitude in error relative to…
Authors not listed
Most advances in electronic spin-dependent non-adiabatic dynamics focus on refining the underlying dynamics methods. In contrast, this work considers an improved description of spin-orbit coupling by explicitly accounting for its relativistic origins. To this end, we extend a standard one-electron triatomic…
Martin D. Gelenter, Aurelio J. Dregni, Mei Hong
We introduce a class of pulsed third-spin-assisted recoupling (P-TSAR) magic-angle-spinning (MAS) solid-state NMR techniques that achieve efficient polarization transfer over long distances to provide important restraints for structure determination. These experiments operate with the same principle as continuous-wave…
Eric Keeler, Ann McDermott
Magic angle spinning NMR rotating frame relaxation measurements provide a powerful experimental strategy to probe biomolecules dynamics, as is illustrated by numerous recent applications. We discuss experimental strategies for this class of experiments, with a particular focus on systems where motion-driven modulation…
Rishabh, Hadi Zadeh-Haghighi, Christoph Simon
Weak magnetic field exposure can affect many biological processes across a wide range of living organisms. Recently, it has been observed that weak magnetic fields can modulate reactive oxygen species (ROS) concentration, affecting regeneration in planaria. These effects show unusual nonlinear dependence on magnetic…
Yuchuan Wang, Yang Zhang, Ruochi Zhang, Tom van Schaik + 8 more
Chromosomes segregate differentially relative to distinct subnuclear structures, but this genome-wide compartmentalization, pivotal for modulating genome function, remains poorly understood. New genomic mapping methods can reveal chromosome positioning relative to specific nuclear structures. However, computational…